IAD - IDA

$109 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 8/17. 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
$327
Multiple Airlines
Sun 8/23Fri 8/28
IAD - IDA • 1 stop
Cheapest one-way
$109
Multiple Airlines
Mon 8/17
IAD - IDA • 1 stop
Top airlines
Cheapest • from $349 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Washington, D.C. and Idaho Falls. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $657 (round-trip)
Shortest trip • 7h 54m (one-way)
Insights
Insights
Insights
Insights
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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

Sun, Aug 23 - Fri, Aug 28
Multiple Airlines Logo
8:59 am - 10:47 am
IAD
-
IDA
27h 48m
1 stop
Multiple Airlines Logo
5:08 pm - 8:04 am
IDA
-
IAD
12h 56m
1 stop
$327Multiple Airlines
Thu, Aug 27 - Mon, Aug 31
United Airlines Logo
6:30 am - 1:29 pm
IAD
-
IDA
8h 59m
1 stop
United Airlines Logo
4:04 pm - 12:32 am
IDA
-
IAD
6h 28m
1 stop
$349United Airlines
Fri, Aug 21 - Thu, Aug 27
American Airlines Logo
6:09 am - 11:30 am
IAD
-
IDA
7h 21m
1 stop
American Airlines Logo
7:00 am - 5:48 pm
IDA
-
IAD
8h 48m
1 stop
$350American Airlines
Fri, Oct 30 - Sat, Nov 7
American Airlines Logo
6:24 am - 1:44 pm
IAD
-
IDA
9h 20m
1 stop
American Airlines Logo
1:58 pm - 10:32 pm
IDA
-
IAD
6h 34m
1 stop
$374American Airlines
Wed, Oct 28 - Sat, Oct 31
Alaska Airlines Logo
7:00 am - 3:35 pm
IAD
-
IDA
10h 35m
1 stop
Alaska Airlines Logo
1:46 pm - 11:59 pm
IDA
-
IAD
8h 13m
1 stop
$384Alaska Airlines
Sun, Aug 23 - Fri, Aug 28
Multiple Airlines Logo
7:24 pm - 10:47 am
IAD
-
IDA
17h 23m
2 stops
Multiple Airlines Logo
5:08 pm - 8:04 am
IDA
-
IAD
12h 56m
1 stop
$386Multiple Airlines
Tue, Oct 13 - Tue, Oct 20
United Airlines Logo
2:43 pm - 8:54 pm
IAD
-
IDA
8h 11m
1 stop
United Airlines Logo
2:28 pm - 11:25 pm
IDA
-
IAD
6h 57m
1 stop
$439United Airlines
Tue, Oct 13 - Tue, Oct 20
Delta Logo
7:15 am - 12:27 pm
IAD
-
IDA
7h 12m
1 stop
Delta Logo
6:45 pm - 9:11 am
IDA
-
IAD
12h 26m
2 stops
$464Delta
Sun, Aug 16 - Mon, Aug 24
Multiple Airlines Logo
9:50 am - 10:04 pm
IAD
-
IDA
38h 14m
2 stops
Multiple Airlines Logo
5:33 pm - 8:04 am
IDA
-
IAD
12h 31m
1 stop
$466Multiple Airlines
Fri, Oct 30 - Sat, Nov 7
Alaska Airlines Logo
7:24 pm - 1:06 pm
IAD
-
IDA
19h 42m
2 stops
Alaska Airlines Logo
6:04 am - 4:14 pm
IDA
-
IAD
8h 10m
1 stop
$486Alaska 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.

Which airlines provide the cheapest flights from Washington, D.C. to Idaho Falls?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 5 days.

In the past 5 days, the cheapest round-trip tickets from Washington, D.C. to Idaho Falls were found on United Airlines ($349) and American Airlines ($350).

Good to know

Cheapest flight$109
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 5 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Idaho Falls was $109 for a one-way ticket and $327 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?

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

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

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Idaho Falls are Alaska Airlines and United Airlines. With an average price for the route of $708 and an overall rating of 7.9, Alaska Airlines is the most popular choice. United Airlines is also a great choice for the route, with an average price of $581 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
Alaska AirlinesOverall score based on 12583 reviews
7.0Food
7.8Comfort
8.1Boarding
8.5Crew
7.0Entertainment
Airline reviews

The agents were super helpful. I was traveling with my mother inlaw who needed whell chair assisstance. The help and accomodation from the checkin crew, to the boarding crew and inflight crew was excellent.

10.0 ExcellentAnonymous, Jun 2026
IAD - SEA
Read more Alaska Airlines reviews

The agents were super helpful. I was traveling with my mother inlaw who needed whell chair assisstance. The help and accomodation from the checkin crew, to the boarding crew and inflight crew was excellent.

The crew was great and everything went smoothly coming and going.

The food was terrible, worse that what you get with UA, an already one of the lowest standards to beat. How cheap one could be, providing that kind of junk food in first class. Unbelievable! The seats were not very comfortable either. And there were no screens either, not that I cared much but for you to know.

The aircraft was extremely warm the entire flight. After we landed we were stuck on the plane for another 45 minutes without a gate to deboard from. The smell of exhaust from the engines in the cabin along with the heat inside the cabin made the flight uncomfortable.

We appreciated that the flight attendant came through 3 times with drinks or water on the long flight..I was also glad that they were separating out recycling! I would have liked a 12oz sofa can instead of 7oz, but that's a minor quibble. The knee space in economy was also better than most of Alaska's competitors.

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.

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!

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!!

Nobody’s fault but turbulence all the way meant no service and no access to the bathroom,

Like: departed and arrived on time. Unlike: Food options for purchase allways bad, 1 of 2 of the crew members not very friendly at all. Seats and leg room aweful. At this point I am thinking on switching to AA.

United didn’t even try to hold the flight for me. They knew I had a tight connection and when I arrived at the gate less than 10 mins after final boarding the flight had already gone. The gate agent wasn’t even notified that I was on my way. She was told I wasn’t at the airport

Good quick flight on a small but comfortable plane. I'm 6'3 and had plenty of space.

The flight was delayed so we were dead tired, and after that the turbulence was horrible. I was very scared.

Very good. Because of the delays with my previous flight, I missed my connection, but I was able to book another flight through the United app easily.

Was happy we finally got upgraded in 1st class. The seat getting old. The cushiness need some improvement.

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.

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

Information on your arrival and departure airports