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Idaho Falls

$185+ Cheap flights from Washington, D.C. (WAS) to Idaho Falls (IDA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/2. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — IDA
Apr 22 — Apr 291
Wed 4/22
Wed 4/29
1 adult, Economy
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Cheap flight deals from Washington, D.C. to Idaho Falls

Cheapest flights from Washington, D.C. to Idaho Falls
Explore the most affordable flight options available from Washington, D.C. to Idaho Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 23, 2026.

This Alaska Airlines deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/247:51 am
BWI
-
IDA
1 stop9h 38m
Alaska Airlines
Wed 10/286:15 am
IDA
-
BWI
1 stop8h 56m
Alaska Airlines
Deal found 3/19$349
This American Airlines deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/115:00 am
DCA
-
IDA
1 stop8h 32m
American Airlines
Tue 8/2512:12 pm
IDA
-
DCA
1 stop9h 46m
American Airlines
Deal found 3/20$349
This American Airlines deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/116:24 am
IAD
-
IDA
1 stop9h 20m
American Airlines
Tue 8/2512:12 pm
IDA
-
IAD
1 stop8h 35m
American Airlines
Deal found 3/22$349
This Delta deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/115:00 pm
DCA
-
IDA
1 stop7h 14m
Delta
Tue 8/256:50 pm
IDA
-
DCA
2 stops12h 23m
Delta
Deal found 3/21$354
This Alaska Airlines deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/289:00 am
IAD
-
IDA
1 stop8h 29m
Alaska Airlines
Sat 10/316:15 am
IDA
-
IAD
1 stop8h 11m
Alaska Airlines
Deal found 3/19$359
This Delta deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/147:15 am
BWI
-
IDA
1 stop7h 11m
Delta
Tue 4/286:58 pm
IDA
-
BWI
1 stop9h 02m
Delta
Deal found 3/18$369
This Delta deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/1311:00 am
DCA
-
IDA
2 stops13h 40m
Delta
Tue 4/286:58 pm
IDA
-
DCA
2 stops13h 21m
Delta
Deal found 3/18$369
This Alaska Airlines deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/47:20 pm
IAD
-
IDA
1 stop22h 09m
Alaska Airlines
Wed 5/66:00 am
IDA
-
IAD
1 stop10h 20m
Alaska Airlines
Deal found 3/22$369
This United Airlines deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/296:30 am
IAD
-
IDA
1 stop8h 55m
United Airlines
Mon 6/14:10 pm
IDA
-
IAD
1 stop6h 35m
United Airlines
Deal found 3/20$387
This American Airlines deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/113:48 pm
BWI
-
IDA
1 stop7h 34m
American Airlines
Tue 8/2512:12 pm
IDA
-
BWI
1 stop7h 15m
American Airlines
Deal found 3/22$396
This Delta deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/1311:00 am
DCA
-
IDA
2 stops13h 40m
Delta
Mon 4/276:58 pm
IDA
-
DCA
2 stops13h 21m
Delta
Deal found 3/18$404
This American Airlines deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/127:30 am
DCA
-
IDA
1 stop8h 14m
American Airlines
Sat 9/191:44 pm
IDA
-
DCA
1 stop8h 15m
American Airlines
Deal found 3/18$410

Find flight deals from Washington, D.C. to Idaho Falls

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) to Idaho Falls (IDA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$349
(American Airlines)

One-way from

$185
(American Airlines)
Provider with most accurate pricing for Washington, D.C. (WAS)-Idaho Falls Fanning Field flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Idaho Falls Fanning Field flights.
Search Deals
From Washington, D.C. (WAS) to Idaho Falls Fanning Field
Search Deals
One-way flight from Washington, D.C. (WAS) to Idaho Falls Fanning Field
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington, D.C. to Idaho Falls that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 23, 2026.
Use the filters below to find and compare flights from Washington, D.C. to Idaho Falls that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Tue 8/11

