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Washington, D.C.

$200+ 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 1/7. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — WAS
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
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 December 4, 2025.

This United Airlines deal was found by Cheapflights users on 12/4. 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 12/195:00 amIDA - IAD
1 stop6h 16mUnited Airlines
Tue 12/235:20 pmIAD - IDA
1 stop7h 39mUnited Airlines
Deal found 12/4$511
This United Airlines deal was found by Cheapflights users on 12/3. 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 12/186:40 amIDA - IAD
1 stop6h 54mUnited Airlines
Mon 12/222:24 pmIAD - IDA
1 stop8h 50mUnited Airlines
Deal found 12/3$621
This United Airlines deal was found by Cheapflights users on 12/3. 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.
Wed 12/102:45 pmIDA - IAD
1 stop6h 30mUnited Airlines
Fri 12/124:00 pmIAD - IDA
1 stop7h 12mUnited Airlines
Deal found 12/3$631
This American Airlines deal was found by Cheapflights users on 12/3. 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.
Wed 12/101:58 pmIDA - IAD
1 stop7h 01mAmerican Airlines
Fri 12/1211:25 amIAD - IDA
2 stops13h 11mAmerican Airlines
Deal found 12/3$636
This United Airlines deal was found by Cheapflights users on 12/3. 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 12/186:40 amIDA - DCA
1 stop6h 19mUnited Airlines
Thu 1/14:17 pmDCA - IDA
1 stop6h 57mUnited Airlines
Deal found 12/3$680
This United Airlines deal was found by Cheapflights users on 12/4. 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 12/196:40 amIDA - DCA
1 stop6h 19mUnited Airlines
Tue 12/2312:00 pmDCA - IDA
2 stops11h 14mUnited Airlines
Deal found 12/4$794
This American Airlines deal was found by Cheapflights users on 12/3. 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.
Wed 12/177:00 amIDA - DCA
2 stops11h 58mAmerican Airlines
Sun 12/211:44 pmDCA - IDA
2 stops10h 37mAmerican Airlines
Deal found 12/3$829
This United Airlines deal was found by Cheapflights users on 12/3. 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.
Wed 12/177:00 amIDA - IAD
1 stop6h 01mUnited Airlines
Fri 12/196:20 amIAD - IDA
1 stop9h 10mUnited Airlines
Deal found 12/3$830
This United Airlines deal was found by Cheapflights users on 12/2. 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.
Wed 12/310:58 amIDA - IAD
1 stop6h 10mUnited Airlines
Mon 12/810:23 pmIAD - IDA
2 stops17h 12mUnited Airlines
Deal found 12/2$847
This United Airlines deal was found by Cheapflights users on 12/2. 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.
Wed 12/177:00 amIDA - IAD
1 stop6h 01mUnited Airlines
Sun 12/215:20 pmIAD - IDA
1 stop7h 39mUnited Airlines
Deal found 12/2$881
This Delta deal was found by Cheapflights users on 12/3. 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 12/177:06 pmIDA - BWI
1 stop8h 54mDelta
Sun 12/212:00 pmBWI - IDA
2 stops10h 52mDelta
Deal found 12/3$918
This American Airlines deal was found by Cheapflights users on 12/3. 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.
Wed 12/177:00 amIDA - IAD
2 stops14h 08mAmerican Airlines
Fri 12/199:12 amIAD - IDA
2 stops15h 09mAmerican Airlines
Deal found 12/3$924

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 December 4, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$392
(Alaska Airlines)

One-way from

$200
(American Airlines)
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

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 December 4, 2025.
Use the filters below to find and compare flights from Idaho Falls to Washington, D.C. that are best for you.

Fly from

Idaho Falls

Fly to

Washington, D.C.

Route

Depart

Return

Price

Idaho FallsBaltimore

IDA - BWI

IDABWI

Idaho Falls Fanning Field

Fri 1/30

6:58 pm-6:14 pm

1 stop21h 16m

Baltimore/Washington

Tue 2/3

7:14 pm-6:18 pm

1 stop25h 04m

$392

Idaho FallsWashington, D.C.

IDA - IAD

IDAIAD

Idaho Falls Fanning Field

Wed 1/7

7:20 am-11:12 pm

2 stops13h 52m

Washington, D.C. Dulles Intl

Thu 1/15

6:00 am-1:37 pm

1 stop9h 37m

$407

Idaho FallsWashington, D.C.

