$139 Find Cheap Flights from Washington Dulles Airport to Idaho

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 Idaho departing on 1/15. 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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Search hundreds of travel sites at once for deals on flights to Idaho

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Idaho, 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 Washington, D.C. to Idaho, as well as popular online travel agencies
In the last 7 days travelers have searched 41,299,237 times on KAYAK, and here is why:

Save 23% or moreCompare multiple travel sites with one search.

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Best Idaho Flight Deals from Dulles Intl

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

Boise
Boise1 stop$340
Idaho Falls
Idaho Falls1 stop$359
Hailey
Hailey1 stop$444
Lewiston
Lewiston1 stop$298
Twin Falls
Twin Falls1 stop$778

Good to know

Low season

January

High season

August

Cheapest flight

$139
Best time to beat the crowds with an average 32% drop in price.
Most popular time to fly and prices are also 13% lower on average.
Flight from Washington Dulles Airport to Spokane

FAQs - booking Idaho flights

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

    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 Idaho.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Washington Dulles Airport to Idaho 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 Idaho?

    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 from Washington Dulles Airport to Idaho with an airline and back with another airline.

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

    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 from Washington Dulles Airport to Idaho up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding cheap flights to Idaho

  • Book at least 2 weeks before departure in order to get a below-average price.
  • High season is considered to be January, February and March. The cheapest month to fly from Washington, D.C. is January.
  • Morning departure is around 2% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

Top 3 airlines serving from Dulles Intl to Idaho

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Idaho. 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 Idaho? 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 9545 reviews
8.5Crew
7.1Entertainment
8.2Boarding
7.9Comfort
7.2Food
Airline reviews

The crew forced all group F passengers to check bags because they said there wasn't enough overhead space, but when we boarded there was TONS of space. I was pretty annoyed by that.

6.0 GoodSara, Dec 2024IAD - SEA
Read more Alaska Airlines reviews

The crew forced all group F passengers to check bags because they said there wasn't enough overhead space, but when we boarded there was TONS of space. I was pretty annoyed by that.

It was great, I just wish the seats were more comfortable

Not sure why the counter agent's couldn't have helped us with our flight change and only gave us a number to reservations. I thought their job was customer service, not "call this number"

We were seated in the middle of a large group of noisy 8th graders

Nobody’s fault but turbulence all the way meant no service and no access to the bathroom,

I never received a full itinerary of my round trip. I only received the outgoing flight on Sun Country to Baltimore. Throughout my stay in the Baltimore area I kept checking for the information on my return trip to Portland, I didn't receive it in timely manner, so I booked another flight. I received the return flight information on the Alaska flight booked via your sight upon returning to my home in Oregon. The cost of my ticket on Price line was $247.27. The flight was Alaska Airline Flight 9. The confirmation number is YWHLPB. Please be advised I purchased Insurance for this flight. The reference number is UVCV4-X4TK9-INS. I respectfully request a refund for the bookings on, AS 507 and AS 1121.The confirmation number is 72058793562147. Thank you for assistance in correcting this matter.

The flight attendants are very friendly and courteous. Excellent service.

Good except for major turbulence around the Rockies. The pilot did an excellent job of controlling the plane. I wish there was a better way to get through that area next time.

It was a good flight, crew members were friendly. The flight was smooth and overall a great experience.

What was the reason for the flight delay? The plane was there in plenty of time!

I was with one of the last zones to board. It was kind of annoying to finally get called to board and my whole section was already on the plane. Clearly they boarded with previous zones. So by the time I got on board, there were no spaces for my luggage above my head. I had to put my luggage 4+ rows behind me, which meant that I had to wait even longer to get off the plane, since I had to wait for those rows to clear the aisle before I could retrieve my luggage and exit the plane. This also held up the plane cleaners, as they couldn't service my row until I cleared it, so they were all standing there waiting for me, while I'm standing there waiting for the other passengers to clear the aisle. Anyways, I wasn't in a rush this time, so I just waited, but I could see that being a problem in the future. Now, I could have checked my luggage, of course, but coincidentally, a friend of mine on the same flight got their luggage damaged (wheel completely knocked off) and was told by the Baggage Attendant in the airport that Delta doesn't "cover wheel damage" on luggage. This was disappointing to hear. I'm glad I didn't check mine through. If it were my luggage, I'd be highly frustrated to hear that. It makes me not want to check my luggage in the future.

The dear was very limited in space. I could put my water bottle in seat basket. Also, there was no inflight entertainment in the delta app?

Typically I give delta excellent reviews. Our flight was delayed 2hrs, I was one of the fortunate ones who were able to get to my connecting flight. Also, annoying that on the connecting flight boarding personnel make me put away a small bag into my carryon. It small enough to put in back pocket seat, why hold me and the line up to just push it into my carryon.

Everything was great. Great service, excellent communication, and early arrival

Delta flight attendants poorly managed the boarding process and overhead storage. My bag was checked last minute and no claim ticket was provided. My bag is now lost. Complete incompetence by all flight crew involved.

Inexpensive, got an exit row aisle aeat with no middle passenger, bought a great breakfast sandwich, flight comfortable & arrived ahead of schedule.

Customer service at the gate in the flight was exceptional. On time. Aircraft and seat was decent. Thanks Delta. 💗

It was terrible, if they ran flights on time it would make a big difference.

