$77 Find Cheap Flights from Washington, D.C. 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 Washington, D.C. to Idaho departing on 1/11. 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 Washington, D.C. to Idaho

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Boise
Boise1 stop$145
Hailey
Hailey1 stop$312
Lewiston
Lewiston1 stop$492
Twin Falls
Twin Falls1 stop$447
Pocatello
Pocatello2 stops$467
Spokane
Spokane2 stops$256
Boise
Boise1 stop$145
Hailey
Hailey1 stop$312
Lewiston
Lewiston1 stop$492
Twin Falls
Twin Falls1 stop$447
Pocatello
Pocatello2 stops$467
Spokane
Spokane2 stops$256

Book Cheap Washington, D.C. 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 Washington, D.C. 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 Washington, D.C. to Idaho

Thu, Dec 11 - Sun, Dec 14
Frontier Logo
2:00 pm - 11:49 amDCA-BOI
23h 49m1 stop
Frontier Logo
12:44 pm - 9:59 pmBOI-DCA
7h 15m1 stop
$145Frontier
Find Deal
Thu, Nov 20 - Sun, Nov 23
Frontier Logo
8:00 am - 11:53 amDCA-BOI
29h 53m1 stop
Frontier Logo
12:48 pm - 9:59 pmBOI-DCA
7h 11m1 stop
$200Frontier
Find Deal
Thu, Dec 4 - Tue, Dec 9
Delta Logo
1:52 pm - 10:49 pmBWI-GEG
11h 57m2 stops
Delta Logo
7:35 pm - 11:11 amGEG-BWI
12h 36m2 stops
$256Delta
Find Deal
Wed, Dec 10 - Mon, Dec 15
Alaska Airlines Logo
8:00 am - 12:24 amDCA-GEG
19h 24m1 stop
Alaska Airlines Logo
7:47 pm - 4:08 pmGEG-DCA
17h 21m1 stop
$266Alaska Airlines
Find Deal
Wed, Dec 10 - Mon, Dec 15
Alaska Airlines Logo
7:34 am - 9:28 pmIAD-GEG
16h 54m1 stop
Alaska Airlines Logo
7:47 pm - 4:36 pmGEG-IAD
17h 49m1 stop
$266Alaska Airlines
Find Deal
Thu, Dec 11 - Sun, Dec 14
Delta Logo
4:55 pm - 10:49 pmDCA-GEG
8h 54m1 stop
Delta Logo
5:05 am - 3:27 pmGEG-DCA
7h 22m1 stop
$267Delta
Find Deal
Sat, Dec 6 - Sat, Dec 13
United Airlines Logo
10:20 am - 7:14 pmBWI-BOI
10h 54m2 stops
United Airlines Logo
6:20 am - 3:11 pmBOI-BWI
6h 51m1 stop
$312United Airlines
Find Deal
Sat, Jan 10 - Wed, Jan 14
United Airlines Logo
9:00 am - 11:30 amIAD-JAC
4h 30mnonstop
United Airlines Logo
2:40 pm - 11:22 pmJAC-IAD
6h 42m1 stop
$319United Airlines
Find Deal
Sun, Jan 18 - Sat, Jan 24
American Airlines Logo
7:04 am - 3:23 pmIAD-SUN
10h 19m2 stops
American Airlines Logo
8:09 am - 9:17 pmSUN-IAD
11h 08m2 stops
$322American Airlines
Find Deal
Thu, Nov 27 - Wed, Dec 3
American Airlines Logo
6:04 am - 12:30 pmIAD-GEG
9h 26m1 stop
American Airlines Logo
6:35 am - 11:08 pmGEG-IAD
13h 33m2 stops
$322American Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for Washington, D.C. to Idaho flights

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

How much is a round-trip flight from Washington, D.C. to Idaho?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Washington, D.C. to Idaho departing in December.

What is the cheapest month to fly from Washington, D.C. 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. 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. to Idaho is April, when tickets cost $296 (return) on average. On the other hand, the most expensive months are December and November, when the average cost of round-trip tickets is $737 and $455 respectively.

What’s the cheapest day of the week to fly from Washington, D.C. to Idaho?

The average price of all round-trip flights from Washington, D.C. 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, D.C. to Idaho. For your return ticket, we recommend flying on a Saturday and avoiding Mondays for the best deals.

Good to know

Low seasonOctober
Cheapest flight$105
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly with an average 40% 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, D.C. 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, D.C. to Idaho.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington, D.C. to Idaho?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Washington, D.C. 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, D.C. 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, D.C. 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, D.C. 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, D.C. 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 5 airlines serving from Washington, D.C. 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 Washington, D.C. 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 11247 reviews
7.1Food
7.8Comfort
8.1Boarding
8.5Crew
7.0Entertainment
Airline reviews

Pretzels are always a disappointment. Cheezits, Sun Chips, trail mix, anything else would be nice.

8.0 ExcellentLyle, Nov 2025SEA - BOI
Read more Alaska Airlines reviews

Pretzels are always a disappointment. Cheezits, Sun Chips, trail mix, anything else would be nice.

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.

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.

