IAD - IDA

$200 Find Cheap Flights from Washington, D.C. to Idaho Falls

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 Falls departing on 1/6. 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 Falls

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Idaho Falls, 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 Falls, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$383
Overall average: $414
Alaska Airlines
Fri 1/16Wed 1/21
IAD - IDA • 1 stop
Cheapest one-way
$200
Alaska Airlines
Tue 1/6
IAD - IDA • 1 stop
Top airlines
Alaska Airlines
Cheapest • from $383 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
January
Cheapest • 34% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Idaho Falls!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Washington, D.C. to Idaho Falls (IAD-IDA)

 
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 Falls 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 Falls

Fri, Jan 16 - Wed, Jan 21
Alaska Airlines Logo
6:04 pm - 10:59 pmIAD-IDA
30h 55m1 stop
Alaska Airlines Logo
9:00 am - 4:26 pmIDA-IAD
29h 26m1 stop
$383Alaska Airlines
Find Deal
Sat, Jan 17 - Wed, Jan 21
Alaska Airlines Logo
6:04 pm - 6:18 pmIAD-IDA
26h 14m1 stop
Alaska Airlines Logo
9:00 am - 4:26 pmIDA-IAD
29h 26m1 stop
$392Alaska Airlines
Find Deal
Wed, Feb 18 - Fri, Feb 27
Alaska Airlines Logo
7:00 am - 3:23 pmIAD-IDA
10h 23m1 stop
Alaska Airlines Logo
4:00 pm - 5:55 amIDA-IAD
11h 55m1 stop
$402Alaska Airlines
Find Deal
Tue, Mar 10 - Wed, Mar 11
Alaska Airlines Logo
7:00 am - 3:23 pmIAD-IDA
10h 23m1 stop
Alaska Airlines Logo
4:00 pm - 5:55 amIDA-IAD
11h 55m1 stop
$416Alaska Airlines
Find Deal
Fri, Jan 16 - Wed, Jan 21
American Airlines Logo
6:00 am - 1:37 pmIAD-IDA
9h 37m1 stop
American Airlines Logo
7:20 am - 9:17 pmIDA-IAD
11h 57m2 stops
$420American Airlines
Find Deal
Sat, Jan 17 - Wed, Jan 21
American Airlines Logo
11:34 am - 10:36 pmIAD-IDA
13h 02m2 stops
American Airlines Logo
7:20 am - 9:17 pmIDA-IAD
11h 57m2 stops
$425American Airlines
Find Deal
Wed, Jan 7 - Wed, Jan 7
United Airlines Logo
8:15 am - 1:30 pmIAD-IDA
7h 15m1 stop
United Airlines Logo
2:40 pm - 11:22 pmIDA-IAD
6h 42m1 stop
$506United Airlines
Find Deal
Wed, Dec 24 - Sun, Jan 11
United Airlines Logo
5:20 pm - 10:59 pmIAD-IDA
7h 39m1 stop
United Airlines Logo
2:40 pm - 11:22 pmIDA-IAD
6h 42m1 stop
$508United Airlines
Find Deal
Wed, Nov 19 - Sun, Nov 23
Delta Logo
7:10 am - 12:34 pmIAD-IDA
7h 24m1 stop
Delta Logo
1:15 pm - 11:58 pmIDA-IAD
8h 43m1 stop
$526Delta
Find Deal
Wed, Nov 19 - Sun, Nov 23
Delta Logo
12:37 pm - 10:19 pmIAD-IDA
11h 42m2 stops
Delta Logo
1:15 pm - 11:58 pmIDA-IAD
8h 43m1 stop
$531Delta
Find Deal
Booking Insights

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

Get data-powered insights and trends into flights from Washington, D.C. to Idaho Falls 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, D.C. to Idaho Falls?

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

When flying from Washington, D.C. to Idaho Falls, you should consider leaving on a Saturday and avoid Mondays if you are looking for the best rates. For your return to Washington, D.C., you’ll find the best rates on Wednesdays and the most expensive ones on Saturdays.

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

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 Falls, 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 Falls is January, where tickets cost $414 (return) on average. On the other hand, the most expensive months are March and May, where the average cost of round-trip tickets is $914 and $780 respectively.

Good to know

Low seasonMay
Cheapest flight$200
Best time to beat the crowds but there is an average 25% increase in price.
Most popular time to fly and prices are also 10% lower on average.
Flight from Washington, D.C. to Idaho Falls

When to book flights from Washington, D.C. to Idaho Falls

Are your dates flexible? Find out the best times to travel from Washington, D.C. to Idaho Falls based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Washington, D.C. to Idaho Falls flights

  • What is the cheapest flight from Washington, D.C. Dulles Intl Airport to Idaho Falls?

    In the last 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Idaho Falls was $200 for a one-way ticket and $383 for a round-trip.

  • Do I need a passport to fly between Washington, D.C. and Idaho Falls?

    A passport is not required to fly from Washington, D.C. to Idaho Falls.

  • Which airports will I be using when flying from Washington, D.C. to Idaho Falls?

    When flying out of Washington, D.C. you will be using Washington, D.C. Dulles Intl. You will be landing at Idaho Falls, also known as Idaho Falls Fanning Field.

  • Which aircraft models fly most regularly from Washington, D.C. to Idaho Falls?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Washington, D.C. to Idaho Falls?

    SkyTeam, and Star Alliance are the airline alliances operating flights between Washington, D.C. and Idaho Falls, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from Washington, D.C. to Idaho Falls, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Idaho Falls are Delta and United Airlines. With an average price for the route of $467 and an overall rating of 7.9, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $700 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Washington, D.C. to Idaho Falls?

    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 Falls.

  • 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 Falls?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Idaho Falls from Washington, D.C. 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 Falls?

    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 to Idaho Falls with an airline and back to Washington, D.C. with another airline. Booking your flights between Washington, D.C. and IDA can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington, D.C. to Idaho Falls?

    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 to Idaho Falls from Washington, D.C. up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Washington, D.C. to Idaho Falls

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Idaho Falls. 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 Falls? 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.
7.9
DeltaOverall score based on 8004 reviews
7.9Entertainment
7.9Comfort
8.5Crew
8.2Boarding
7.3Food
Airline reviews

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

10.0 ExcellentMAYRA, Nov 2025JFK - MIA
Read more Delta reviews

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.

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

Information on your arrival and departure airports

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