5:00 pm-10:14 pm

1 stop7h 14m

Idaho Falls Fanning Field

Tue 8/25

6:50 pm-9:13 am

2 stops12h 23m

$364
Quickest round-trip

BaltimoreIdaho Falls

BWI - IDA

BWIIDA

Baltimore/Washington

Tue 4/14

7:15 am-12:26 pm

1 stop7h 11m

Idaho Falls Fanning Field

Tue 4/28

6:58 pm-6:00 am

1 stop9h 02m

$369

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Thu 5/14

6:00 am-3:26 pm

1 stop11h 26m

Idaho Falls Fanning Field

Tue 5/19

6:00 am-4:35 pm

1 stop8h 35m

$479

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Wed 4/15

7:00 am-4:19 pm

1 stop11h 19m

Idaho Falls Fanning Field

Sat 4/18

6:00 am-5:50 pm

1 stop9h 50m

$479

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Wed 4/15

7:00 am-4:19 pm

1 stop11h 19m

Idaho Falls Fanning Field

Mon 4/27

6:00 am-6:20 pm

1 stop10h 20m

$479

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Fri 4/24

7:20 pm-3:29 pm

1 stop22h 09m

Idaho Falls Fanning Field

Mon 4/27

6:00 am-5:50 am

1 stop21h 50m

$482

BaltimoreIdaho Falls

BWI - IDA

BWIIDA

Baltimore/Washington

Tue 8/11

7:10 am-2:27 pm

1 stop9h 17m

Idaho Falls Fanning Field

Tue 8/18

6:50 pm-6:03 am

1 stop9h 13m

$484

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Tue 8/18

5:00 pm-10:14 pm

1 stop7h 14m

Idaho Falls Fanning Field

Sat 8/22

3:04 pm-9:13 am

2 stops16h 09m

$493

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Tue 7/28

6:30 am-1:25 pm

1 stop8h 55m

Idaho Falls Fanning Field

Tue 8/4

2:30 pm-12:45 am

1 stop8h 15m

$510

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Thu 4/23

7:20 am-12:26 pm

1 stop7h 06m

Idaho Falls Fanning Field

Wed 5/13

6:54 pm-9:16 am

2 stops12h 22m

$510

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/19

Showing 1-10 of 59 resultsSorted by cheapest first
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Compare providers for flights from Washington, D.C. to Idaho Falls

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Washington, D.C. to Idaho Falls in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Washington, D.C.-Idaho Falls flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C.-Idaho Falls flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C.-Idaho Falls flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C.-Idaho Falls flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C.-Idaho Falls flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Washington, D.C. to Idaho Falls

Have a flexible travel schedule? Discover the best time to fly to Idaho Falls from Washington, D.C. with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from Washington, D.C. to Idaho Falls?

Currently, February is the cheapest month in which you can book a flight from Washington, D.C. to Idaho Falls (average of $238). Flying from Washington, D.C. to Idaho Falls in May is currently the most expensive (average of $424). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Idaho Falls

Get insights into the airlines that provide service to Idaho Falls. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Idaho Falls. Reviews last updated March 23, 2026.
Read through reviews of airlines operating flights from Washington, D.C. to Idaho Falls, such as United Airlines and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,461 reviews

Entertainment

7.1

Food

6.6

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,461 reviews
United Airlines
7.4
Good
9,461 reviews

Entertainment

7.1

Food

6.6

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
American Airlines
7.1
Good
11,489 reviews
United Airlines
7.4
Good
9,461 reviews

Entertainment

7.1

Food

6.6

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. to Idaho Falls. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Idaho Falls from Washington, D.C.?

    Located just 3.8 mi from the city center, Idaho Falls Fanning Field is the airport most travelers will use when flying to Idaho Falls from Washington, D.C.. Booking flights from Washington, D.C. to Fanning Field (IDA) should be relatively easy as there are 0 daily inbound flights from Washington, D.C. from 3 different airlines.

  • How long is the flight from Washington, D.C. to Idaho Falls?

    Airlines like Delta, Alaska Airlines, and United Airlines fly from Washington, D.C. to Idaho Falls in about 7h 14m. The time it takes to get you to your destination can typically vary by up to 4h 12m. The distance from Washington, D.C. to Idaho Falls is about 1835 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Washington, D.C. to Idaho Falls round-trip?

    United Airlines, at $333, was found to be the cheapest airline from Washington, D.C. to Idaho Falls. An alternate airline flying to your destination would be American Airlines.

  • What are the most popular routes from Washington, D.C. to Idaho Falls?

    When deciding which route to take from Washington, D.C. to Idaho Falls consider Washington, D.C. Dulles Intl - Idaho Falls Fanning Field, Baltimore/Washington - Idaho Falls Fanning Field or Washington, D.C. Reagan-National - Idaho Falls Fanning Field as they are the most popular.

  • Can I find deals for flights from Washington, D.C. to Idaho Falls that include hotel bookings?

    Yes. In addition to deals on Washington, D.C. to Idaho Falls flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington, D.C. to Idaho Falls?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to Idaho Falls.

  • Can I find deals for business class flights from Washington, D.C. to Idaho Falls?

    Yes. Cheapflights offers flight deals from Washington, D.C. to Idaho Falls by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Washington, D.C. to Idaho Falls?

    Currently, February is the cheapest month in which you can book a flight from Washington, D.C. to Idaho Falls (average of $238). Flying from Washington, D.C. to Idaho Falls in May is currently the most expensive (average of $424). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Idaho Falls?

Book flights to Idaho Falls if you plan to visit one of these locations
Rexburg

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Top 3 airlines flying from Washington, D.C. to Idaho Falls

Discover the top 3 airlines that operate flights from Washington, D.C. to Idaho Falls. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$333Average$661FlexibilityNo cancel feeOn-time69%
DeltaCheapest$360Average$489FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$480Average$571FlexibilityNo cancel feeOn-time71%

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