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Idaho Falls

$212+ 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 1/31. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — IDA
Feb 24 — Mar 31
Tue 2/24
Tue 3/3
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 January 25, 2026.

This United Airlines deal was found by Cheapflights users on 1/23. 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.
Sat 4/259:55 am
IAD
-
IDA
1 stop8h 19m
United Airlines
Tue 4/282:30 pm
IDA
-
IAD
1 stop7h 04m
United Airlines
Deal found 1/23$308
This Alaska Airlines deal was found by Cheapflights users on 1/22. 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.
Tue 10/278:00 am
DCA
-
IDA
1 stop9h 29m
Alaska Airlines
Sat 10/316:15 am
IDA
-
DCA
1 stop7h 53m
Alaska Airlines
Deal found 1/22$309
This Alaska Airlines deal was found by Cheapflights users on 1/22. 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.
Tue 10/276:30 am
IAD
-
IDA
1 stop10h 59m
Alaska Airlines
Sat 10/316:15 am
IDA
-
IAD
1 stop9h 01m
Alaska Airlines
Deal found 1/22$309
This United Airlines deal was found by Cheapflights users on 1/24. 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.
Sat 10/314:10 pm
BWI
-
IDA
1 stop8h 43m
United Airlines
Wed 11/42:35 pm
IDA
-
BWI
1 stop6h 25m
United Airlines
Deal found 1/24$334
This United Airlines deal was found by Cheapflights users on 1/23. 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.
Sat 4/256:00 am
BWI
-
IDA
2 stops12h 14m
United Airlines
Tue 4/282:30 pm
IDA
-
BWI
1 stop6h 54m
United Airlines
Deal found 1/23$339
This Delta deal was found by Cheapflights users on 1/23. 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.
Wed 2/185:10 pm
DCA
-
IDA
1 stop7h 11m
Delta
Fri 2/276:35 pm
IDA
-
DCA
2 stops12h 35m
Delta
Deal found 1/23$339
This Alaska Airlines deal was found by Cheapflights users on 1/24. 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.
Thu 2/267:05 am
IAD
-
IDA
1 stop11h 38m
Alaska Airlines
Mon 3/25:20 pm
IDA
-
IAD
1 stop10h 20m
Alaska Airlines
Deal found 1/24$354
This American Airlines deal was found by Cheapflights users on 1/22. 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.
Sat 9/123:33 pm
DCA
-
IDA
1 stop7h 31m
American Airlines
Wed 9/161:44 pm
IDA
-
DCA
1 stop7h 39m
American Airlines
Deal found 1/22$359
This American Airlines deal was found by Cheapflights users on 1/24. 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 8/116:59 am
DCA
-
IDA
1 stop7h 11m
American Airlines
Tue 8/1812:46 pm
IDA
-
DCA
1 stop8h 54m
American Airlines
Deal found 1/24$379
This Delta deal was found by Cheapflights users on 1/23. 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.
Sat 4/252:40 pm
DCA
-
IDA
2 stops9h 55m
Delta
Tue 4/286:57 pm
IDA
-
DCA
2 stops12h 12m
Delta
Deal found 1/23$395
This Delta deal was found by Cheapflights users on 1/24. 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.
Wed 2/1812:38 pm
IAD
-
IDA
2 stops11h 43m
Delta
Fri 2/276:35 pm
IDA
-
IAD
2 stops13h 19m
Delta
Deal found 1/24$395
This Alaska Airlines deal was found by Cheapflights users on 1/23. 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 2/187:05 am
IAD
-
IDA
1 stop18h 31m
Alaska Airlines
Fri 2/275:20 pm
IDA
-
IAD
1 stop22h 00m
Alaska Airlines
Deal found 1/23$405

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 January 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$308
(United Airlines)

One-way from

$212
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$403
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
Highest demand for flights based on searches. 8% potential increase in price ($56 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 January 25, 2026.
Use the filters below to find and compare flights from Washington, D.C. to Idaho Falls that are best for you.

Fly from

Washington, D.C.

Fly to

Idaho Falls

Route

Depart

Return

Price

BaltimoreIdaho Falls

BWI - IDA

BWIIDA

Baltimore/Washington

Sat 4/25

6:00 am-4:14 pm

2 stops12h 14m

Idaho Falls Fanning Field

Tue 4/28

2:30 pm-11:24 pm

1 stop6h 54m

$339

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Thu 2/26

7:05 am-4:43 pm

1 stop11h 38m

Idaho Falls Fanning Field

Mon 3/2

5:20 pm-5:40 am

1 stop10h 20m

$354

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Wed 2/18

5:10 pm-10:21 pm

1 stop7h 11m

Idaho Falls Fanning Field

Fri 2/27

6:35 pm-9:10 am

2 stops12h 35m

$364

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Wed 2/18

12:38 pm-10:21 pm

2 stops11h 43m

Idaho Falls Fanning Field

Fri 2/27

6:35 pm-9:54 am

2 stops13h 19m

$395

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Wed 2/18

7:05 am-11:36 pm

1 stop18h 31m

Idaho Falls Fanning Field

Fri 2/27

5:20 pm-5:20 pm

1 stop22h 00m

$405

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Fri 2/6

1:44 pm-10:36 pm

2 stops10h 52m

Idaho Falls Fanning Field

Tue 2/10

7:20 am-9:30 pm

2 stops12h 10m

$415

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Wed 2/18

5:00 pm-11:36 pm

1 stop8h 36m

Idaho Falls Fanning Field

Fri 2/27

8:00 am-9:59 pm

1 stop11h 59m

$415

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Wed 2/4

3:10 pm-10:57 pm

2 stops9h 47m

Idaho Falls Fanning Field

Mon 2/9

6:35 pm-9:10 am

2 stops12h 35m

$415

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Wed 2/4

2:15 pm-10:57 pm

2 stops10h 42m

Idaho Falls Fanning Field

Mon 2/9

6:35 pm-9:13 am

2 stops12h 38m

$415

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Sat 4/25

6:00 am-1:13 pm

1 stop9h 13m

Idaho Falls Fanning Field

Tue 4/28

7:30 am-7:56 pm

2 stops10h 26m

$420

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/23

Showing 1-10 of 48 results
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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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*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 Expedia the most. Expedia 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 $260). Flying from Washington, D.C. to Idaho Falls in June is currently the most expensive (average of $438). 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 January 25, 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
9,198 reviews

Overall

7.4

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Food

6.6

Crew

8.1

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
9,198 reviews
United Airlines
7.4
Good
9,198 reviews

Overall

7.4

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Food

6.6

Crew

8.1

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
7.2
Good
11,197 reviews
United Airlines
7.4
Good
9,198 reviews

Overall

7.4

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Food

6.6

Crew

8.1

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 United Airlines, Alaska Airlines, and Delta fly from Washington, D.C. to Idaho Falls in about 7h 11m. The time it takes to get you to your destination can typically vary by up to 5h 03m. 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 $388, 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. United Airlines is currently priced 34% below the average price you’ll pay for this route.

  • 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, Washington, D.C. Reagan-National - Idaho Falls Fanning Field or Baltimore/Washington - 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 $260). Flying from Washington, D.C. to Idaho Falls in June is currently the most expensive (average of $438). 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 January 25, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$360Average$473FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$388Average$707FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$480Average$571FlexibilityNo cancel feeOn-time71%

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