$121 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 9/25. 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

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$268
Idaho Falls
Idaho Falls1 stop$394
Hailey
Hailey1 stop$431
Twin Falls
Twin Falls1 stop$518
Pocatello
Pocatello1 stop$457
Spokane
Spokane1 stop$277
Boise
Boise1 stop$268
Idaho Falls
Idaho Falls1 stop$394
Hailey
Hailey1 stop$431
Twin Falls
Twin Falls1 stop$518
Pocatello
Pocatello1 stop$457
Spokane
Spokane1 stop$277

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, Oct 21 - Tue, Oct 28
United Airlines Logo
6:30 am - 11:20 amIAD-JAC
6h 50m1 stop
United Airlines Logo
2:40 pm - 11:15 pmJAC-IAD
6h 35m1 stop
$224United Airlines
Find Deal
Wed, Nov 5 - Sat, Nov 8
American Airlines Logo
6:04 am - 12:16 pmIAD-JAC
8h 12m1 stop
American Airlines Logo
1:06 pm - 10:28 pmJAC-IAD
7h 22m1 stop
$259American Airlines
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Tue, Sep 9 - Thu, Sep 11
 Logo
7:00 am - 3:00 pmIAD-BOI
10h 00m1 stop
 Logo
12:22 pm - 9:17 amBOI-IAD
18h 55m2 stops
Sat, Oct 11 - Sat, Oct 18
 Logo
9:38 pm - 11:43 amIAD-BOI
16h 05m2 stops
 Logo
1:35 pm - 12:23 amBOI-IAD
8h 48m1 stop
Tue, Sep 16 - Tue, Sep 23
Delta Logo
7:05 pm - 11:58 pmIAD-GEG
7h 53m1 stop
Delta Logo
5:30 pm - 6:01 amGEG-IAD
9h 31m1 stop
$277Delta
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Tue, Sep 16 - Tue, Sep 23
Delta Logo
7:35 am - 12:37 pmIAD-GEG
8h 02m1 stop
Delta Logo
5:03 pm - 9:09 amGEG-IAD
13h 06m2 stops
$282Delta
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Wed, Sep 10 - Sat, Sep 20
Alaska Airlines Logo
6:09 pm - 12:19 amIAD-GEG
9h 10m1 stop
Alaska Airlines Logo
7:44 pm - 7:33 amGEG-IAD
8h 49m1 stop
$287Alaska Airlines
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Tue, Sep 9 - Thu, Sep 11
Alaska Airlines Logo
7:00 am - 1:48 pmIAD-BOI
8h 48m1 stop
Alaska Airlines Logo
8:18 pm - 4:52 pmBOI-IAD
18h 34m1 stop
$289Alaska Airlines
Find Deal
Tue, Nov 25 - Tue, Dec 2
Southwest Logo
7:50 pm - 12:40 amIAD-BOI
6h 50m1 stop
Southwest Logo
11:45 am - 10:10 pmBOI-IAD
8h 25m1 stop
$423Southwest
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Wed, Nov 26 - Tue, Dec 2
Southwest Logo
5:00 am - 4:50 pmIAD-BOI
13h 50m2 stops
Southwest Logo
11:45 am - 10:10 pmBOI-IAD
8h 25m1 stop
$428Southwest
Find Deal
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’s the cheapest day of the week to fly from Washington Dulles Airport to Idaho?

The average price of all round-trip flights from Washington, D.C. Dulles Intl Airport to Idaho clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to Idaho on a Wednesday, as we generally find the cheapest rates on that day for this route. On the other hand, Monday is the most expensive day to fly from Washington Dulles Airport to Idaho. For your return ticket, we recommend flying on a Saturday and avoiding Mondays for the best deals.

Good to know

Low seasonJanuary
Cheapest flight$121
Best time to beat the crowds but there is an average 35% increase in price.
Most popular time to fly with an average 11% 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.

