IAD - SEA

$139 Find Cheap Flights from Washington Dulles Airport to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Dulles Intl to Seattle departing on 1/29. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
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These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Seattle.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Seattle.
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Cheap Flight Deals from Washington Dulles Airport to Seattle (IAD-SEA)

 
These are the cheapest deals for flights from Dulles Intl to Seattle currently on KAYAK along with options from the most popular airlines KAYAK users selected for this route. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from Dulles Intl to Seattle

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Dulles Intl to Seattle.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
4:20 pm - 7:20 pmIAD-SEA
6h 00mnonstop
7:25 am - 3:25 pmSEA-IAD
5h 00mnonstop
$277Delta
Find Deal
Sat, Feb 1 - Sat, Feb 8
6:57 pm - 10:00 pmIAD-SEA
6h 03mnonstop
9:54 am - 5:57 pmSEA-IAD
5h 03mnonstop
$282Alaska Airlines
Find Deal
Wed, Jan 29 - Mon, Feb 3
6:22 am - 7:10 pmIAD-SEA
15h 48m1 stop
1:43 pm - 8:41 amSEA-IAD
15h 58m1 stop
$283American Airlines
Find Deal
Wed, Jan 29 - Sun, Feb 2
6:57 pm - 10:00 pmIAD-SEA
6h 03mnonstop
7:50 pm - 4:23 pmSEA-IAD
17h 33m1 stop
$286Alaska Airlines
Find Deal
Sat, Jan 11 - Tue, Jan 14
5:00 am - 9:18 pmIAD-SEA
19h 18m1 stop
10:18 pm - 8:43 amSEA-IAD
7h 25m1 stop
$290American Airlines
Find Deal
Sat, Feb 1 - Sat, Feb 8
5:30 pm - 8:31 pmIAD-SEA
6h 01mnonstop
11:59 pm - 11:48 amSEA-IAD
8h 49m1 stop
$292United Airlines
Find Deal
Wed, Jan 8 - Sun, Jan 12
5:30 pm - 8:31 pmIAD-SEA
6h 01mnonstop
8:00 am - 4:06 pmSEA-IAD
5h 06mnonstop
$293United Airlines
Find Deal
Tue, Jan 14 - Sat, Jan 18
7:30 am - 10:37 amIAD-SEA
6h 07mnonstop
10:00 pm - 6:00 amSEA-IAD
5h 00mnonstop
$308Delta
Find Deal
Wed, Mar 19 - Wed, Mar 26
4:00 pm - 12:30 amIAD-SEA
11h 30m2 stops
8:00 am - 11:00 pmSEA-IAD
12h 00m2 stops
$416Southwest
Find Deal
Fri, Dec 13 - Tue, Dec 17
7:25 am - 8:45 pmIAD-SEA
16h 20m2 stops
10:00 am - 11:05 pmSEA-IAD
10h 05m1 stop
$421Southwest
Find Deal
Mon, Dec 16 - Mon, Jan 13

Flights from Dulles Intl to Seattle - Travel Insights & Trends

Get data-powered insights and trends into flights from Dulles Intl to Seattle to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Washington Dulles Airport to Seattle?

The average price of all flights from Washington, D.C. Dulles Intl Airport to Seattle clicked on KAYAK for each day over the last 12 months.
Your flight ticket price will generally be cheaper if you fly to Seattle on a Tuesday and more expensive on a Sunday. On your return trip to Washington Dulles Airport, you should consider flying back on a Tuesday, and avoid Sundays for better deals.

What is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to Seattle?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Washington, D.C. Dulles Intl Airport to Seattle, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Washington, D.C. Dulles Intl Airport to Seattle is January, where tickets cost $331 on average. On the other hand, the most expensive months are June and July, where the average cost of tickets is $496 and $486 respectively.

How far in advance should I book a flight from Washington, D.C. Dulles Intl Airport to Seattle?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Washington, D.C. Dulles Intl Airport to Seattle, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Washington, D.C. Dulles Intl Airport to Seattle, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 30 days before departure.

