$126 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 4/14. 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
1 adult, Economy, 0 bags

KAYAK searches 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
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Cheap Flights from Dulles Intl to Idaho

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Boise
Boise1 stop$251
Idaho Falls
Idaho Falls1 stop$354
Hailey
Hailey1 stop$359
Lewiston
Lewiston2 stops$443
Twin Falls
Twin Falls2 stops$572
Pocatello
Pocatello2 stops$583
Spokane
Spokane1 stop$251
Boise
Boise1 stop$251
Idaho Falls
Idaho Falls1 stop$354
Hailey
Hailey1 stop$359
Lewiston
Lewiston2 stops$443
Twin Falls
Twin Falls2 stops$572
Pocatello
Pocatello2 stops$583
Spokane
Spokane1 stop$251

Book Cheap Dulles Intl to Idaho Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Dulles Intl to Idaho 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 for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Dulles Intl to Idaho

Tue, Apr 28 - Sat, May 2
Delta Logo
7:00 am - 1:12 pm
IAD
-
BOI
8h 12m
1 stop
Delta Logo
1:52 pm - 11:55 pm
BOI
-
IAD
8h 03m
1 stop
$251Delta
Tue, Apr 21 - Tue, Apr 28
Delta Logo
7:00 am - 12:27 pm
IAD
-
GEG
8h 27m
1 stop
Delta Logo
6:00 am - 5:57 pm
GEG
-
IAD
8h 57m
1 stop
$251Delta
Tue, Apr 14 - Sat, Apr 18
Delta Logo
11:04 am - 8:29 pm
IAD
-
BOI
11h 25m
2 stops
Delta Logo
1:52 pm - 11:55 pm
BOI
-
IAD
8h 03m
1 stop
$256Delta
Tue, Apr 21 - Tue, Apr 28
Delta Logo
6:00 am - 1:04 pm
IAD
-
GEG
10h 04m
1 stop
Delta Logo
7:38 pm - 12:05 pm
GEG
-
IAD
13h 27m
2 stops
$256Delta
Wed, Mar 18 - Tue, Mar 24
American Airlines Logo
6:00 am - 12:48 pm
IAD
-
BOI
8h 48m
1 stop
American Airlines Logo
6:33 pm - 8:48 am
BOI
-
IAD
12h 15m
2 stops
$284American Airlines
Tue, Apr 28 - Tue, May 5
Alaska Airlines Logo
6:47 pm - 3:33 pm
IAD
-
BOI
22h 46m
2 stops
Alaska Airlines Logo
6:00 am - 6:20 pm
BOI
-
IAD
10h 20m
1 stop
$292Alaska Airlines
Fri, Apr 17 - Wed, Apr 22
Alaska Airlines Logo
7:11 pm - 10:21 am
IAD
-
BOI
17h 10m
1 stop
Alaska Airlines Logo
6:00 am - 12:09 am
BOI
-
IAD
16h 09m
1 stop
$303Alaska Airlines
Wed, May 27 - Tue, Jun 2
United Airlines Logo
5:55 pm - 11:51 pm
IAD
-
GEG
8h 56m
1 stop
United Airlines Logo
1:41 pm - 12:45 am
GEG
-
IAD
8h 04m
1 stop
$311United Airlines
Wed, May 6 - Sat, May 9
American Airlines Logo
7:00 am - 12:41 pm
IAD
-
JAC
7h 41m
1 stop
American Airlines Logo
1:25 pm - 11:26 pm
JAC
-
IAD
8h 01m
1 stop
$349American Airlines
Sat, Mar 21 - Thu, Mar 26
United Airlines Logo
9:00 am - 11:40 am
IAD
-
JAC
4h 40mnonstop
United Airlines Logo
2:33 pm - 11:20 pm
JAC
-
IAD
6h 47m
1 stop
$356United Airlines
Booking Insights

KAYAK's insights & trends for Dulles Intl to Idaho flights

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. Dulles Intl Airport to Idaho, 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 Idaho is May, when tickets cost $304 (return) on average. On the other hand, the most expensive months are February and June, when the average cost of round-trip tickets is $552 and $487 respectively.

Good to know

Low seasonNovember
Cheapest flight$126
Best time to beat the crowds with an average 38% drop in price.
Most popular time to fly with an average 17% increase in price.
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.