  • What is the cheapest time of day to fly to Idaho?

    The cheapest time of day to fly to Idaho is generally in the afternoon, when round-trip flights cost $431 on average. Morning departures are around 6% cheaper than evening flights, on average. The most expensive time of day to fly to Idaho is generally at night, which is peak travel time and where the average cost of a ticket is $671.

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 10000 reviews
8.5Crew
7.8Comfort
7.0Entertainment
7.1Food
8.1Boarding
Airline reviews

My husband unfortunately had a very large lady next to him who did not fit in the seat and had to have the armrest up so she was partially in his seat and she also had horrible BO

4.0 OkayAnonymous, Jul 2025DCA - SEA
Read more Alaska Airlines reviews

My husband unfortunately had a very large lady next to him who did not fit in the seat and had to have the armrest up so she was partially in his seat and she also had horrible BO

The Boeing 737 plane is old with narrow seats and tiny lavatories. The flight was delayed for over 2 hours. The flight attendants were discourteous.

They were friendly, efficient and got our bags to us so fast at the end of the flight.

Only offered water, no snacks provided, and it was cold on the plane, everyone was wearing sweatshirt or jacket in June. I asked for blanket, but crew said they didnt have anything and would turn the heat up, that didn't happen, so for 6 hours I remained cold.

One of the stewardess, Tre, went above and beyond to ensure my comfort!

It was too cold for the first quarter of the flight.

I loved that we boarded orderly and quickly, that I had an opportunity to check my bag free at the gate, that there was plenty of seat/leg room, there was smooth takeoff and landing, the attendants were pleasant and helpful, and that we arrived on time!!

In GEG I arrived at 0930 for a 1600 flight. Alaska had a rule that you could not check your bags until 4 hours before flight time. I was forced to sit in a chilly lobby for hours. I had access to a bathroom, but could not go into terminal for food and drink. Boarding and flight OK

Despite boarding starting quite late, we actually got to LAX on time. Boarding was easy and orderly. We knew that no screen with entertainment choices would be included on this flight, and that's fine. It was the best price, and we brought all the types of entertainment we needed with us, and appreciated the USB charging ports. What stood out most, was the complimentary liquor. THAT made the biggest difference in our enjoyment of this flight.

I made a mistake. Read what I wrote in the flight from Dulles to SEA. The negative experience was from SEA to BOI. Total garbage. Wont do it again.

Near 4 hour flight with only 1 service. Had to use call button to request water. Internet and power not working until into flight. Internet would stop working during flight.

Southwest's seats are the least comfortable I have ever sat in.

The cabin was quiet for the redeye flight. The area was clean. The staff was great. The 787 Max was in good condition. Drawbacks were that the seat widths were tight for some passengers. The seat padding was at best average and for a long flight uncomfortable.

Southwest like most American domestic airlines, is a mediocre airline. But it is among the cheapest. Oh well.

My flight was delayed 50 minutes and we were rushed to board to then sit for 15 minutes until the pilot arrived. Unacceptable since we could have waited to board. Also the delayed flight was updated AFTER we boarded to more than the 10 minutes as originally stated.

Other than a bit of a delay, everything was good. Again, the boarding process and picking seats is the only thing I don't enjoy.

If we are going to have to pay for luggage, make it easier to do. Put something on the app during check-in so I don't need to do it at the kiosk. I've done it twice recently and I ended up having to pay at the desk because something went wrong at the kiosk in Tampa.

southwest just starting charging for luggage. hadnt realized it until it was too late. now out $70 when i couldve bought a carry on if i wouldve known. free bags was one of the only reasons i chose southwest over another airline (the other being no assigned seats, which is apparently also being changed). stupid business decision. wont be flying southwest anymore.

The quality of Southwest Airlines continues to degrade each time I fly with them. If it were not for the free luggage, I would probably choose another airline. Their prices are a little bit competitive, but way too high for the quality of the service. Southwest is not unique in this way. Domestic flight in the United States of America has continued to be a lower and lower quality product. Very sad when you compare the quality of domestic airlines to that of many international airlines around the world.