Good to know

Low season

January

High season

July

Cheapest flight

$139
Best time to beat the crowds with an average 14% drop in price.
Most popular time to fly with an average 18% increase in price.
Flight from Washington Dulles Airport to Seattle

When to book flights from Dulles Intl to Seattle

Are your dates flexible? Find out the best times to travel from Dulles Intl to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Washington Dulles Airport to Seattle flights

  • How can I get from the Sea-Tac Airport (SEA) to my hotel in downtown Seattle?

    There are a few options to get you from the airport to your hotel in downtown Seattle. One option is the subway system that picks up passengers on the 4th floor of the parking garage. There are a couple of bus services at the Sea-Tac Airport. King County Metro travels to various parts of the city of Seattle while Sound Transit takes passengers to the outlining cities of Bellevue and Renton. The buses pick up by the subway station.

  • Where can I park my car long-term at the Washington Dulles Airport?

    Very close to the terminal, there is a parking garage and a terminal parking lot. There is also an economy lot a little further away. A shuttle service will take you from the economy lot to the main terminal of the airport.

  • What restaurants are at the Washington Dulles Airport?

    There are a couple of bars, a pizzeria, and a burger place where you can dine. Some well-known restaurants in this airport include Auntie Anne's, Carrabba's Italian Grill, Chick-Fil-A, and Jersey Mike's Subs.

  • What lounges are at these two airports?

    Both airports have lounges where you can enjoy some quiet time. These lounges also offer complimentary drinks and snacks. They are sponsored by airlines, credit card companies, or the airport. At the Washington Dulles Airport, there is a United Airlines, British Airways, and an Air France lounge. The Sea-Tac Airport has lounges affiliated with United Airlines, American Express, Delta Airlines, and Alaska Airlines.

  • What is the cheapest flight from Washington, D.C. Dulles Intl Airport to Seattle?

    In the last 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Seattle was $139 for a one-way ticket and $277 for a round-trip.

  • Do I need a passport to fly between Washington Dulles Airport and Seattle?

    A passport is not required to fly from Washington Dulles Airport to Seattle.

  • Which airports will I be using when flying from Washington Dulles Airport to Seattle?

    Washington Dulles Airport and Seattle are both served by 1 main airport. You will leave Washington Dulles Airport from Washington, D.C. Dulles Intl and will be arriving at Seattle/Tacoma Intl.

  • Which airlines offer Wi-Fi service onboard planes from Washington Dulles Airport to Seattle?

    Alaska Airlines, Delta, and American Airlines offer inflight Wi-Fi service on the Washington Dulles Airport to Seattle flight route.

  • Which aircraft models fly most regularly from Washington Dulles Airport to Seattle?

    The Boeing 737 MAX 9 is the aircraft model that flies most regularly on the Washington Dulles Airport to Seattle flight route.

  • Which airline alliances offer flights from Washington Dulles Airport to Seattle?

    oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between Washington Dulles Airport and Seattle, with Star Alliance being the most commonly used for this route.

  • On which days can I fly direct from Washington Dulles Airport to Seattle?

    There are nonstop flights from Washington Dulles Airport to Seattle on a daily basis.

  • Which is the best airline for flights from Washington, D.C. to Seattle, Alaska Airlines or Delta?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Seattle are Alaska Airlines and Delta. With an average price for the route of $424 and an overall rating of 8.0, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of $393 and an overall rating of 8.0.

  • How does KAYAK find such low prices on flights from Washington Dulles Airport to Seattle?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington Dulles Airport to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington Dulles Airport to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Washington Dulles Airport is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Washington Dulles Airport to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Washington Dulles Airport with another airline. Booking your flights between Washington Dulles Airport and SEA can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington Dulles Airport to Seattle?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Washington Dulles Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

KAYAK’s top tips for finding a cheap flight from Washington, D.C. Dulles Intl Airport to Seattle