Reviews of the 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.
8.0
Alaska AirlinesOverall score based on 11937 reviews
8.1Boarding
7.8Comfort
7.0Entertainment
7.1Food
8.5Crew
Airline reviews

Flight cancelled and deplaned. Rescheduled 8 hours later at a different airport. Ended up at destination but late.

6.0 GoodAnonymous, Feb 2026
DCA - SAN
Read more Alaska Airlines reviews

Flight cancelled and deplaned. Rescheduled 8 hours later at a different airport. Ended up at destination but late.

Flight was scheduled to leave at 6a and delayed for 5 hours due to “mechanical” issues. Everyone else on the flight received an email voucher for $24 of food for the delay, except for our group. Also the carry on luggage bins were full and the crew requested that everyone to pass their carry ons back up to the front while everyone was still standing. They gave no other direction and kept rushing the process. After all bags were sent up, they then asked for seat #s to go with each bag… They should have probably had everyone get to their sits and then pass the bags up in a controlled process.

From Las Vegas to Boise all went well. However, our flight was delayed in Boise and I missed my connecting flight from Seattle to Pasco. Moreover, the last flight to Pasco was full and I was booked on the 11:30 flight Sunday and given a hotel accommodation. However, I was scheduled to deliver the Sunday morning service at my church and needed to arrive no later than 10:00. Therefore, I booked a Delta flight scheduled to arrive in Pasco at 23:09. My piece of luggage checked in Las Vegas arrived in Pasco earlier today. I waited at the airport for over an hour last night to speak with an Alaska agent to no avail. I went back after church this morning in search of my piece of luggage and it could not be located. After waiting for 40 minutes to speak to the agent authorized to take my claim, he announced that he was closing the counter to assist on the flight line but not before providing me with a telephone number that would help me with filing my claim. Before I was able to make the call (due to other factors) I received a call from Alaska agent informing me that my luggage had just arrived and I am now waiting for it to be delivered. I deliberately took the more complicated route home to ensure that I would be home in plenty of time to prepare for myself for the Sunday service and accommodate my relatives’ needs. I believe the airport is undermanned given the number of flights coming in and going out. It was fiasco last night with three flights waiting for luggage and another flight landing within minutes. Today’s problems stemmed from a lack of cross training and a serious amount of cargo/baggage going out and too few people scheduled to cover.

The seats are very small. I’m 5’ 3”, so don’t think I should notice. The food selection was non existent and very disappointing. 5 hour flight plus TSA, etc. I would have appreciated a small salad, crudités. Something fresher not just chips.

We appreciated that the flight attendant came through 3 times with drinks or water on the long flight..I was also glad that they were separating out recycling! I would have liked a 12oz sofa can instead of 7oz, but that's a minor quibble. The knee space in economy was also better than most of Alaska's competitors.

I liked the free snacks and drink. I liked the onboard entertainment. I did not like the WiFi cutting out in middle of my movie.

Flight from LAX to STS das excellent. Flight from DCA to LAX was troubled by the previous flight returning to the one DCA gate putting our flight in jeopardy. However another gate was arranged and that flight was a bit late, but was handled exceptionally.

Boarding process was poorly handled by the gate crew and the onboard crew. No effort was made to provide equal treatment to passengers with overhead bin space. Crew seemed disengaged and unfriendly.

Awesome. Great flight. Super nice people and I like the extra space

On time, WiFi worked, reasonable legroom, helpful staff. Unfortunately there was no water for handwashing in the rear lavatory.

I have not flown Southwest in awhile and had a very pleasant experience. From ticketing to boarding to the flight. The flight left on time and landed ahead of schedule. It won't be so long next time!!

The Southwest experience has definitely taken a dive from its early days. You can no longer deferentiate from other airlines. Air travel is too expensive. Southwest is no longer budget friendly. They have lost me as a loyal customer.

Flight was hours late, unable to sit next to spouse, I have had so much better experiences. Substantially better, only saving grace was that it was a short flight.

An entire day of delays. Cost lots of money. Meals and a hotel.

The WiFi and crew on the plane were good, however, the boarding experience was awful. I paid for the Choice Preferred and was boarded in group 5 so all overhead storage was full. They found room for our luggage, but further back making getting off the plane a nightmare. Also, we were in row 6 and the seats were extremely uncomfortable. Both my daughter and I had no leg room and couldn’t wait to get off the plane.

The charges were ridiculous for an hour flight and the turbulence was very scary.

