Find flights
Deals
Insights
When to book
FAQs & Tips
Airlines

PWM - SEA

$104 Find cheap flights from Portland, Maine 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 Portland to Seattle departing on 8/21. 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.
1 adult
0 bags
Fri 6/21
Fri 6/28

Search hundreds of travel sites at once for deals on flights to Seattle

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to Seattle, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to Seattle, as well as popular online travel agencies
In the last 7 days travelers have searched 43,423,329 times on KAYAK, and here is why:

Save 21% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

Cheap flight deals from Portland to Seattle (PWM-SEA)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Portland to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
5:13 pm - 10:50 pmPWM-SEA
8h 37m1 stop
1:45 pm - 12:42 amSEA-PWM
7h 57m1 stop
$195American Airlines
Find Deal
Wed, Sep 25 - Wed, Oct 2
1:18 pm - 8:43 pmPWM-SEA
10h 25m1 stop
11:59 pm - 11:24 amSEA-PWM
8h 25m1 stop
$210American Airlines
Find Deal
Thu, Sep 26 - Tue, Oct 1
12:55 pm - 8:30 pmPWM-SEA
10h 35m1 stop
12:30 am - 10:43 amSEA-PWM
7h 13m1 stop
$236Delta
Find Deal
Tue, Sep 24 - Mon, Sep 30
12:55 pm - 8:30 pmPWM-SEA
10h 35m1 stop
10:00 am - 11:07 pmSEA-PWM
10h 07m2 stops
$241Delta
Find Deal
Tue, Sep 24 - Tue, Oct 1
3:55 pm - 10:15 pmPWM-SEA
9h 20m1 stop
11:59 pm - 10:47 amSEA-PWM
7h 48m1 stop
$328United Airlines
Find Deal
Wed, Aug 21 - Mon, Aug 26
1:40 pm - 8:08 amPWM-SEA
21h 28m1 stop
11:59 pm - 11:57 amSEA-PWM
8h 58m1 stop
$400Sun Country Air
Find Deal
Thu, Jun 20 - Thu, Jun 27
12:56 pm - 10:54 pmPWM-SEA
12h 58m1 stop
11:59 pm - 12:11 pmSEA-PWM
9h 12m1 stop
$422Sun Country Air
Find Deal
Fri, Jun 28 - Sun, Jun 30
3:50 pm - 10:58 pmPWM-SEA
10h 08m1 stop
11:29 pm - 10:32 amSEA-PWM
8h 03m1 stop
$426United Airlines
Find Deal
Tue, Jun 11 - Thu, Jun 13
1:40 pm - 8:32 amPWM-SEA
21h 52m2 stops
5:50 pm - 11:57 amSEA-PWM
15h 07m1 stop
Thu, Jun 20 - Thu, Jun 27
12:13 pm - 11:54 pmPWM-SEA
14h 41m2 stops
11:59 pm - 12:35 pmSEA-PWM
9h 36m1 stop
Sat, Jul 20 - Thu, Aug 8

Flights from Portland to Seattle - Travel Insights & Trends

Get data-powered insights and trends into flights from Portland 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 Portland to Seattle?

The average price of all flights from Portland, Maine to Seattle clicked on KAYAK for each day over the last 12 months.
For Portland to Seattle, Tuesday is the cheapest day to fly on average and Sunday is the most expensive. Flying from Seattle back to Portland, the best deals are generally found on Tuesday, with Saturday being the most expensive.

What is the cheapest month to fly from Portland, Maine to Seattle?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Portland, Maine 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 Portland, Maine to Seattle is October, where tickets cost $436 on average. On the other hand, the most expensive months are December and July, where the average cost of tickets is $730 and $694 respectively.

How far in advance should I book a flight from Portland, Maine to Seattle?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Portland, Maine 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 Portland, Maine to Seattle, you should book around 1 day before departure. For the absolute cheapest price, our data suggests you should book 50 days before departure.

Which airlines provide the cheapest flights from Portland to Seattle?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the past 3 days, the cheapest one-way tickets to Seattle from Portland were found on American Airlines ($104) and United Airlines ($114), and the lowest round-trip tickets were found on American Airlines ($195) and Delta ($236).

Good to know

Low season

March

High season

August

Cheapest flight

$104
Best time to beat the crowds but there is an average 3% increase in price.
Most popular time to fly with an average 5% increase in price.
Flight from Portland to Seattle

When to book flights from Portland to Seattle

Are your dates flexible? Find out the best times to travel from Portland 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 flights from Portland to Seattle

  • What is the cheapest flight from Portland, Maine to Seattle?

    In the last 3 days, the lowest price for a flight from Portland, Maine to Seattle was $104 for a one-way ticket and $195 for a round-trip.