  • Looking for a cheap flight? 25% of our users found flights on this route for $236 or less one-way and $376 or less round-trip.
  • You can book a nonstop flight from Washington Dulles Airport (IAD) to the Seattle-Tacoma International Airport (SEA). However, there are some flight routes that will require you to switch planes in either Salt Lake City, Dallas-Fort Worth, or San Francisco.
  • The Washington Dulles International Airport (IAD) has a simple layout. It has one main terminal that connects to four concourses from which departure and arrival flights are managed. To assist passengers with getting around, the airport is equipped with moving walkways, escalators, and elevators. It also has a people mover system that is known as the AeroTrain, it goes from one side of the airport to another.
  • The SEA underground makes it easy to get around the Seattle-Tacoma International Airport (SEA). This is a people mover system or tram that goes around the airport including the main terminal, the north terminal, the south terminal, and the four concourses.
  • There is lots to do and see at the Seattle-Tacoma International Airport. You can explore African culture in the Africa Lounge. Here you can enjoy African-inspired drinks and food. Throughout the year, the airport hosts live musical concerts. These concerts take place in the central terminal, in front of Sub Pop Records, and close to the children's play area.
  • Numerous rental car agencies have offices at the Sea-Tac Airport. This includes Budget, Dollar, Hertz, and Thrifty just to name a few. The rental car center is located offsite. However, there is a shuttle bus that will take you from the airport to the car rental lot.
See more tips

Flights from Dulles Intl to Seattle: the best tips from KAYAK users' own experiences

Insights shared by verified travelers who flew the route from Dulles Intl to Seattle 
Verified travelerFlew with Alaska AirlinesIAD-SEASep 2024
Pay the money if can afford to upgrade your seats
Verified travelerFlew with Alaska AirlinesIAD-SEAJul 2024
Dulles, like Seattle has a tram. That can be surprising. The TSA at Seattle is notoriously LONG, however, both times in the last year that I have flown, that has not been the case. At Dulles, the TSA lines were efficient as well. The airport interior is well marked for getting around. I did note that the garbages were full in the Southwest and Alaska areas- as we were there 6 hours and had lots of time to notice nit-picky things that nobody else would care about :). It was convenient to have a "charging station" nearby the Alaska waiting area (right across from our gate). It had 3 ports, and I noticed that as soon as I unplugged mine, it was jumped right on. Suggestion- have Dulles add a few more for passengers who need to recharge phones. Great experience, thank you.
MarylinFlew with DeltaIAD-SEAMar 2024
Delta by far is a great airline, they’re fast and great staff. I just wish they had a little more snacks
Verified travelerFlew with Alaska AirlinesIAD-SEAMay 2024
Get to the airport early, especially on holidays

Prefer to fly non-stop from Washington Dulles Airport to Seattle?

Find which airlines fly direct from Washington, D.C. Dulles Intl Airport to Seattle/Tacoma Intl Airport, which days they fly and book direct flights.

