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Washington, D.C.

$105+ Cheap flights from Idaho Falls (IDA) to Washington, D.C. (WAS)

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 8/28. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — WAS
Jul 22 — Jul 291
Wed 7/22
Wed 7/29
1 adult, Economy
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Cheap flight deals from Idaho Falls to Washington, D.C.

Cheapest flights from Idaho Falls to Washington, D.C.
Explore the most affordable flight options available from Idaho Falls to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 22, 2026.

This Delta deal was found by Cheapflights users on 6/18. 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 8/187:00 pm
IDA
-
DCA
2 stops13h 09m
Delta
Thu 8/205:59 pm
DCA
-
IDA
1 stop6h 33m
Delta
Deal found 6/18$379
This Alaska Airlines deal was found by Cheapflights users on 6/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/281:46 pm
IDA
-
IAD
1 stop8h 13m
Alaska Airlines
Sat 10/317:00 am
IAD
-
IDA
1 stop10h 35m
Alaska Airlines
Deal found 6/21$384
This Delta deal was found by Cheapflights users on 6/21. 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.
Mon 10/196:45 pm
IDA
-
DCA
2 stops13h 39m
Delta
Thu 10/221:45 pm
DCA
-
IDA
2 stops10h 34m
Delta
Deal found 6/21$414
This Alaska Airlines deal was found by Cheapflights users on 6/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:09 am
IDA
-
BWI
1 stop9h 03m
Alaska Airlines
Sat 10/317:00 am
BWI
-
IDA
1 stop10h 35m
Alaska Airlines
Deal found 6/21$419
This American Airlines deal was found by Cheapflights users on 6/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/212:20 pm
IDA
-
BWI
1 stop7h 21m
American Airlines
Mon 8/247:26 am
BWI
-
IDA
1 stop8h 24m
American Airlines
Deal found 6/21$428
This Delta deal was found by Cheapflights users on 6/21. 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.
Mon 10/196:45 pm
IDA
-
IAD
2 stops12h 26m
Delta
Thu 10/221:00 pm
IAD
-
IDA
2 stops11h 19m
Delta
Deal found 6/21$439
This American Airlines deal was found by Cheapflights users on 6/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/211:43 pm
IDA
-
DCA
1 stop8h 16m
American Airlines
Mon 8/247:35 am
DCA
-
IDA
1 stop7h 34m
American Airlines
Deal found 6/19$440
This Delta deal was found by Cheapflights users on 6/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/207:00 pm
IDA
-
BWI
1 stop9h 20m
Delta
Tue 8/2511:25 am
BWI
-
IDA
2 stops8h 55m
Delta
Deal found 6/19$444
This United Airlines deal was found by Cheapflights users on 6/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/272:32 pm
IDA
-
BWI
1 stop6h 25m
United Airlines
Sat 10/316:10 am
BWI
-
IDA
2 stops11h 13m
United Airlines
Deal found 6/21$454
This Alaska Airlines deal was found by Cheapflights users on 6/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/191:46 pm
IDA
-
IAD
1 stop8h 13m
Alaska Airlines
Thu 10/227:00 am
IAD
-
IDA
1 stop10h 35m
Alaska Airlines
Deal found 6/21$474
This Alaska Airlines deal was found by Cheapflights users on 6/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/191:46 pm
IDA
-
BWI
1 stop13h 34m
Alaska Airlines
Thu 10/227:00 am
BWI
-
IDA
1 stop10h 35m
Alaska Airlines
Deal found 6/21$474
This United Airlines deal was found by Cheapflights users on 6/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/202:25 pm
IDA
-
BWI
1 stop6h 31m
United Airlines
Tue 8/258:30 am
BWI
-
IDA
1 stop6h 59m
United Airlines
Deal found 6/19$481

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

Discover tips and strategies to find the most affordable flight options for your journey from Idaho Falls (IDA) to Washington, D.C. (WAS). 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 June 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$379
(Delta)

One-way from

$105
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$509
Provider with most accurate pricing for Idaho Falls Fanning Field-Washington, D.C. (WAS) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Idaho Falls Fanning Field-Washington, D.C. (WAS) flights.
Search Deals
From Idaho Falls Fanning Field to Washington, D.C. (WAS)
Search Deals
One-way flight from Idaho Falls Fanning Field to Washington, D.C. (WAS)
Search Deals
Highest demand for flights based on searches. 27% potential increase in price ($210 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($27 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Idaho Falls to Washington, D.C. 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 June 22, 2026.
Use the filters below to find and compare flights from Idaho Falls to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Idaho FallsWashington, D.C.

IDA - IAD

IDAIAD

Idaho Falls Fanning Field

Wed 10/28

1:46 pm-11:59 pm

1 stop8h 13m

Washington, D.C. Dulles Intl

Sat 10/31

7:00 am-3:35 pm

1 stop10h 35m

$384
Quickest round-trip

Idaho FallsBaltimore

IDA - BWI

IDABWI

Idaho Falls Fanning Field

Fri 8/21

2:20 pm-11:41 pm

1 stop7h 21m

Baltimore/Washington

Mon 8/24

7:03 am-1:09 pm

1 stop8h 06m

$428

Idaho FallsWashington, D.C.