  • Do I need a passport to fly between Portland and Seattle?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which airports will I be using when flying from Portland to Seattle?

    Portland and Seattle are both served by 1 main airport. You will leave Portland from Portland and will be arriving at Seattle/Tacoma Intl.

  • Which aircraft models fly most regularly from Portland to Seattle?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Portland to Seattle?

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

  • Which is the best airline for flights from Portland to Seattle, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Portland to Seattle are Delta and United Airlines. With an average price for the route of $581 and an overall rating of 8.0, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $597 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Portland 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 Portland to Seattle.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Portland 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 Portland 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 Portland with another airline. Booking your flights between Portland 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 Portland 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 Portland up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top 5 airlines serving from Portland to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Portland 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 Portland 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
DeltaOverall score based on 10583 reviews
8.2Boarding
7.4Food
8.0Entertainment
7.9Comfort
8.6Crew
Airline reviews

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

10.0 ExcellentDonald, May 2024FLL - SEA
Read more about Delta reviews

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

It was a Red-Eye flight so was not comfortable enough to sleep, but seat was as expected. Crew was great and in-flight entertainment was excellent. Flight was smooth

Standard economy seats on Deltas 767 were better than Alaska premium seats on their 737 MAX9; more legroom, wider seats. Entertainment was great, no ipad or phone required. Could have included a meal service.

Plane was turned around due to fog half way into the flight, Delta did not properly direct passengers to stay on same flight and instead failed to properly rebook on Alaska

The boarding process was terrible especially with an indirect flight Chicago to Seattle to San Diego was terrible talking about we overbooked a flight idk if I’d take this airline ever again we got off our flight from Chicago to Seattle and we traveled for business and they told us our connecting flight was over booked and their was no seats asking people to take a delayed next flight and they don’t tell anyone coughing to wear masks seats 30A-B were terrible during the flight no one wants to sit next to people coughing all around I don’t want to be sick traveling for work or get sick anytime it’s very upsetting the staff doesn’t take this stuff serious to tell them to wear masks when they see people coughing and sneezing

Flight was on time, the crew was personable & professional, & the plane arrived early which was nice.

This flight landed early, but deplaned late. We were stuck sitting and waiting for a gate for over an hour

My flight was very clean and the location was comfortable. The service was great. A satisfying flight!

I appreciated being upgraded. I was very disappointed with my 13 hr layover in Seattle to geg, while my friends who flew Alaska made it home as scheduled. I had to reserve a hotel on my dime.

We were told that our flight would be delayed for 90+ minutes because of weather, so we went to get something to eat only to have them randomly start boarding 15 minutes after the announcement, with no warning.

Entertainment... No earphones passed out. Many including me couldn't use the TV. Legroom was good. Crew was indifferent and a bit surly. Free wifi was a nice convenience. Check in desk location was unknown. Gate number on the boarding passes was wrong.

Going through JFK’s security is a mess. The TSA security said no shoes on the bins. So, we place our shoes in the belt and they came out all over the belt. Boarding was delayed and Flight as well.

Safe and on time were the positives. The plane wasn't cleaned before boarding, there was garbage and food on the floor and in the seat pocket. The TV screen was small and the picture fuzzy, audio quality was poor. Seatbelt was fraying and seat did not recline properly. No charging ports near the seats,

Confusing. Delay updates were out of whack At one point it said my flight was 25 hours. Three gate changes and two delays only to change back to original departure time. Gate announcer and on board flight attendant (Alejandro) making the announcements was impossible to understand due to accent and speed of speech. After beverage service the rear flight attendants sat back there on their phones. No refills no checking in, one sweep through for trash collection. Very impersonal. Bring back Coke products

Delayed departure. Delayed after landing pulling into gate. Delay due to sky bridge malfunction

Great. Loved that there was WiFi on flight to keep in touch and excellent service of beverages and snacks.

Business class is great. New airplane, very comfortable, better than some of the major airlines I am used to

Terrible. Flight was cancelled due to the weather in the east and sout east(florida). Did not get any compesation of any kind. According to them, it was not under their control so I lost all the money paid for the 2 fairs from Raleigh, NC to Orlando, Fl.

great flight. Pilot was communicative, flight attendants were excellent. Really nice experience except my tv didn’t work.

Fantastic. Smooth boarding with an infant. Never experienced it with any other carriers.