Nonstop departures

Washington, D.C. Dulles Intl to Seattle/Tacoma Intl

Monday

Air Tahiti Nui, Alaska Airlines, Avianca, +14 more

Air Tahiti Nui, Alaska Airlines, +15 more

Tuesday

Air Tahiti Nui, Alaska Airlines, Austrian Airlines, +13 more

Air Tahiti Nui, Alaska Airlines, +14 more

Wednesday

Air Tahiti Nui, Alaska Airlines, Avianca, +14 more

Air Tahiti Nui, Alaska Airlines, +15 more

Thursday

Air Tahiti Nui, Alaska Airlines, Austrian Airlines, +14 more

Air Tahiti Nui, Alaska Airlines, +15 more

Friday

Air Tahiti Nui, Alaska Airlines, Austrian Airlines, +15 more

Air Tahiti Nui, Alaska Airlines, +16 more

Saturday

Air Tahiti Nui, Alaska Airlines, Austrian Airlines, +15 more

Air Tahiti Nui, Alaska Airlines, +16 more

Sunday

Air Tahiti Nui, Alaska Airlines, Austrian Airlines, +14 more

Air Tahiti Nui, Alaska Airlines, +15 more

See more direct flights

Nonstop returns

Seattle/Tacoma Intl to Washington, D.C. Dulles Intl

Monday

Air Tahiti Nui, Alaska Airlines, Avianca, +12 more

Air Tahiti Nui, Alaska Airlines, +13 more

Tuesday

Air Tahiti Nui, Alaska Airlines, Austrian Airlines, +14 more

Air Tahiti Nui, Alaska Airlines, +15 more

Wednesday

Air Tahiti Nui, Alaska Airlines, Avianca, +12 more

Air Tahiti Nui, Alaska Airlines, +13 more

Thursday

Air Tahiti Nui, Alaska Airlines, Austrian Airlines, +14 more

Air Tahiti Nui, Alaska Airlines, +15 more

Friday

Air Tahiti Nui, Alaska Airlines, Austrian Airlines, +13 more

Air Tahiti Nui, Alaska Airlines, +14 more

Saturday

Air Tahiti Nui, Alaska Airlines, Austrian Airlines, +14 more

Air Tahiti Nui, Alaska Airlines, +15 more

Sunday

Air Tahiti Nui, Alaska Airlines, Austrian Airlines, +14 more

Air Tahiti Nui, Alaska Airlines, +15 more

See more direct flights
See more direct flights

Top 5 airlines serving from Dulles Intl to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Seattle. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Dulles Intl to Seattle? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Alaska AirlinesOverall score based on 9464 reviews
7.2Food
7.1Entertainment
8.2Boarding
8.5Crew
7.9Comfort
Airline reviews

Overall good. Good communication from the captain on delay, cozy seats, nice staff, and a perfect landing.

10.0 ExcellentAnonymous, Nov 2024SMF - SEA
Read more Alaska Airlines reviews

Overall good. Good communication from the captain on delay, cozy seats, nice staff, and a perfect landing.

The plane was clean. The flight crew was friendly and helpful. The flight was smooth and the pilots kept everyone informed of our status, etc. It was my first flight on Alaska Airlines and it was great. I'll be choosing them again in the future.

Good but a boarding pass for my return flight was not sent to me.

I really wish there were TV monitors. I don’t have a mastery of computers, so I was left with a six hour flight, and no entertainment.

Good flight and crew. Wonderful to be on time! Only drawback, I didn’t know ahead of time there was no back-of-the-seat tv screen.

Everything was fine. There was just quite a bit of turbulence, which always makes me very anxious.

On my trip from Seattle to San Jose it would’ve been nice to have the gate transfer nearby instead of at the opposite end of the airport that’s it

This was our fist time flying Alaska Airlines. Overall it was a great experience. Ticket counter, gate agents and flight attendants were all wonderful. They all seemed happy at what they do and it shows. Of 4 legs, the onboard WiFi was spotty on 1 leg. The food in first class cabin was ok. Couldn’t get the text messaging notifications to work so had to rely on Flight Aware and the Alaska App. Flights were on time and uneventful. We would def fly Alaska Airlines again :)

Both flights were delayed, the Bellingham to Seattle flight was delayed so much I nearly missed my connection with a two hour layover to spare. I could have driven to Seattle and back in the amount of time the flight was delayed. Seattle to Bellingham Washington also delayed. Not good.

I've flown at least six times this past year. For some reason, the entry into Seattle felt like the worst ever. It felt like the plane was going too high, too fast for entry and then a very rough landing. Could have been the weather. All else was fine. Please consider changing snacks from pretzel sticks to nuts as an option.

Delta was great the entertainment was outdated. Screen was very small and didn’t work.

The seats are uncomfortable, feels like a small seat pad on plywood.

My husband is very tall and we generally fly Delta Comfort. We used our companion benefit, and our seats were coach and extremely uncomfortable........ horrid even

My seat had no padding, it was literally plywood with a plastic cover. I could not change seats on my 10 hour flight. My excitement for this trip helped me deal with the pain.

I notice that every time I fly delta or any American carrier, the staff seem tired, overworked, and not at the service level I’m accustomed to in Asia. They frequently crash into my arm when coming down the aisle. Food is shoved at my face with no greeting or verbal cue. The food portions seemed much smaller than usual and didn’t see much wine or beverage options. This is comfort plus? The plane was old and tired. The bathroom was dripping with mineral stains after a long lack of cleaning. The power socket did not work, although the USB output did. I really wonder why I’m flying Delta, I think it’s time to switch to ANA.

The flight was great. The crew were a little terse about the size of my bag. It fit fine.

Screen didn’t play movies, do I was pretty boated the entire flight.

It was very cold because the air conditioner was on high power, and my son got sick.

Delta crushed it. Flight attendant in first was attentive and just never stopped. Honestly one of the best domestic flights I’ve been on.

