$151 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 3/4. 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 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
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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$301
Idaho Falls
Idaho Falls2 stops$391
Hailey
Hailey1 stop$381

Good to know

Low season

January

High season

August

Cheapest flight

$151
Best time to beat the crowds but there is an average 21% increase in price.
Most popular time to fly and prices are also 17% lower on average.
Flight from Washington Dulles Airport to Boise

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 December. The cheapest month to fly from Washington, D.C. is January.
  • Morning departure is around 35% 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 9706 reviews
7.9Comfort
7.1Food
7.1Entertainment
8.5Crew
8.2Boarding
Airline reviews

All 4 members of my family found the seats terribly uncomfortable. 2 of us suffered from back issues the next few days.

2.0 MediocreAnonymous, Jan 2025DCA - SFO
Read more Alaska Airlines reviews

All 4 members of my family found the seats terribly uncomfortable. 2 of us suffered from back issues the next few days.

There wasn’t any entertainment nor food serve on our flight due to the short flight duration

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.

Great service. Great staff. Boarding was a little slow, but I think there was a service dog slowing things down.

Flight left early and arrived early. the whole trip was excellent.

Seats were really tight and the seat belts did not give enough slack.

I like in St George and prefer to fly out of CDC than SGU. Hopefully, they will continue the flights out of Cedar

Broken jer bridge. Poor communication about it. Lost 2 of 4 luggage pieces

Overall, it was okay. Seat was a little cramped. Would’ve liked more substantial snacks or opportunity to buy some.

Newer plane, relatively easy boarding, not a full flight and was told that we could not be moved up because of weight and balance issues. Otherwise, a very good experience.

Other then mechanical/ computer problem and 3.5 hours flight delay the flight was great. I guess that what happened when you fly an old airplane now a day.

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?

Maybe add a seat trade app for flyers that didn’t get seats together

I completely missed my flight because the first leg was longer than planned. I had to sleep overnight in the airport because no accommodation was provided and then sent to Trinidad in the morning with an anticipated 7 hour layover before my flight to Georgetown which was now with Caribbean Airlines. I tried twice with customer service to see if they could put me on an earlier flight which had seats available but was told it wasn’t possible.

First class felt like economy, seats were horrible, food was horrible, staff inattentive

EVen warmer in the plane it think it was 24+ degrees

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.

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.
4/23Wed
1 stopDelta
10h 59mIAD-BOI
4/29Tue
1 stopDelta
8h 33mBOI-IAD
$301
2/18Tue
2 stopsDelta
8h 42mIAD-BOI
2/21Fri
1 stopDelta
6h 17mBOI-IAD
$306
2/3Mon
1 stopUnited Airlines
9h 39mIAD-GEG
2/6Thu
1 stopUnited Airlines
7h 39mGEG-IAD
$307
3/11Tue
1 stopAmerican Airlines
7h 42mIAD-JAC
3/18Tue
1 stopAmerican Airlines
7h 21mJAC-IAD
$327
4/22Tue
1 stopAlaska Airlines
9h 17mIAD-BOI
4/29Tue
1 stopAlaska Airlines
7h 17mBOI-IAD
$332
4/22Tue
1 stopAlaska Airlines
9h 17mIAD-BOI
4/25Fri
1 stopAlaska Airlines
8h 44mBOI-IAD
$335
3/11Tue
2 stopsAmerican Airlines
10h 31mIAD-JAC
3/18Tue
2 stopsAmerican Airlines
9h 12mJAC-IAD
$337
2/25Tue
2 stopsSouthwest
14h 25mIAD-BOI
2/27Thu
1 stopSouthwest
9h 05mBOI-IAD
$355
5/10Sat
1 stopUnited Airlines
9h 11mIAD-GEG
5/13Tue
1 stopUnited Airlines
7h 36mGEG-IAD
$358
5/13Tue
1 stopSouthwest
6h 50mIAD-BOI
5/20Tue
2 stopsSouthwest
11h 55mBOI-IAD
$416

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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.
3/4Tue
1 stopDelta
9h 21mIAD-BOI
$151
2/8Sat
1 stopAlaska Airlines
7h 46mIAD-GEG
$153
4/1Tue
1 stopDelta
9h 49mIAD-GEG
$154
3/4Tue
2 stopsDelta
13h 49mIAD-BOI
$156
7/13Sun
1 stopSun Country Air
7h 16mIAD-BOI
$178
2/21Fri
1 stopAmerican Airlines
10h 38mIAD-JAC
$198
4/25Fri
1 stopAlaska Airlines
9h 17mIAD-BOI
$229
2/3Mon
1 stopAmerican Airlines
10h 07mIAD-JAC
$300
6/5Thu
1 stopUnited Airlines
9h 43mIAD-JAC
$327
7/5Sat
1 stopUnited Airlines
9h 43mIAD-JAC
$337

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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.
1/23Thu
multi-stopUnited Airlines
10h 07mIAD-JAC
1/29Wed
multi-stopUnited Airlines
14h 30mJAC-IAD
$759
1/23Thu
multi-stopDelta
9h 18mIAD-JAC
1/26Sun
multi-stopDelta
8h 26mJAC-IAD
$778
1/23Thu
multi-stopDelta
8h 01mIAD-JAC
1/29Wed
multi-stopDelta
9h 12mJAC-IAD
$783
1/24Fri
multi-stopUnited Airlines
6h 47mIAD-JAC
1/26Sun
multi-stopUnited Airlines
17h 03mJAC-IAD
$834
1/23Thu
multi-stopAlaska Airlines
20h 34mIAD-JAC
1/26Sun
multi-stopAlaska Airlines
25h 44mJAC-IAD
$842
1/26Sun
multi-stopSouthwest
8h 45mIAD-GEG
1/30Thu
multi-stopSouthwest
6h 35mGEG-IAD
$877
1/26Sun
multi-stopSouthwest
8h 45mIAD-GEG
1/29Wed
multi-stopSouthwest
12h 15mGEG-IAD
$882
1/24Fri
multi-stopAmerican Airlines
8h 27mIAD-BOI
1/31Fri
multi-stopAmerican Airlines
7h 13mBOI-IAD
$968
1/24Fri
multi-stopAmerican Airlines
9h 59mIAD-BOI
1/31Fri
multi-stopAmerican Airlines
7h 13mBOI-IAD
$973
1/22Wed
multi-stopAlaska Airlines
7h 46mIAD-GEG
1/24Fri
multi-stopAlaska Airlines
9h 57mGEG-IAD
$1,057

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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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