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
$314
Alaska Airlines
Sat 1/24Wed 1/28
IAD - IDA • 1 stop
Cheapest one-way
$200
Alaska Airlines
Tue 1/6
IAD - IDA • 1 stop
Top airlines
Alaska Airlines
Cheapest • from $314 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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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

Sat, Jan 24 - Wed, Jan 28
Alaska Airlines Logo
6:04 pm - 10:59 pm
IAD
-
IDA
30h 55m1 stop
Alaska Airlines Logo
9:00 am - 4:26 pm
IDA
-
IAD
29h 26m1 stop
$314Alaska Airlines
Thu, Jan 8 - Mon, Jan 12
Alaska Airlines Logo
6:04 pm - 6:18 pm
IAD
-
IDA
26h 14m1 stop
Alaska Airlines Logo
6:58 pm - 4:26 pm
IDA
-
IAD
19h 28m1 stop
$324Alaska Airlines
Thu, Jan 8 - Mon, Jan 12
Alaska Airlines Logo
6:04 pm - 10:59 pm
IAD
-
IDA
30h 55m1 stop
Alaska Airlines Logo
6:58 pm - 4:26 pm
IDA
-
IAD
19h 28m1 stop
$344Alaska Airlines
Sat, Mar 7 - Wed, Mar 18
Alaska Airlines Logo
7:05 am - 4:43 pm
IAD
-
IDA
11h 38m1 stop
Alaska Airlines Logo
8:00 am - 5:55 pm
IDA
-
IAD
7h 55m1 stop
$388Alaska Airlines
Thu, Jan 8 - Mon, Jan 12
Delta Logo
7:30 am - 5:51 pm
IAD
-
IDA
12h 21m2 stops
Delta Logo
6:35 pm - 8:37 pm
IDA
-
IAD
24h 02m2 stops
$405Delta
Wed, May 27 - Wed, Jun 3
Alaska Airlines Logo
7:15 pm - 3:40 pm
IAD
-
IDA
22h 25m1 stop
Alaska Airlines Logo
4:20 pm - 7:36 am
IDA
-
IAD
13h 16m1 stop
$414Alaska Airlines
Wed, Feb 18 - Fri, Feb 27
Delta Logo
7:05 am - 12:27 pm
IAD
-
IDA
7h 22m1 stop
Delta Logo
1:10 pm - 11:46 pm
IDA
-
IAD
8h 36m1 stop
$415Delta
Sat, Jan 17 - Sat, Jan 24
Alaska Airlines Logo
6:04 pm - 6:18 pm
IAD
-
IDA
26h 14m1 stop
Alaska Airlines Logo
6:58 pm - 4:26 pm
IDA
-
IAD
19h 28m1 stop
$417Alaska Airlines
Wed, Feb 18 - Fri, Feb 27
Delta Logo
7:00 am - 5:44 pm
IAD
-
IDA
12h 44m2 stops
Delta Logo
1:10 pm - 11:46 pm
IDA
-
IAD
8h 36m1 stop
$420Delta
Sun, Mar 8 - Tue, Mar 17
Alaska Airlines Logo
7:05 am - 11:36 pm
IAD
-
IDA
18h 31m1 stop
Alaska Airlines Logo
5:20 pm - 5:55 pm
IDA
-
IAD
22h 35m1 stop
$423Alaska Airlines
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.

Good to know

Cheapest flight$200
Most popular time to fly and prices are also 9% 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 $314 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 8011 reviews
7.3Food
7.9Entertainment
8.5Crew
8.1Boarding
7.9Comfort
Airline reviews

Left on time, a bit delayed due to headwinds most of the trip.

10.0 ExcellentCharles, Dec 2025
DTW - PHX
Read more Delta reviews

Left on time, a bit delayed due to headwinds most of the trip.

I fly Delta all the time, have Platinum Medallion status. But this route seems to have major problems with delays and seems to never leave on time! Have only taken it twice in the last two weeks, and each time it had delays of more than 1 hour... very disappointed!!!!

Good seats in Main cabin, excellent service and excellent landing

My flight was cancelled with no explanation after I had already cleared security. I was given 4 options to rebook, only one being non-stop like I had paid for. I grabbed it. It was 4 plus hours later and then took off even later. Biggest complaint is that I booked early and had an aisle seat. They gave me a "window" seat in front of the exit row, so the seat did not decline. I weigh all of 103 #s and it was tight for me! For what I paid, I feel I was kind of ripped off. I think they should have given me the empty comfort seat for the inconvenience. There was no apology nor any explanation as to why the flight was cancelled. My guess is it benefitted Delta in some way.

Very smooth, on-time, and pleasantly uneventful flight. The team at the gate and on board were professional and genuinely courteous. The pilot kept us well updated throughout, and both takeoff and landing were steady and enjoyable without any drama. Just a good, solid flight. Thank you! 💗

Staff was exceptional! Everyone was kind, professional and friendly making the trip very pleasant. Thank you!

No lunch on a x-country flight scheduled for 10:50 am departure, arrived 5+ hrs later. That requires a black box label before you pay for the tickets. Worst, when I checked in online, it's specifically said that lunch was served on his flight for economy Plus passengers.

We had a lot of really rough weather but that was not Delta's fault. Pilot was amazing.

First, Delta needs more flights to/from Miami. Second, a 1000pm leaving at 1230pm is unacceptable from their biggest airport world hub. Another aircraft could have been used such as the aircraft scheduled to be used in the morning for that exact same route. Yes, I did get me there but the lack of sleep the next day didn't help me enjoy my entire trip since I was busy with activities during the weekend. This can be and is expected from Spirit (going bankrupt) and Frontier (despite they're nickel and dimers). But from Delta's World Hub? That's totally unacceptable!

This flight was straightforward and without difficulty. Service was OK, but I continue to be underwhelmed by level of attention given to Sky Priority passengers.

Starlink wifi on the Embraer E175 is an excellent experience. I was able to connect and work from IAD all the way to approach into BTV.

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.

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

Information on your arrival and departure airports