Delta is one of the best airlines I have flown

The plane was clean. The staff was excellent. The flight attendants were very good. Enjoyable flight. Overall. The seats in the back are too small but, will always be.

This was a 5 hour flight with no entertainment and with a snack being provided (pretzels and fruit bar), which are both high in carbs and sugar. Nuts would have been a better choice.

Everything was perfect except the pad at the top of the seat back. It pushes my head forward in a very uncomfortable position and it is not removable.

Good plane, crew, and flight. Boarding was a bit chaotic. Bathrooms were unacceptable. United DESPERATELY needs a new terminal at IAD.

United Airlines changed my flight 5 hours before I arrived at the airport. This messed up my entire day that I arrived in Japan.

The Economy Plus rows weren’t as roomy as expected, and the meal service left a lot to be desired for.

United ground crew and pilots are friendly. The in-flight staff (flight attendants) are the worst in the world. Multiple trips, always unpleasant, combative, use implicit threats to not allow for a discussion on their decision. Authoritarian. This seems to stem from an internal corporate wide policy as I doubt that United is intentionally searching for people that are not fit for customer facing positions. I will not fly United again. Good luck fixing your business

Everything was fantastic. Modern plane. All the amenities! Although the paid snacks and meals are pure robbery. Like i understand airlines need to make money, but 11$ USD for an overnight oats with some nuts in it and barely any pieces of apple.... Highway robbery

The flight was mostly on time, smooth and deplaning was quick. Baggage was really quick at the claim. Comfort was so-so and I paid for economy plus. It was still too crowded and why was a family of 5 scattered all around the plane?

We boarded and buckled and then deplaned due to no pilot. Had to wait over 3 hours for a new pilot. Not weather related, just poor management.

No food, no entertainment. But the flight was really short so maybe they had to skip drinks. I was able to board early ONLY because I am old and decrepit and they let me pre-board. I RESENT your dumping us into category 9 if we do not pay up. And when I paid for a seat I was STILL given 9. The pre-boarding helps. THIS flight was exceptionally smooth, please congratulate the pilots.

On time (actually a little early). Was a good and short flight!

Great - quick boarding and landed early with an available gate.

On time, smooth, luggage was out fast at the end of the flight. About perfect.

The main problem was delay. The plane was at the gate early and bags were loaded. However, there was no crew for the flight. They were inbound from LGA and had to land and make their way to our gate. It took more than 40 minutes. Then, once the crew arrived and boarded, one of the crew members had to deplane and then a replacement crew member had to be found. It took another 40 minutes or so to get the final crew member. In all, we took off about 2 hours later than our scheduled departure time. Once in the air, the flight was great. Smooth most of the way. The crew was professional and efficient.

Flight departed on time and arrived a bit early. Can’t go wrong with that! And makes a travel experience go so well

WiFi wasn’t working on the flight, several delays and gate changes, ended up taking off 3 hrs later

delayed multiple times. no resolution on anything from AA customer service. was put on hold in chat to talk to manager. was 6th in line to talk to manager for more than TWELVE HOURS - from sometime around 9AM until well after I had gone to bed that evening. no explanation, no attempt to make it right. just a five hour delay because of repeated maintenance claims

Gate check in of luggage was smooth at DCA and luggage came out fast in IND.

This is by far the worst experience I have had with American Airlines. The start of this trip was a complete disaster. I purposely planned my trip so that I would weather any delays so that I could make very important meeting at the Pentagon. My flight was cancelled because of maintenance and I was put on the first flight the next day but I was late to the meeting. After a long week at the Pentagon I just wanted to go home and my flight home which was early in the day was delayed. Eventually the flight was delayed until the next day. I was not authorized a hotel room because DCA was my point of origin. So I paid for a hotel out of pocket. The flight this morning was boarded then deplaned because the aircraft was hot. The flow of information was not happening in DCA and made it worse when the news was bad. I am going to take a break from American for my next few military flights. Hopefully whatever has been going on with American Airlines will be resolved.

I purchased an aisle seat but was put in the middle seat surrounded by families with small sick children (3). That can happen anytime and I was prepared. The ticket agent questioned why I hadn’t paid for my luggage and had to explain that 2 pieces were included with my ticket. I hate that nickel and diming attitude. Please inform your staff better.

I know the airline has been open for 40 years and the flight crew looked just as old. The flight attendants were not friendly and rude. They should think of retiring this crew.

The crew was friendly, but I only got a drink, no food.

Flight was late, boarding was a mess, families separated so they could make extra profit.

Great! A delay in taking off but that’s it

Terrible boarding experience at sea tac. Displayed on time departure despite being about an hour behind in boarding time. Boarded a bus to go to the tarmac to then board onto the plane.

Hidden fees everywhere while we aware of the fees but it quickly added up to a premium airline. From 12+ dollars to pick your set to $55 dollars a checked bag. No counter at the Portland Airport until 2 hrs before the flight made it so we couldn't get anything to eat before the flight. Pre checking your bags wasn't working on-line or at the kiosk, so we had to pay extra 5 dollars per bag for counter checking. So after everything was said and done, we ended up paying an extra $200. Plane was nice and clean plane staff was nice and attentive.

Excellent. Except seat C2 starting to be worned down. Very uncomfortable.

22 hour delayed flight. I will not fly again. I missed training due to this.

Well my connecting flight was initially delayed 2 hours. Then it became a 21 hour delay. When I woke up the next morning the flight was then delayed another hour. I ended up missing a day and a half of training due to this. When asked if there was any way I could be transferred to a different flight I was told no because it was under a 24 hour delay. I will not fly with this airline again.

Book cheap flights from Washington, D.C. to Seattle

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Washington, D.C. to Seattle found on KAYAK in the last 72 hours.
1/29Wed
nonstopDelta
6h 00mIAD-SEA
$139
12/11Wed
1 stopAmerican Airlines
17h 05mIAD-SEA
$142
1/9Thu
nonstopUnited Airlines
6h 01mIAD-SEA
$144
2/19Wed
1 stopUnited Airlines
10h 52mIAD-SEA
$148
4/29Tue
nonstopAlaska Airlines
5h 45mIAD-SEA
$170
5/5Mon
1 stopAlaska Airlines
19h 56mIAD-SEA
$185
12/11Wed
3 stops
39h 26mIAD-SEA
$202
5/18Sun
1 stopSun Country Air
7h 42mIAD-SEA
$213
3/8Sat
2 stops
16h 35mIAD-SEA
$238
11/27Wed
1 stopSun Country Air
13h 04mIAD-SEA
$274

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Last minute flights from Dulles Intl to Seattle

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Washington, D.C. to Seattle that are departing in the next 10 days.
11/26Tue
multi-stopSun Country Air
7h 41mIAD-SEA
11/28Thu
multi-stopSun Country Air
22h 20mSEA-IAD
$535
11/26Tue
nonstopAlaska Airlines
5h 54mIAD-SEA
12/3Tue
multi-stopAlaska Airlines
17h 33mSEA-IAD
$576
11/26Tue
multi-stop
7h 41mIAD-SEA
11/28Thu
nonstop
5h 02mSEA-IAD
$630
11/26Tue
multi-stopUnited Airlines
17h 41mIAD-SEA
12/3Tue
multi-stopUnited Airlines
8h 49mSEA-IAD
$634
11/22Fri
multi-stopAmerican Airlines
10h 44mIAD-SEA
1/5Sun
multi-stopAmerican Airlines
7h 40mSEA-IAD
$642
11/22Fri
nonstopUnited Airlines
6h 00mIAD-SEA
1/5Sun
multi-stopUnited Airlines
8h 57mSEA-IAD
$652
11/26Tue
nonstopDelta
6h 13mIAD-SEA
11/29Fri
nonstopDelta
5h 01mSEA-IAD
$657
11/24Sun
nonstop
5h 58mIAD-SEA
11/27Wed
multi-stop
8h 26mSEA-IAD
$683
11/23Sat
multi-stopAmerican Airlines
18h 55mIAD-SEA
11/26Tue
multi-stopAmerican Airlines
15h 41mSEA-IAD
$754
11/24Sun
nonstopDelta
6h 13mIAD-SEA
12/3Tue
nonstopDelta
4h 58mSEA-IAD
$773

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Everything you need to know for your flight from Dulles Intl to Seattle

Information on your arrival and departure airports

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