$120 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 10/14. 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

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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Flight Deals

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$218
Idaho Falls
Idaho Falls1 stop$412
Hailey
Hailey1 stop$440
Lewiston
Lewiston1 stop$435
Twin Falls
Twin Falls1 stop$447
Pocatello
Pocatello2 stops$631
Spokane
Spokane1 stop$221
Boise
Boise1 stop$218
Idaho Falls
Idaho Falls1 stop$412
Hailey
Hailey1 stop$440
Lewiston
Lewiston1 stop$435
Twin Falls
Twin Falls1 stop$447
Pocatello
Pocatello2 stops$631
Spokane
Spokane1 stop$221

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

Thu, Dec 4 - Sat, Jan 10
American Airlines Logo
6:00 am - 12:34 pmIAD-BOI
8h 34m1 stop
American Airlines Logo
1:43 pm - 10:18 pmBOI-IAD
6h 35m1 stop
$218American Airlines
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Tue, Oct 21 - Tue, Oct 28
American Airlines Logo
6:11 am - 11:43 amIAD-GEG
8h 32m1 stop
American Airlines Logo
12:33 pm - 10:51 pmGEG-IAD
7h 18m1 stop
$221American Airlines
Find Deal
Tue, Oct 21 - Tue, Oct 28
Delta Logo
6:15 am - 12:01 pmIAD-GEG
8h 46m1 stop
Delta Logo
11:20 am - 11:33 pmGEG-IAD
9h 13m2 stops
$226Delta
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Tue, Nov 11 - Fri, Nov 14
United Airlines Logo
4:10 pm - 11:29 pmIAD-GEG
10h 19m1 stop
United Airlines Logo
1:47 pm - 11:15 pmGEG-IAD
6h 28m1 stop
$249United Airlines
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Sat, Oct 18 - Tue, Oct 21
Alaska Airlines Logo
6:25 am - 12:37 pmIAD-GEG
9h 12m1 stop
Alaska Airlines Logo
1:31 pm - 12:23 amGEG-IAD
7h 52m1 stop
$251Alaska Airlines
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Tue, Jan 27 - Sat, Jan 31
United Airlines Logo
8:15 am - 1:21 pmIAD-JAC
7h 06m1 stop
United Airlines Logo
2:30 pm - 8:45 pmJAC-IAD
4h 15mnonstop
$269United Airlines
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Sat, Oct 18 - Sat, Oct 25
Delta Logo
7:35 am - 2:57 pmIAD-GEG
10h 22m1 stop
Delta Logo
1:10 pm - 11:33 pmGEG-IAD
7h 23m1 stop
$304Delta
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Wed, Nov 12 - Sat, Nov 15
Southwest Logo
7:40 am - 10:00 pmIAD-GEG
17h 20m2 stops
Southwest Logo
7:00 am - 10:15 pmGEG-IAD
12h 15m2 stops
$308Southwest
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Thu, Dec 4 - Tue, Dec 9
Southwest Logo
5:45 pm - 11:10 pmIAD-BOI
7h 25m1 stop
Southwest Logo
11:45 am - 10:10 pmBOI-IAD
8h 25m1 stop
$309Southwest
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Mon, Oct 20 - Fri, Oct 24
Alaska Airlines Logo
5:42 pm - 11:34 amIAD-BOI
19h 52m1 stop
Alaska Airlines Logo
5:38 pm - 7:33 amBOI-IAD
11h 55m1 stop
$344Alaska Airlines
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$120
Best time to beat the crowds but there is an average 34% increase in price.
Most popular time to fly with an average 13% increase in price.
Flight from Washington Dulles Airport to Jackson

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

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

10.0 ExcellentAnonymous, Sep 2025DCA - SAN
Read more Alaska Airlines reviews

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.

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

I wish they had movie screens in the headrests. The seats are much improved, more legroom and recently renovated. Bathroom was clean. Staff was outstanding!!

As always, the entire Southwest experience was wonderful, from online booking to flight to baggage retrieval. Very grateful.

The weather could have been better. There was a 40 minute ATC delay in SFO because of marine fog and a micro cell storm delayed landing and take-off at Nashville. The gate was changed 5 minutes from boarding from gate B3 to gate C23 at Nashville airport.

After being assaulted by a flight attendant I was then brushed off as oh well because he long braids didn’t mean to whip me in the eye. I have filed complaints and will see. But like any other issue I’ve had with kayak involved it’s been trash. Last time I’ll be using your app

AC sub par. WiFi not working correctly. Ac sucked. Seats very narrow.

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.

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

Really low quality food especially for an international flight. The crew also was surprisingly unpleasant except couple of ladies. I know we were not in first class but that’s no reason to treat customers as less.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

Crew was good. The reservation got mixed up and they didn't have my TSA number. I am also a Silver Medallion and wasn't able to use Sky Priority.

Delta made it easy, comfortable and timely. The crew was fantastic.

This route with Delta always has delays or is cancelled. Aircrafts seem smaller and older. I fly Delta quite a bit - haven’t had issues with the international flights. But this route has always been the troublesome one

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..,

Great service on board. Boarding a bit slow due to process. Food was pretty average.

Very small cramped plane for an international flight. Everything else was good, but it was maybe the smallest comfort-wise I've ever been on for longer than 3-4 hours and the trip was 7.5

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.

When I booked it on Kayak it aaid that I wasn't allowed hamd luggage. I called United Airlines and it took them 6 minutes to figure out if I was allowed free hand luggage. Surely something that simple they should be able to tell me instantly.

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

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