This was a Lufthansa flight, not United. The CSA at the counter, Ashley, was not only incompetent, but quite rude. Me and two other PAX waited over 7 minutes standing in front of her and another CSA and they ignored us. We joked that we must have accidently taken invisibility pills. She could have at least said "I'll be with you in a moment, I'm currently....". I could go on about how rude she and the other CSAs were (whispering, not communicating with me, blaming the situation on others, etc.). She would not work for me. Then, she gave me literally the worst seat on the plane. the worst. My seat kept getting bumped (rammed twice by the crew with their carts and about every 5 minutes by someone using the bathroom), listening to the bathroom all night, crowded seat, etc.

My seat was broken. WiFi didn’t work. Gate crew at HOU were rude and condescending. Treated all the passengers badly. Bad experience, United.

First flight of the day… MINIMUM FUEL! 15 minute landing delay at HOU due to fog turned into a 2+ hour delay! Rather than circle, they had to divert to another city to refuel! Sat on tarmac at Austin to refuel. We ALL missed our connections! The crew, including pilots, were clueless. Crew was really a mess. At HOU, Untied employees were exceedingly rude to all. It was pitiful.

An hour and a half late is UNACCEPTABLE. The negative impact to our family is unconscionable. And for the price we were forced to pay...

No lounge access with “United First” ticket. False alarm about late flight, jeopardizing connection. Wrong meal. Loose power socket would not hold plug, could not charge device. In-flight access to text messaging did not work. Toilet seat on plane would not stay up.

We ended up with seats in the very back. So they did not recline. Have no idea why, we reserved and checked in very early. The isles were very narrow and the seats had very little leg room. But they did give us water, and a snack.

Check in etc was very good. As for on the plane, it was like flying in a freezer. It was so cold, i have flown for years and never been so cold on a plane. Staff on board said its always cold when flying which is a load of rubbish. They wouldnt put any heating on and now i have the flu because of this .

I’ve had a couple flights this week on United that were delayed by an hour or more

Surprisingly easy! I was hesitant to try this, but the cost swayed me. I actually felt like I had less stress than all the taxiing and possible delays that occur with short regional flights where you spend less time in the air than getting to and from the plane..

Delayed so that missed connecting flight. Connecting flight was also delayed on the tarmac but they closed the gate before the rescheduled time.

Attendants were rude. Scowling. Seats were miserable and we paid extra.

Took off over an hour late with multiple mechanical issues. Gate agent in Dallas was lazy and was slow as molasses. Had a line 10 people long. Spirit bad..

The flight was short. However, my bag was delayed and was put on another flight.

Flight attendant was incredible. Very efficient, friendly and pleasant. Patricia was one of the best I have ever seen. Please give her a big raise!

LIT to DFW - 3 hours late; the entire plane had been boarded before they told us there was a delay due to a weather-related ground stop in Dallas. DFW to MAY - 2+ hours late due to A/C needing to be repaired after everyone had boarded, then when we finally reach the runway, the First Officer timed out and we had to taxi all the way back to the gate and wait for a new one. I arrived in New Orleans 5+ hours later than I should have. Return flights were completely cancelled; rebooked through the app to fly through CLT instead of DFW. MSY to CLT had no issues, but CLT to LIT was delayed 1.25 hrs because flight attendants had not arrived to the airport yet. At least they didn’t make us all sit on the plane to wait for them. I should have driven.

Tray table was filthy when I sat down. I needed to have someone come clean it because there was food and stains on it WiFi didn’t work after paying for in-flight WiFi. Food was terrible and was not filling at all Chicken was rubbery Flight attendant had an attitude, interrupted me and wasn’t able to answer basic questions about the food selection such as “does the chicken have red sauce in it”. If your flight attendants are not going to know what is in the meals so we can make an educated decision based on dietary restrictions, they shouldn’t be on the plane. My 1.5 year old niece was sleeping and dropped her binkie. I went on the ground under the chairs looking for it. It was at that time that she came up to me as I’m CLEARLY on all 4s with a flashlight and said “I need to get by”. I said one moment please I’m getting something from under the seat (while my head was literally under the seat). Her reply was “no you need to move now” and proceeded to almost push me out of the way. I looked up and all I saw was her toes under my eyes. When I looked in front of me, her private parts were inches away from my face. I then made a comment “you couldn’t waited 2 seconds?” and her response was, “no I need to use the bathroom”. I understand that and would never want to be the reason someone couldn’t get to the bathroom but I was under the seat. She could’ve gone around the other way instead of harassing me, basically placing her private parts on my head and borderline pushing me out of the way. You don’t pay that much for this deplorable experience. This was by far the worst experience I have ever had on American. I will be absolutely thinking twice and thrice about flying American Airlines again. I would rather pay more to fly delta because at least I know their WiFi will work and their flight attendants won’t have a shitty attitude for no reason, nor will they act the way this woman did. Unacceptable.