Very smooth checking in our luggage with a super pleasant SW agent. I enjoyed a fun entertaining movie.

Three seats in first class were broken and while they were able to still acommodate us it was looking very touch and go and they had others they could not acommodate

Mechanic delay in addition to a 2 hour change in takeoff time was frustrating.

Delayed due to thunderstorms and no in-flight service due to rough weather — both of which are out of Delta’s control. Flight was good overall.

The flight attendants in SLC were rude. I arrived 40 minutes early to gate. Ticket said I needed check in for seat assignments and tried check in and attendants said they weren’t doing it. And proceeded to never call me to give me a ticket so when time to board I received the very last seat. Please relay to employees to do their job better..,

On this flight I felt the food offering was not as complete as on previous flights. The tomato salad was a bit off and there was nothing additional such a bread or butter. The breakfast was only one option, so you either ate what they had or ate nothing. The crew was efficient, but most seemed frustrated throughout the flight. The flight arrived early and was obstacle-free, so I’m overall quite happy, but the shine in the rest of the experience just wasn’t there.

The seats got pretty uncomfortable pretty fast. The armrests are bigger than on other planes, so I had less room in the actual seat. My butt hurt by the end of the flight. :/ comfort was the primary issue. The crew were fantastic!

I believe that a four-hour trip should have a meal. Delta had none.

Great flight with Delta! Boarding was quick and easy, the amenities were solid, and the plane was in great shape. The flight attendants had a fun, lively energy while staying professional. All in all, a smooth trip — even managed to catch up on some rest. Thanks, Delta!

I was uncomfortably cold on the plane. Other than that it was uneventful and therefore as enjoyable as a plane ride can be.

There was supposed to be a meal served, but there wasn’t and the major toilet was out of order

I understand stuff happens, but plane failures are likely due to lack of maintenance. Additionally, air conditioning wasn't working, no snack/drink service, no WiFi. Fortunately, the crew was communicative and light-hearted. United grabbed another plane and we were able to get to our destination.

There was no food available for this red eye... one little waffle cookie for a 6+ hour flight... thank God I was able to sleep some

It is clear that someone knew, and competent, is in charge of food at United Airlines at least for the international flights. I was flying in coach, but the choices of the dinner were excellent. Tasty, and appropriate size. I had the beef, which was a little bit like a shepherds pie, and it was good. Nothing comparable has been served on a United flight in years. It will not be confused with three star food, but it is very good for airline food. Even better was the breakfast choice between a cinnamon roll and a breakfast sandwich. I chose the breakfast sandwich which was absolutely delicious and which I would happily order again at my local Starbucks or Panera. It is clear that someone knew indifferent is in charge of the food and it’s about time.

Flight was delayed 3 hours. No food and drink vouchers was provided. They offered a mini pretzel bag and water .

Staff was rude. Didn’t give water for 2 hours. Worst service

Was on time until within 1 hour of flight-how does that happen? Staff very friendly.

I liked the choice of lemon ginger tea. I think stewardesses can be more considerate of older people needs.

We were given vouchers we couldn’t use with a 5.5 hour delay

I fly UAL 7-8 times per year. This flight was not up to snuff because it boarded very late "due to unexpected delays in restocking the plane" and yet Flight Aware showed the plane had landed some 10 hours earlier--so I think they could have planned accordingly. The FA's were nice but harried. The video system had to be rebooted 3-4 times. The food service was rather abrupt; they forgot my row and when I asked for my meal, they brought it with some impatience. Overall, the flight was fine, but the little details made it feel somewhat mundane and hurried.

I didn’t get on plane. Passport being processed by consulate with visa application. Tried to cancel through underpricer after purchasing cacelling for any reason. No dice, they are thieves.

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