IAD - IDA

$210 Find Cheap Flights from Washington, D.C. to Idaho Falls

This is the cheapest round-trip 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 4/14. 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
$285
Alaska Airlines
Tue 4/14Tue 4/21
IAD - IDA • 1 stop
Cheapest one-way
$305
Alaska Airlines
Fri 3/13
IAD - IDA • 1 stop
Top airlines
Alaska Airlines
Cheapest • from $285 (round-trip)
United Airlines
Best reviews • 7.4 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
Dallas (DFW)
Cheapest • Avg $537 (round-trip)
Salt Lake City (SLC)
Shortest trip • 7h 41m (one-way)
Insights
Insights
Insights
Insights
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

Tue, Apr 14 - Tue, Apr 21
Alaska Airlines Logo
7:00 am - 4:19 pm
IAD
-
IDA
11h 19m
1 stop
Alaska Airlines Logo
4:59 pm - 12:09 am
IDA
-
IAD
29h 10m
1 stop
$285Alaska Airlines
Tue, Jul 21 - Tue, Jul 28
United Airlines Logo
6:30 am - 1:25 pm
IAD
-
IDA
8h 55m
1 stop
United Airlines Logo
2:30 pm - 12:45 am
IDA
-
IAD
8h 15m
1 stop
$334United Airlines
Tue, Apr 14 - Sat, Apr 18
Alaska Airlines Logo
7:00 am - 4:19 pm
IAD
-
IDA
11h 19m
1 stop
Alaska Airlines Logo
4:59 pm - 5:40 am
IDA
-
IAD
10h 41m
1 stop
$335Alaska Airlines
Tue, Apr 14 - Mon, Apr 20
United Airlines Logo
9:55 am - 3:39 pm
IAD
-
IDA
7h 44m
1 stop
United Airlines Logo
2:30 pm - 11:34 pm
IDA
-
IAD
7h 04m
1 stop
$349United Airlines
Tue, Apr 14 - Thu, Apr 23
Alaska Airlines Logo
7:00 am - 4:19 pm
IAD
-
IDA
11h 19m
1 stop
Alaska Airlines Logo
6:00 am - 12:09 am
IDA
-
IAD
16h 09m
1 stop
$360Alaska Airlines
Tue, Apr 14 - Wed, Apr 22
Alaska Airlines Logo
7:00 am - 4:19 pm
IAD
-
IDA
11h 19m
1 stop
Alaska Airlines Logo
4:06 pm - 12:09 am
IDA
-
IAD
30h 03m
1 stop
$375Alaska Airlines
Wed, May 13 - Tue, May 19
Alaska Airlines Logo
6:00 am - 3:26 pm
IAD
-
IDA
11h 26m
1 stop
Alaska Airlines Logo
6:00 am - 4:35 pm
IDA
-
IAD
8h 35m
1 stop
$379Alaska Airlines
Thu, Apr 16 - Sat, Apr 18
American Airlines Logo
7:00 am - 1:13 pm
IAD
-
IDA
8h 13m
1 stop
American Airlines Logo
1:43 pm - 11:26 pm
IDA
-
IAD
7h 43m
1 stop
$393American Airlines
Mon, Apr 13 - Tue, Apr 21
Alaska Airlines Logo
7:11 pm - 4:19 pm
IAD
-
IDA
23h 08m
1 stop
Alaska Airlines Logo
4:59 pm - 12:09 am
IDA
-
IAD
29h 10m
1 stop
$394Alaska Airlines
Thu, Apr 16 - Sat, Apr 18
American Airlines Logo
7:00 am - 1:13 pm
IAD
-
IDA
8h 13m
1 stop
American Airlines Logo
7:48 am - 11:26 pm
IDA
-
IAD
13h 38m
2 stops
$398American 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 72 hours.

In the past 3 days, the cheapest round-trip tickets from Washington, D.C. to Idaho Falls were found on Alaska Airlines ($285) and United Airlines ($334).

Good to know

Cheapest flight$285
Most popular time to fly with an average 32% increase in price.
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 $210 for a one-way ticket and $285 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?

    Star Alliance is the only airline alliance operating flights between Washington, D.C. and Idaho Falls.

  • 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 airline 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.
7.4
United AirlinesOverall score based on 9403 reviews
7.7Boarding
8.1Crew
6.6Food
7.3Comfort
7.1Entertainment
Airline reviews

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

4.0 OkayOlga, Mar 2026
IAD - TYS
Read more United Airlines reviews

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

Wifi took a while to kick in and we had a maintenance issue that took over 40 mins at the gate in Washington before pulling back

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.

Ineffective communication with United resulted in lost baggage. Their Baggage Tracing counter at MUC was shut down from 11:00-14:15 on my arrival. Undertrained, underinformed staff had me Running all over MUC to find someone to help me to no avail. Staff was rude, unhelpful, and unable to effectively use the systems they did have operational. They refused to contact United in any way or provide any accommodation or other resources while I waited for my luggage. This has destroyed my downstream itinerary. If they had even the slightest visibility I may have been able to reschedule/plan, but again, their staff provided nothing, and did nothing more than their website, which doesn’t even work on a standard phone browser. Miserable failure at all levels that weren’t associated with the operation of the aircraft.

Sat next to a one year old. She crawled all over the place and made me laugh.

The Crew and the food was the worst I ever had in Business Class. First they told us there were no space for carry on. It was plenty of space over our 2 row seats, we had to ask to let us travel with it which was accepted. They were aware that we had to run for the connection due to the previous flight delay. Have us one hour waiting for more customers and not even offer a glass of water. Then started the service and they started to serve other passengers drinks in business and did not offer any drinks until they serve our pre ordered meal and I ask for something to drink. I had to wait until they finished to serve all passengers until Inget something. The crew was the worts I ever had for Business Class in my life.

Not great experience - we were super late boarding due to issues with aircraft. Then when we finally all got onboard and seated and they started taxiing out to the runway they just stopped then turned around and went back to the airport. Apparently the crew “ran out of time” to legally fly us. They mentioned that they were about 2 minutes away from taking off. I understand the rules and safety but kinda wonder why they would have bothered boarding us in the first place? Had to go all the way back and de plane and then wait in a HUGE line to get a hotel (this is somewhere around 2:30am) finally got to hotel by Uber (no shuttle after 20min so gave up) and they ended up putting us all back on the same aircraft at 10am next morning so got about 2.5 hours sleep. They did give us. $250 credit, but it was a São Paulo Brazil flight out of Dulles. The flight and everything was fine.

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.

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

Information on your arrival and departure airports