Great flight. On-time, comfortable, clean aircraft, and offered snacks pre-flight to plan for a potentially turbulent route. I wish there was Wi-Fi an all Delta Aircrafts but for a short flight this is not much of a problem.

Delta seems to be improving in many areas, except they are super bad with the food available. Bring back normal food service on long flights.

We arrived early and finally made it to our gate almost an hour after.

The flying experience was great. The flight was on time with no boarding issues during a peak travel period. The short cut baggage drop and process was not smooth and efficient at Dulles.

Fast checkin with the self serve terminal, good communication at the boarding gate.

Very friendly staff. The flight was on time. Need a bit heavy covers/blankets. It can get colder with a thin blanket.

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.

Never nice, United Express partners always do an amazing job.

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.

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

Recent round-trip flight deals

 
These are the cheapest round-trip flights from Washington, D.C. to Idaho found on KAYAK in the last 72 hours.
1/18Sat
1 stopDelta
9h 54mIAD-LWS
1/24Fri
1 stopDelta
7h 58mLWS-IAD
$298
1/18Sat
1 stopUnited Airlines
11h 48mIAD-GEG
1/24Fri
1 stopUnited Airlines
6h 40mGEG-IAD
$306
1/18Sat
1 stopDelta
9h 23mIAD-GEG
1/24Fri
2 stopsDelta
10h 40mGEG-IAD
$311
1/18Sat
1 stopUnited Airlines
7h 31mIAD-LWS
1/24Fri
2 stopsUnited Airlines
12h 25mLWS-IAD
$318
1/17Fri
1 stopAlaska Airlines
20h 34mIAD-JAC
1/24Fri
1 stopAlaska Airlines
25h 44mJAC-IAD
$342
2/7Fri
1 stopAlaska Airlines
20h 09mIAD-BOI
2/11Tue
1 stopAlaska Airlines
7h 57mBOI-IAD
$346
1/23Thu
2 stopsAmerican Airlines
9h 59mIAD-BOI
1/30Thu
1 stopAmerican Airlines
7h 13mBOI-IAD
$375
1/29Wed
2 stopsAmerican Airlines
12h 34mIAD-BOI
1/30Thu
2 stopsAmerican Airlines
13h 15mBOI-IAD
$380
2/20Thu
2 stopsSouthwest
18h 00mIAD-BOI
2/26Wed
2 stopsSouthwest
14h 40mBOI-IAD
$468
1/24Fri
2 stopsSouthwest
14h 25mIAD-BOI
1/29Wed
2 stopsSouthwest
14h 40mBOI-IAD
$497

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Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Washington, D.C. to Idaho found on KAYAK in the last 72 hours.
1/15Wed
1 stopDelta
7h 58mIAD-GEG
$139
1/15Wed
2 stopsDelta
8h 35mIAD-GEG
$144
1/18Sat
1 stopAmerican Airlines
8h 27mIAD-BOI
$155
1/28Tue
1 stopDelta
6h 55mIAD-JAC
$157
1/18Sat
2 stopsAmerican Airlines
10h 00mIAD-BOI
$160
1/20Mon
2 stopsAlaska Airlines
22h 20mIAD-BOI
$217
1/18Sat
3 stops
26h 43mIAD-BOI
$235
1/5Sun
1 stopUnited Airlines
7h 03mIAD-BOI
$300
6/14Sat
1 stopAlaska Airlines
18h 01mIAD-JAC
$300
1/3Fri
1 stopUnited Airlines
8h 36mIAD-IDA
$376

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Last minute flights from Dulles Intl to Idaho

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 Idaho that are departing in the next 10 days.
12/20Fri
multi-stopUnited Airlines
10h 40mIAD-JAC
12/28Sat
multi-stopUnited Airlines
6h 55mJAC-IAD
$865
12/23Mon
multi-stopUnited Airlines
11h 59mIAD-SUN
12/26Thu
multi-stopUnited Airlines
6h 54mSUN-IAD
$876
12/23Mon
multi-stopUnited Airlines
16h 04mIAD-SUN
12/26Thu
multi-stopUnited Airlines
10h 35mSUN-IAD
$881
12/23Mon
multi-stopUnited Airlines
16h 04mIAD-SUN
12/26Thu
multi-stopUnited Airlines
12h 54mSUN-IAD
$886
12/23Mon
multi-stopDelta
10h 30mIAD-JAC
12/28Sat
multi-stopDelta
8h 04mJAC-IAD
$922
12/22Sun
multi-stopDelta
8h 44mIAD-GEG
1/4Sat
multi-stopDelta
7h 50mGEG-IAD
$931
12/23Mon
multi-stopSouthwest
8h 55mIAD-GEG
1/2Thu
multi-stopSouthwest
10h 15mGEG-IAD
$934
12/21Sat
multi-stopSouthwest
17h 20mIAD-BOI
1/5Sun
multi-stopSouthwest
16h 55mBOI-IAD
$985
12/24Tue
multi-stopAmerican Airlines
14h 20mIAD-IDA
12/28Sat
multi-stopAmerican Airlines
21h 39mIDA-IAD
$1,630
12/21Sat
multi-stopAlaska Airlines
27h 08mIAD-SUN
12/27Fri
multi-stopAlaska Airlines
32h 39mSUN-IAD
$1,994

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

Information on your arrival and departure airports

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