Liked - nothing. Disliked - delayed 35+ min sitting on the plane. Caused me to miss my connection in Charlotte. American Airlines is the worst US Air Carrier company with atrocious customer service.

Worst situation ever! I booked my tickets for this trip on Alaska Airlines. I guess AA is a partner and we flew nonstop from Eugene to PHX on an AA jet. I had to pay for luggage from PHX to EUG. And this was an Alaska Airlines reservation paid for with Alaska airlines credit card! Got to the PHX airport and was not able to check bags because of some weird issue with the AA software. My reservation had to be the-entered by the agent. I will never pick another American Airlines flight on the Alaska Airlines website. While on vacation, I tried to upgrade our seats for the trip home. The request just buffered and never went through. I tried four times and was charged four times on my credit card. The card was charged but the seats were never changed. What a wreck!

Left from gate 30 minutes before flight. Never been late to a flight ever. It says 15 minutes before explicitly on the ticket.

They were flexible and let my daughter and I sit in the back of the plane.

A flight attendant appeared to not be in a good mood that served us; felt she was being short. Overhead announcements were very loud compared to other airlines and the message was not friendly and was a little confusing. This flight was particularly over all was not satisfying compared to previous Sun Country flights.

Airlines should have to add their fees to their fares

I am upset with the hidden fees for bringing on an overhead carryon onto flight and also having to pay for my seat selection. This should all be part of the original price of the ticket. Very poor customer service

Sun country Wi-Fi was not working. Flight was overbooked by two people. Had to pay extra for carryons day before flight and I don’t like hidden fees like that.

WiFi did not work. Woman flight attendant in the rear of the plane was moody.

Flight delayed over 3 hrs due to unexplained issue. No text message to notify.

Well we did not realize at first it was a ground transfer, but we really enjoyed it and would definitely recommend to friends and family. Our driver was awesome and the ride was wonderful. A bathroom on board would have been nice, but at least we were warned that there wasn't one so we went ahead of time.

We were on a fairly long flight and they offered nothing for a snack (unless you paid) and then quickly gave you a drink and were never to be seen again. I would have loved a refill on my water but that was not an option. The flight attendants were standing on ther phone when we boarded and left and never even greeted us. Any other flight I have been on they would have welcomed us on the plane and again greeted us as we got off. Our landline transfer from MSP to Rochester on the other hand was FANTASTIC! We would highly recommend!

Took forever to get the plane loaded and unloaded. Longest I have ever had. I was in the middle of the plane and it almost took a hour after landing to get off of the plane.

Book cheap flights from Portland to Seattle

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Portland to Seattle found on KAYAK in the last 72 hours.
8/21Wed
2 stopsAmerican Airlines
11h 41mPWM-SEA
$104
9/24Tue
1 stopUnited Airlines
9h 13mPWM-SEA
$114
8/26Mon
1 stopDelta
9h 17mPWM-SEA
$118
6/22Sat
1 stopSun Country Air
11h 58mPWM-SEA
$140
6/22Sat
1 stopSun Country Air
11h 58mPWM-SEA
$143
8/21Wed
1 stopUnited Airlines
9h 20mPWM-SEA
$164
6/8Sat
1 stopAmerican Airlines
10h 19mPWM-SEA
$179
6/18Tue
1 stopDelta
25h 48mPWM-SEA
$312
9/24Tue
3 stopsWestJet
29h 27mPWM-SEA
$398
6/8Sat
3 stopsWestJet
30h 19mPWM-SEA
$470

Search by stops

Search by airline

Search by price

Last minute flights from Portland 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 Portland to Seattle that are departing in the next 10 days.
5/24Fri
multi-stopAmerican Airlines
10h 10mPWM-SEA
5/27Mon
multi-stopAmerican Airlines
10h 42mSEA-PWM
$694
5/24Fri
multi-stopAmerican Airlines
10h 10mPWM-SEA
5/27Mon
multi-stopAmerican Airlines
10h 43mSEA-PWM
$699
5/24Fri
multi-stopAmerican Airlines
12h 42mPWM-SEA
5/27Mon
multi-stopAmerican Airlines
10h 43mSEA-PWM
$706
5/24Fri
multi-stopDelta
9h 14mPWM-SEA
5/26Sun
multi-stopDelta
10h 31mSEA-PWM
$992
5/24Fri
multi-stopDelta
10h 20mPWM-SEA
5/26Sun
multi-stopDelta
10h 02mSEA-PWM
$997

Search by stops

Search by airline

Search by price

Portland - Seattle Flights

Departure:

Portland (undefined)United States

Destination:

Seattle (SEA)United States

Return flight deals:

Seattle - Portland

Cabin classes: