IAD - IDA

$195 Find Cheap Flights from Washington, D.C. to Idaho Falls - Compare and Save

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 9/5. 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

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Everything you should know

Cheapest round-trip
$359
Typical prices: $463-$539
Alaska Airlines
Tue 9/15Tue 9/22
IAD - IDA • 1 stop
Cheapest one-way
$195
Delta
Sat 9/5
IAD - IDA • 2 stops
Top airlines
Cheapest • from $359 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
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Airline reviews
Airline reviews
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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
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Top layover airports
Cheapest • Avg $566 (round-trip)
Shortest trip • 7h 41m (one-way)
Insights
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Insights
When to travel
Cheapest • 100% price drop
Most popular
Good to know
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Good to know
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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

Tue, Sep 15 - Tue, Sep 22
Alaska Airlines Logo
7:00 am - 3:20 pmIAD  Washington, D.C. Dulles Intl-IDA Idaho Falls Fanning Field
10h 20m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
2:01 pm - 11:59 pmIDA  Idaho Falls Fanning Field-IAD Washington, D.C. Dulles Intl
7h 58m1 stop Seattle/Tacoma Intl
$359Alaska Airlines
Sat, Sep 5 - Wed, Sep 9
United Airlines Logo
4:15 pm - 9:18 pmIAD  Washington, D.C. Dulles Intl-IDA Idaho Falls Fanning Field
7h 03m1 stop Denver Intl
United Airlines Logo
7:00 am - 5:50 pmIDA  Idaho Falls Fanning Field-IAD Washington, D.C. Dulles Intl
8h 50m1 stop Denver Intl
$359United Airlines
Fri, Nov 6 - Sun, Nov 8
Delta Logo
6:13 am - 12:22 pmIAD  Washington, D.C. Dulles Intl-IDA Idaho Falls Fanning Field
8h 09m1 stop Salt Lake City
Delta Logo
1:05 pm - 11:35 pmIDA  Idaho Falls Fanning Field-IAD Washington, D.C. Dulles Intl
8h 30m1 stop Salt Lake City
$359Delta
Wed, Aug 26 - Tue, Sep 1
Delta Logo
7:00 am - 2:35 pmIAD  Washington, D.C. Dulles Intl-IDA Idaho Falls Fanning Field
9h 35m1 stop Salt Lake City
Delta Logo
3:17 pm - 11:39 pmIDA  Idaho Falls Fanning Field-IAD Washington, D.C. Dulles Intl
6h 22m1 stop Salt Lake City
$359Delta
Thu, Aug 27 - Tue, Sep 1
United Airlines Logo
6:30 am - 1:29 pmIAD  Washington, D.C. Dulles Intl-IDA Idaho Falls Fanning Field
8h 59m1 stop Denver Intl
United Airlines Logo
2:25 pm - 11:19 pmIDA  Idaho Falls Fanning Field-IAD Washington, D.C. Dulles Intl
6h 54m1 stop Denver Intl
$359United Airlines
Thu, Aug 27 - Mon, Aug 31
United Airlines Logo
6:30 am - 1:29 pmIAD  Washington, D.C. Dulles Intl-IDA Idaho Falls Fanning Field
8h 59m1 stop Denver Intl
United Airlines Logo
4:04 pm - 12:32 amIDA  Idaho Falls Fanning Field-IAD Washington, D.C. Dulles Intl
6h 28m1 stop Denver Intl
$359United Airlines
Wed, Aug 26 - Tue, Sep 1
Delta Logo
12:29 pm - 10:32 pmIAD  Washington, D.C. Dulles Intl-IDA Idaho Falls Fanning Field
12h 03m2 stops New York John F Kennedy Intl Salt Lake City
Delta Logo
3:17 pm - 11:39 pmIDA  Idaho Falls Fanning Field-IAD Washington, D.C. Dulles Intl
6h 22m1 stop Salt Lake City
$364Delta
Sat, Sep 19 - Tue, Sep 22
Alaska Airlines Logo
7:00 am - 3:20 pmIAD  Washington, D.C. Dulles Intl-IDA Idaho Falls Fanning Field
10h 20m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
6:18 am - 4:54 pmIDA  Idaho Falls Fanning Field-IAD Washington, D.C. Dulles Intl
8h 36m1 stop Seattle/Tacoma Intl
$389Alaska Airlines
Tue, Sep 15 - Wed, Sep 23
Alaska Airlines Logo
7:00 am - 3:20 pmIAD  Washington, D.C. Dulles Intl-IDA Idaho Falls Fanning Field
10h 20m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
2:01 pm - 11:59 pmIDA  Idaho Falls Fanning Field-IAD Washington, D.C. Dulles Intl
7h 58m1 stop Seattle/Tacoma Intl
$389Alaska Airlines
Wed, Sep 16 - Tue, Sep 22
Alaska Airlines Logo
9:03 am - 3:20 pmIAD  Washington, D.C. Dulles Intl-IDA Idaho Falls Fanning Field
8h 17m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
2:01 pm - 11:59 pmIDA  Idaho Falls Fanning Field-IAD Washington, D.C. Dulles Intl
7h 58m1 stop Seattle/Tacoma Intl
$389Alaska 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.

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 August.

Flight prices are below average for this route right now.

Flights to Idaho Falls from Washington, D.C. Dulles Intl Airport usually cost between $458 and $509 in August.
The lowest price found in the past 5 days was $359 on United Airlines (Aug 27-Aug 31).

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 February, where tickets cost $0 (return) on average. On the other hand, the most expensive months are May and June, where the average cost of round-trip tickets is $795 and $784 respectively.

Good to know

Low season

November

Cheapest flight

$195
Best time to beat the crowds with an average 36% drop in price.
Most popular time to fly and prices are also 15% 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 5 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Idaho Falls was $195 for a one-way ticket and $359 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?

    The Airbus A321neo is the aircraft model that flies most regularly on the Washington, D.C. to Idaho Falls flight 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 $491 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 12772 reviews
8.1Boarding
7.0Entertainment
7.8Comfort
8.5Crew
7.0Food
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
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,

My flight was delayed so bad i missed u it so i just said never mind

Delayed 2 hours while stuck on the aircraft. If the luggage was properly loaded the first time we probably wouldn’t have been delayed at all

Onboard staff was courteous, helpful, responsive and friendly. The boarding process was disorganized, poorly communicated, and disheveled. Gate agents were yelling instead of using the PA system, didn’t communicate the timing delay of our flight, and created an atmosphere of chaos rather than order and communication. As far as I know, there was no reason for their. I would hate to see how it operated under extreme conditions. I’ve never seen United Airlines operations in such a state.

The flight did not have its customary snacks during the flight. Apparently they were never loaded on the plane.

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.

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

Information on your arrival and departure airports