$149 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 4/1. 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$231
Idaho Falls
Idaho Falls1 stop$420
Hailey
Hailey1 stop$396
Lewiston
Lewiston1 stop$720

Good to know

Low season

January

High season

August

Cheapest flight

$149
Best time to beat the crowds with an average 35% drop in price.
Most popular time to fly and prices are also 8% 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 1 week before departure in order to get a below-average price.
  • High season is considered to be February, March and April. The cheapest month to fly from Washington, D.C. is January.
  • Morning departure is around 22% cheaper 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 4 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.
8.1
SouthwestOverall score based on 4411 reviews
8.7Crew
7.1Food
8.1Comfort
8.2Boarding
7.6Entertainment
Airline reviews

Gate agents were informative and friendly… flight attendants were as well. Had a fun time chatting about their legacy AirTran experiences as a former fan of the airline that Southwest acquired.

10.0 ExcellentAnonymous, Jan 2025ATL - LGA
Read more Southwest reviews

Gate agents were informative and friendly… flight attendants were as well. Had a fun time chatting about their legacy AirTran experiences as a former fan of the airline that Southwest acquired.

Flight was awfully bumpy and landing was a bit jolting. I was in the restroom when snacks and drinks were served and was not asked if i wanted any. I had to ask for water finally.

Wi Fi was horrible kept cutting out the whole time and too expensive

I really like open seating. I hate that I've heard this is going away. This is one of the unique things that makes Southwest my goto choice.

Boarding was a little late, but made up for it. It was quick to taxi to the runway, since it's a smallish airport.

Excellent! Only question is how we check in at exactly 24 hours in advance and end up at the end of the B boarding group

Multiple delays and gate changes. Arrived at final destination 6 hours late. All rental cars had been taken.

Employees were kind and funny, as always! Flight was late but no announcements were made for people with tight connections to help them transition quickly. No service due to turbulence.

It was 2 hours 45 minutes late, for no apparently clear reason.

I recently flew Southwest from San Jose to Honolulu. I was very impressed with the flight crew, especially the flight attendant in charge of the front of the plane. She came through the aisle at least five times for drinks and water, and two times for snacks. I have not seen such service since I flew first class. Also, for the first time, they gave us the correct baggage claim number, and the luggage came out quickly. I can't wait for Southwest to have assigned seating! I absolutely hate the Cattle Call boarding procedure and the mad dash to get seats and overhead bins. However, the boarding was efficient.

There was an issue with water that led to us not having potable water onboard. They dumped the onboard water and we were two hours late taking off.

The flight from San Diego to San Jose gate 28A The two persons working there didn’t even turn on the display board. The display board saying to Sacramento. When I asked she was rude and showed the board . Then he realized And changed. Every one was confused because we are running late to catch that flight coming from IAD. Very irresponsible staff.

Great crew, great boarding, old B-list movies, no free meal service, child kicking my seat back all flight long, early arrival, then 40 minute, confused wait for bags.

Appreciate efficiency and early arrivals. Missed video on such a long flight (DCA to SFO).

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

Boarding is, as it always is… horrible. Gate lice. Slow moving zones. Too many people with carry ons

I loved having a most black flight crew during Black History Month; rather by design or accident I appreciated the representation. ❤️

This was the second flight this week with flight attendant Marcus I’m not sure if his last name is Lane or Lang but this guy is awesome. He funny, attentive and his service is 5 stars. Marcus makes business travel more enjoyable !

Although the flight left late, we arrived early. It was one of the quickest boarding and off boarding experiences I’ve had. It was kind of annoying the only drinks they had were water, coffee, and tea. The flight was very smooth, temperature was just right, and flight attendants were friendly.

Lower number on this flight so spaced out passengers. Able to enjoy more room to relax during flight. It was lovely.

Kind staff. Snacks are small but that’s the new normal.

The young man who was our flight attendant in first class was lazy and did not do his job well at all. Never offered drinks upon boarding - actually I take that back... said "are you okay with water" as if I do not want to get you anything else, only passed the snacks around once, got my drink order wrong and then never offered a second round of drinks. He was the worst I have ever seen on Delta and we fly a lot.

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 don’t understand the purpose of the orange “priority” tag on my bag. This tagged, my bag is last or near to the last bag to come down the carousel at IAH.

The tv monitor in front of my seat was not responding. The flight crew reset it and it still didn’t work.

The agents was very rude and they charged me $50 for a carry-on bag saying that it was too big and then I saw someone going on a plane with the same size bag as me

Liked nothing. As per previous segment it was delay delay delay.

