IAD - IDA

$153 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 11/18. 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 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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 23% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$394
Typical prices: $647-$699
Alaska Airlines
Wed 11/5Wed 11/12
IAD - IDA • 1 stop
Cheapest one-way
$153
Multiple Airlines
Tue 11/18
IAD - IDA • 3 stops
Top airlines
Alaska Airlines
Cheapest • from $394 (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

Wed, Nov 5 - Wed, Nov 12
Alaska Airlines Logo
7:43 am - 3:13 pmIAD-IDA
9h 30m1 stop
Alaska Airlines Logo
3:50 pm - 6:23 amIDA-IAD
12h 33m1 stop
$394Alaska Airlines
Find Deal
Wed, Feb 18 - Fri, Feb 27
American Airlines Logo
6:32 am - 12:25 pmIAD-IDA
7h 53m1 stop
American Airlines Logo
1:34 pm - 10:12 pmIDA-IAD
6h 38m1 stop
$415American Airlines
Find Deal
Wed, Nov 12 - Wed, Nov 19
Delta Logo
12:37 pm - 10:19 pmIAD-IDA
11h 42m2 stops
Delta Logo
1:15 pm - 11:58 pmIDA-IAD
8h 43m1 stop
$420Delta
Find Deal
Wed, Nov 5 - Wed, Nov 12
Delta Logo
7:35 am - 6:13 pmIAD-IDA
12h 38m2 stops
Delta Logo
1:15 pm - 11:58 pmIDA-IAD
8h 43m1 stop
$425Delta
Find Deal
Fri, Jan 9 - Mon, Jan 12
Alaska Airlines Logo
6:04 pm - 6:18 pmIAD-IDA
26h 14m1 stop
Alaska Airlines Logo
9:00 am - 5:04 pmIDA-IAD
30h 04m2 stops
$435Alaska Airlines
Find Deal
Fri, Jan 9 - Mon, Jan 12
Alaska Airlines Logo
5:26 pm - 11:58 pmIAD-IDA
32h 32m2 stops
Alaska Airlines Logo
9:00 am - 5:04 pmIDA-IAD
30h 04m2 stops
$445Alaska Airlines
Find Deal
Thu, Oct 30 - Sat, Nov 8
United Airlines Logo
8:25 am - 3:16 pmIAD-IDA
8h 51m1 stop
United Airlines Logo
8:30 am - 6:52 pmIDA-IAD
8h 22m1 stop
$448United Airlines
Find Deal
Tue, Mar 10 - Wed, Mar 11
Hawaiian Airlines Logo
7:00 am - 3:23 pmIAD-IDA
10h 23m1 stop
Hawaiian Airlines Logo
4:00 pm - 5:55 amIDA-IAD
11h 55m1 stop
$449Hawaiian Airlines
Find Deal
Tue, Mar 10 - Wed, Mar 11
Hawaiian Airlines Logo
7:00 am - 3:23 pmIAD-IDA
10h 23m1 stop
Hawaiian Airlines Logo
4:00 pm - 5:55 amIDA-IAD
11h 55m1 stop
$490Hawaiian Airlines
Find Deal
Fri, Jan 16 - Tue, Jan 20
United Airlines Logo
10:32 pm - 9:56 amIAD-IDA
13h 24m1 stop
United Airlines Logo
2:40 pm - 4:17 pmIDA-IAD
23h 37m2 stops
$556United Airlines
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.

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

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. Dulles Intl Airport to Idaho Falls departing in November.

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$153
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 $153 for a one-way ticket and $394 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 $705 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 7984 reviews
7.9Comfort
7.3Food
8.2Boarding
8.5Crew
7.9Entertainment
Airline reviews

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 .

2.0 MediocreLeslie, Oct 2025BOS - SFO
Read more Delta reviews

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.

Flight was crowded and the woman sitting on my left was large & kept crouching in to my space. You need bigger seats or smaller passengers to fit into the seats you DO have! Snack were OK. Would appreciate if airlines had more savory rather than sweet snacks, thank you!

Delayed flight (1hour) plus a long layover after an overnight flight with no backup plane available.

We were delayed, which I think had to do with air traffic control. Otherwise, everything was great.

The boarding process needs to be refined. Sometimes the gate crew calls out the zones and then flip to showing the.zones boarding on the gate monitor display. So, unless you are huddled around the gate lanes watching the monitor, you could miss your boarding zone. Suggest the zones be announced each time a new zone is allowed to board.

The boarding process needs to be refined. Sometimes the gate crew call out the boarding zone, and then flip to the monitor to show which zones are boarding. So unless everyone is gathered around to see the monitor there is usually confusion as wi which zones are boarding.

On time flight. Seat comfort could be better in the Comfort section.

My issue was with TSA agents for delta airlines. My luggage got flagged. The agent was going thru another persons first. He took 20 min to go thru hers. I asked them to bring mine closer so I could sit down . They said you can go sit it will be fine. I said I am supposed to keep my eyes on my bags at all times. The agent was meticulously unwrapping 2 gifts that the lady had and then tried to re warp it. He was trying to be kind i get it but 20 min for me to stand watching him do that was ridiculous. It was 6 am and there were a ton of travelers. Mine was flagged for some air packed tea that I bought in Turkey. My previous delta flight and 2 others before didn’t flag it. Consistency would be nice. Also on the flight the window shades were down for take off and landing - I thought that was very odd I thought they had to remain open for take off and landing.

The flight was an hour and a half late departing which was inconvenient

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 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.

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

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.