Still need to work out the kinks on the new assigned seating boarding process. Otherwise, a very good flight.

WiFi did not work. Boarding with the new seating assignments took too long. The temperature in the terminal was obnoxious. +/- 80°

The seats are now more narrow. I paid for front row the seats in the front are even more narrow than before.

Only downside was the legroom and seat width, which is always a problem unless I spend more for a premium seat.

2+hrs delay without any reason provided and a cramped flight

We waited an hour on the runway to get a gate in Orlando

Flight was delayed by 3-hours and their fix was… complimentary pretzels.

Flight was delayed due to crew being not on time

Flight crew issues delayed my flight by 2 1/2 hours. Causing me to miss my connection.

The staff on board and gate was nice - a welcome change from the usual. We also arrived early, which was a great benefit, given that it takes 30 minutes plus to get bags at SRQ.

The staff was frielndly. The plane was terrible, it was too small and should be decommissioned. There were no back seat screens at all. The only beverages we had a choice from was coffee, tea or water. The only bathroom in the back was behind the flight attendant's jump seat and wasn't working. And I literally felt like I was sitting on top of the guy next to me. It was terribly hot in the plane and we had to sit on the tarmac in Chicago for 1/2 hour due to congestion in Mpls. Wouldn't they have know that before they even boarded us so that we could have sat in comfort in the terminal?

Never got on it. Was re-routed through Detroit and am still in airports 12 hours later waiting for my connecting plane to arrive.

Delta has too many delays now days. It is 1:06 am now. I was supposed to land in Norfolk at 10:30 pm. I got re-booked through Detroit and I’m still in Detroit. I hope to be landed in Norfolk by 3am. I’ve been in airports for 12 hours as of right now. There is a weather delay now but most delays lately have been maintenance.

Very Very late. Subsequent flights left an hour before ours

Wifi took a while to kick in and we had a maintenance issue that took over 40 mins at the gate in Washington before pulling back

Very good. Because of the delays with my previous flight, I missed my connection, but I was able to book another flight through the United app easily.

Was happy we finally got upgraded in 1st class. The seat getting old. The cushiness need some improvement.

Ineffective communication with United resulted in lost baggage. Their Baggage Tracing counter at MUC was shut down from 11:00-14:15 on my arrival. Undertrained, underinformed staff had me Running all over MUC to find someone to help me to no avail. Staff was rude, unhelpful, and unable to effectively use the systems they did have operational. They refused to contact United in any way or provide any accommodation or other resources while I waited for my luggage. This has destroyed my downstream itinerary. If they had even the slightest visibility I may have been able to reschedule/plan, but again, their staff provided nothing, and did nothing more than their website, which doesn’t even work on a standard phone browser. Miserable failure at all levels that weren’t associated with the operation of the aircraft.

Sat next to a one year old. She crawled all over the place and made me laugh.

The Crew and the food was the worst I ever had in Business Class. First they told us there were no space for carry on. It was plenty of space over our 2 row seats, we had to ask to let us travel with it which was accepted. They were aware that we had to run for the connection due to the previous flight delay. Have us one hour waiting for more customers and not even offer a glass of water. Then started the service and they started to serve other passengers drinks in business and did not offer any drinks until they serve our pre ordered meal and I ask for something to drink. I had to wait until they finished to serve all passengers until Inget something. The crew was the worts I ever had for Business Class in my life.

Not great experience - we were super late boarding due to issues with aircraft. Then when we finally all got onboard and seated and they started taxiing out to the runway they just stopped then turned around and went back to the airport. Apparently the crew “ran out of time” to legally fly us. They mentioned that they were about 2 minutes away from taking off. I understand the rules and safety but kinda wonder why they would have bothered boarding us in the first place? Had to go all the way back and de plane and then wait in a HUGE line to get a hotel (this is somewhere around 2:30am) finally got to hotel by Uber (no shuttle after 20min so gave up) and they ended up putting us all back on the same aircraft at 10am next morning so got about 2.5 hours sleep. They did give us. $250 credit, but it was a São Paulo Brazil flight out of Dulles. The flight and everything was fine.

Starlink wifi on the Embraer E175 is an excellent experience. I was able to connect and work from IAD all the way to approach into BTV.

7 hours delayed due to operational issues on United’s end. Basically laziness.

Short flight but an "eager to help" crew made the journey more enjoyable!

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

Information on your arrival and departure airports