IDA - IAD

IDAIAD

Idaho Falls Fanning Field

Mon 10/19

6:45 pm-9:11 am

2 stops12h 26m

Washington, D.C. Dulles Intl

Thu 10/22

1:00 pm-10:19 pm

2 stops11h 19m

$439

Idaho FallsWashington, D.C.

IDA - DCA

IDADCA

Idaho Falls Fanning Field

Fri 8/21

1:43 pm-11:59 pm

1 stop8h 16m

Washington, D.C. Reagan-National

Mon 8/24

7:35 am-1:09 pm

1 stop7h 34m

$440

Idaho FallsBaltimore

IDA - BWI

IDABWI

Idaho Falls Fanning Field

Thu 8/20

7:00 pm-6:20 am

1 stop9h 20m

Baltimore/Washington

Tue 8/25

11:25 am-6:20 pm

2 stops8h 55m

$444

Idaho FallsWashington, D.C.

IDA - IAD

IDAIAD

Idaho Falls Fanning Field

Mon 10/19

1:46 pm-11:59 pm

1 stop8h 13m

Washington, D.C. Dulles Intl

Thu 10/22

7:00 am-3:35 pm

1 stop10h 35m

$474

Idaho FallsWashington, D.C.

IDA - DCA

IDADCA

Idaho Falls Fanning Field

Tue 8/18

7:00 pm-10:09 am

2 stops13h 09m

Washington, D.C. Reagan-National

Thu 8/20

12:23 pm-10:32 pm

2 stops12h 09m

$497

Idaho FallsWashington, D.C.

IDA - IAD

IDAIAD

Idaho Falls Fanning Field

Fri 8/21

4:04 pm-12:32 am

1 stop6h 28m

Washington, D.C. Dulles Intl

Mon 8/24

6:30 am-1:29 pm

1 stop8h 59m

$509

Idaho FallsBaltimore

IDA - BWI

IDABWI

Idaho Falls Fanning Field

Tue 8/11

7:00 pm-6:20 am

1 stop9h 20m

Baltimore/Washington

Sat 8/15

7:39 am-2:35 pm

1 stop8h 56m

$527

Idaho FallsBaltimore

IDA - BWI

IDABWI

Idaho Falls Fanning Field

Wed 7/1

7:00 pm-5:49 am

1 stop8h 49m

Baltimore/Washington

Fri 7/10

7:15 am-2:36 pm

1 stop9h 21m

$547

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/21

Showing 1-10 of 51 resultsSorted by cheapest first
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Compare providers for flights from Idaho Falls to Washington, D.C.

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 Idaho Falls to Washington, D.C. in June.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust 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 Idaho Falls-Washington, D.C. flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Idaho Falls-Washington, D.C. flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Idaho Falls-Washington, D.C. flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Idaho Falls-Washington, D.C. 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 Idaho Falls-Washington, D.C. 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 Idaho Falls to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Idaho Falls 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 Idaho Falls to Washington, D.C.

How much does it cost to fly round-trip from Idaho Falls to Washington, D.C.?

Reviews of airlines servicing Washington, D.C.

Get insights into the airlines that provide service to Washington, D.C.. 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 Washington, D.C.. Reviews last updated June 22, 2026.
Get a feel of what it's like to fly with Delta and United Airlines from Idaho Falls to Washington, D.C. by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.8
Good
8,421 reviews

Overall

7.8

Crew

8.5

Food

7.2

Comfort

7.8

Entertainment

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Delta
7.8
Good
8,421 reviews
Delta
7.8
Good
8,421 reviews

Overall

7.8

Crew

8.5

Food

7.2

Comfort

7.8

Entertainment

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
United Airlines
7.4
Good
9,875 reviews
Delta
7.8
Good
8,421 reviews

Overall

7.8

Crew

8.5

Food

7.2

Comfort

7.8

Entertainment

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional

Related info for your journey

Find useful and relevant information for your journey from Idaho Falls to Washington, D.C.. 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 from for flights from Idaho Falls to 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 Washington, D.C. from Idaho Falls. Booking flights from Fanning Field (IDA) to Washington, D.C. should be relatively easy as there are 0 daily outbound flights to Washington, D.C. from 2 different airlines.

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

    Alaska Airlines, American Airlines, and Delta can get you from Idaho Falls to Washington, D.C. in just under 7h 21m. Your travel time can differ by up to 5h 05m. The distance between Idaho Falls and Washington, D.C. is about 1845 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 Idaho Falls to Washington, D.C. round-trip?

    United Airlines, at $446, was found to be the cheapest airline from Idaho Falls to Washington, D.C.. An alternate airline flying to your destination would be American Airlines. United Airlines is priced at 21% lower than the current average price of a flight leaving 3 months from now.

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

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

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

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

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

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

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

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

See more FAQs

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
Arlington
Tysons
Owings Mills
Springfield
Lanham
Reston
Herndon
Rockville
Hyattsville
Manassas
Fredericksburg
Laurel
Hanover
Falls Church
Waldorf
Silver Spring
Largo
Clinton
Hunt Valley

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Idaho Falls to Washington, D.C.

Discover the top 2 airlines that operate flights from Idaho Falls to Washington, D.C.. 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 June 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$446Average$614FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$620Average$906FlexibilityNo cancel feeOn-time71%

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