Plane crashed into a bus or some other vehicle on the ground while pulling out of the gate. No injuries, but wing tip was damaged and returned to gate for “maintenance issues” and we departed 5 hours later because the plane went out of service and new plane was flown in from a nearby airport, Midway.

Ever since Southwest starting charging for bags, passengers don't want to pay to check their bags, so the gate agents have to beg people to check their roller bags now because there's "not enough space". This was a terrible business move by Southwest.

Full cans of soda would be nice. A choice between two snacks would be appreciated.

Tried watching free movie and it kept freezing so I couldn’t finish.

All was good. I just had a hard time getting connected to the WiFi/internet during the flight

Sacrament staff are always polite and helpful. Airport is easy to maneuver and boarding is straightforward.

Great flight. Outstanding Service. Southwest was able to put us on a direct flight to Denver when the connection could have been affected by a later arrival to Baltimore. The direct flight was less expensive that the flight with the connection in Baltimore.

Delays delays delays. Late taking off, late landing, wait for a gate, etc.

Boarded on time but once we were ready for take off, the crew determined that, although every seat was taken, somehow someone was on the wrong flight. Delay, delay delay, announcements and ended up with one person checking EVERY ID against their passenger Manifest only to figure out it was a "clerical error." We departed 54 minutes late causing me to run in the St. Louis Airport to make my connection and lose the priority boarding spot I had paid for. Unnecessary delay.

I was re-booked onto another flight because my original flight was delayed and I would have missed my connector. I ended up in the “C” group after paying extra to be in the “A “ group on the original flight. At least if you’re going to re-book people, re-book them into the same group.

I truly love flying with Delta. They have always treated me with the upmost respect

Our flight attendant in FIRST CLASS was one of the worst I’ve ever had. She was not at all pleasant, nor particularly good at her service.

Everything went well and was good. Nothing exceptional, but no complaints either. Cheap seats are pretty comfortable.

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They ended up paying for the bag twice, but the counter wouldn't take my baggage receipt. Left it to me to resolve. Not sure how to resolve the issue.

The customer service before board was very rude and when I expressed my concerns about making the connecting flight she laughed and told me I bought the wrong ticket. I explained once it showed the flight was delayed it no longer let me change seats or anything. I was trying to upgrade to make sure I would get to the next gate on time.

Non stop on long haul is the way to go. Great experience

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

They changed planes and the new plane couldn’t carry enough fuel to fly across the country so we had to stop in Kansas City to refuel. Flight was delayed .

Flight was too crowded and seats are too small, especially since passengrs are getting larger. Having a middle seat is ALWAYS tough! Woman on my left was large & kept creeping in to my space. Flight personnel were great! Have more savory rather than sweet snacks please.

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!

During booking, I kept trying submitting my payment from the Mexican website and it didn't work. After I had the idea to change it to the Canadian website, it worked but I had to be charged the equivalent of 50 CAD more. I received the clear instruction that I would only be able to check-in at the airport and that it was impossible to select a seat 24 hours before departure, that I had to pay 144 CAD to do so, although not only was I able to check-in 24 hours before departure, but I could have selected my seats for free then. All in all, I almost threw $200 out the window due to misleading information. Besides, the app kept crashing, the information to get to the gate on the app was inaccurate, my gate was switched and I was only informed once in the air (luckily I had noticed the departure pannel), I was not addressed in my language beforehand and even if I tried I was immediately answered in English (which meant the crew understood but didn't want to answer accordingly), there was only one snack & beverage service on my medium haul flight and no beverage service on my short haul flight. To be fair, the planes were comfortable, the crew apart from the language issue was helpful, dynamic and engaging, the plane was clean and the directions were clear and direct. United has a lot of potential to be one of my favourite airlines, but the devil is in the details and a lot of them missed the target.

Better WiFi. I cannot understand that in 2025, United is so behind on a technology that is now a necessity and still painfully unreliable, slow and keeps disconnecting.

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 loved the steward on the plane. He made the night enjoyable

I enjoyed the extra leg room compared to other airlines. The first stewards made my daughter’s birthday special by giving her an extra snack. Then the last one coming home from Chicago to Appleton made our night really enjoyable Thanks for making our trip enjoyable

The flight was smooth, the pilot kept us informed about delays and we arrived more of less on time

Flight delay was communicated before leaving for airport which caused it to be a non-event. Great flight and crew!

Did not get any refreshments. Crew was very nice but limited. Small seats

Wish some foods provided rather than just biscuit/cookie for flight more than 2 hours

Wish a flight with more than 2 hours with some snack rather than just cookie/biscuit.

The flight attendant, a black woman with curly hair who sat near Row 21, was wonderful and kind.

It was good..clean, comfy seat. Friendly warm welcoming crew. Was able to check my cabin luggage at the gate which I was able to pickup in a decent time from baggage claim. The app gave all updates from delays to baggage claim info. Overall smooth flight.

It took way too long to diagnose and solve the problem of a broken crew member cabin seat. Though compensation for the volunteer who left the flight was very kind.

Everything you need to know for your flight from Washington, D.C. to Idaho

Cabin class types available on flights to Idaho

Cabin classes available on flights to Idaho. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.