Terrible. First of all we were delayed 4 3/4 hours departing Honolulu. As we had to leave our condo and the rental car had to be returned we had to go to the airport. Even though we had a business class boarding pass to Washington, since we did not have business class to Montreal we could not access the lounge without paying a $59 fee each. This does not make sense to us. Since we could not meet our original connection United booked us to Montreal via New York LaGuardia on Air Canada. In Washington a further delay got us into LaGuardia too late to make our connection to Montreal so we were booked on another Air Canada flight 3 hours later. We were originally scheduled to arrive in Montreal at 10:40 and arrived at 19:55. A totally exhausting day, United did not offer a meal voucher or any type of compensation. Air Canada did give us a digital meal voucher. The food in United business class is poor among all meals offered. The pods look nice but are not that confortable. Overall would not fly on United again.

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.

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.
4/5Sat
1 stopDelta
10h 17mIAD-BOI
4/7Mon
1 stopDelta
8h 53mBOI-IAD
$231
4/5Sat
1 stopDelta
10h 17mIAD-BOI
4/12Sat
2 stopsDelta
10h 10mBOI-IAD
$236
4/7Mon
1 stopHawaiian Airlines
8h 52mIAD-BOI
4/14Mon
1 stopHawaiian Airlines
9h 00mBOI-IAD
$239
4/2Wed
1 stopAlaska Airlines
18h 31mIAD-GEG
4/9Wed
1 stopAlaska Airlines
10h 54mGEG-IAD
$296
4/5Sat
1 stopUnited Airlines
7h 02mIAD-BOI
4/7Mon
1 stopUnited Airlines
8h 15mBOI-IAD
$298
3/6Thu
1 stopUnited Airlines
12h 29mIAD-GEG
3/11Tue
1 stopUnited Airlines
6h 37mGEG-IAD
$318
3/6Thu
1 stopSouthwest
7h 20mIAD-GEG
3/11Tue
2 stopsSouthwest
12h 50mGEG-IAD
$342
3/17Mon
2 stopsAlaska Airlines
22h 11mIAD-GEG
3/19Wed
1 stopAlaska Airlines
7h 59mGEG-IAD
$347
4/7Mon
1 stopSouthwest
6h 55mIAD-BOI
4/14Mon
2 stopsSouthwest
14h 05mBOI-IAD
$349
7/8Tue
1 stopHawaiian Airlines
11h 16mIAD-GEG
7/22Tue
1 stopHawaiian Airlines
10h 55mGEG-IAD
$391

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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.
4/1Tue
1 stopDelta
8h 32mIAD-GEG
$149
3/18Tue
1 stopAlaska Airlines
8h 51mIAD-BOI
$150
3/18Tue
2 stopsAmerican Airlines
13h 50mIAD-BOI
$156
3/5Wed
1 stopAmerican Airlines
8h 18mIAD-BOI
$159
3/5Wed
2 stopsSouthwest
14h 25mIAD-BOI
$164
4/25Fri
1 stopDelta
9h 20mIAD-BOI
$180
5/29Thu
1 stopAlaska Airlines
11h 50mIAD-BOI
$191
7/25Fri
1 stopSouthwest
8h 10mIAD-GEG
$220
7/5Sat
1 stopUnited Airlines
7h 05mIAD-JAC
$243
3/4Tue
2 stopsUnited Airlines
17h 25mIAD-BOI
$284

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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.
2/23Sun
multi-stopUnited Airlines
6h 57mIAD-JAC
2/28Fri
multi-stopUnited Airlines
16h 58mJAC-IAD
$756
2/22Sat
multi-stopAlaska Airlines
20h 37mIAD-JAC
3/2Sun
multi-stopAlaska Airlines
25h 43mJAC-IAD
$777
2/22Sat
multi-stopAlaska Airlines
30h 55mIAD-JAC
3/2Sun
multi-stopAlaska Airlines
25h 43mJAC-IAD
$783
2/22Sat
multi-stopUnited Airlines
7h 11mIAD-IDA
2/28Fri
multi-stopUnited Airlines
8h 33mIDA-IAD
$832
2/22Sat
multi-stopDelta
11h 04mIAD-IDA
2/28Fri
multi-stopDelta
14h 24mIDA-IAD
$842
2/21Fri
multi-stopAmerican Airlines
10h 38mIAD-JAC
2/24Mon
multi-stopAmerican Airlines
7h 37mJAC-IAD
$843
2/21Fri
multi-stopAmerican Airlines
21h 22mIAD-JAC
2/24Mon
multi-stopAmerican Airlines
17h 55mJAC-IAD
$848
2/23Sun
multi-stopDelta
12h 38mIAD-JAC
2/28Fri
multi-stopDelta
9h 50mJAC-IAD
$938
2/21Fri
multi-stopSouthwest
8h 15mIAD-GEG
2/23Sun
multi-stopSouthwest
7h 45mGEG-IAD
$973
2/21Fri
multi-stopSouthwest
8h 15mIAD-GEG
2/23Sun
multi-stopSouthwest
14h 40mGEG-IAD
$978

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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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