IDA - DCA

IDADCA

Idaho Falls Fanning Field

Tue 1/20

7:20 am-10:03 pm

2 stops12h 43m

Washington, D.C. Reagan-National

Fri 1/23

6:30 am-1:37 pm

1 stop9h 07m

$407

Idaho FallsWashington, D.C.

IDA - DCA

IDADCA

Idaho Falls Fanning Field

Tue 1/20

9:00 am-4:09 pm

1 stop29h 09m

Washington, D.C. Reagan-National

Fri 1/23

5:01 pm-6:18 pm

1 stop27h 17m

$423

Idaho FallsWashington, D.C.

IDA - DCA

IDADCA

Idaho Falls Fanning Field

Mon 1/26

6:58 pm-9:59 pm

1 stop25h 01m

Washington, D.C. Reagan-National

Thu 1/29

8:00 am-10:59 pm

1 stop16h 59m

$424

Idaho FallsBaltimore

IDA - BWI

IDABWI

Idaho Falls Fanning Field

Wed 1/7

7:20 am-11:21 pm

2 stops14h 01m

Baltimore/Washington

Thu 1/15

6:07 am-1:37 pm

1 stop9h 30m

$426

Idaho FallsWashington, D.C.

IDA - IAD

IDAIAD

Idaho Falls Fanning Field

Fri 1/9

6:58 pm-4:26 pm

1 stop19h 28m

Washington, D.C. Dulles Intl

Tue 1/13

6:04 pm-6:18 pm

1 stop26h 14m

$448

Idaho FallsWashington, D.C.

IDA - IAD

IDAIAD

Idaho Falls Fanning Field

Sun 1/25

6:58 pm-4:26 pm

1 stop19h 28m

Washington, D.C. Dulles Intl

Wed 1/28

6:04 pm-6:18 pm

1 stop26h 14m

$463

Idaho FallsWashington, D.C.

IDA - IAD

IDAIAD

Idaho Falls Fanning Field

Sun 1/25

5:25 am-11:10 pm

2 stops15h 45m

Washington, D.C. Dulles Intl

Wed 1/28

7:30 am-5:51 pm

2 stops12h 21m

$482

Idaho FallsBaltimore

IDA - BWI

IDABWI

Idaho Falls Fanning Field

Fri 1/30

2:40 pm-2:11 pm

2 stops21h 31m

Baltimore/Washington

Tue 2/3

8:23 am-9:07 pm

1 stop14h 44m

$486

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/2

Showing 1-10 of 31 results
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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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Idaho Falls-Washington, D.C. flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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.

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

Currently, March is the cheapest month in which you can book a flight from Idaho Falls to Washington, D.C. (average of $219). Flying from Idaho Falls to Washington, D.C. in July is currently the most expensive (average of $522). 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.

What is the cheapest time of day to fly from IDA to WAS?

Find hourly flight availability from Idaho Falls to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 4, 2025.

One of the essential ways to save on airfare from Idaho Falls to Washington, D.C. is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 21% on airfare.

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 December 4, 2025.
Get a feel of what it's like to fly with 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.
United Airlines
7.4
Good
9,066 reviews

Food

6.6

Comfort

7.3

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
United Airlines
7.4
Good
9,066 reviews
United Airlines
7.4
Good
9,066 reviews

Food

6.6

Comfort

7.3

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.

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 United Airlines can get you from Idaho Falls to Washington, D.C. in just under 13h 52m. Your travel time can differ by up to 7h 39m. The distance between Idaho Falls and Washington, D.C. is about 1811 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?

    American Airlines, at $437, was found to be the cheapest airline from Idaho Falls to Washington, D.C.. An alternate airline flying to your destination would be United Airlines.

  • 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 - Baltimore/Washington or Idaho Falls Fanning Field - Washington, D.C. Reagan-National 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.

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

    Currently, March is the cheapest month in which you can book a flight from Idaho Falls to Washington, D.C. (average of $219). Flying from Idaho Falls to Washington, D.C. in July is currently the most expensive (average of $522). 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 Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
Woodbridge
Tysons
Arlington
Owings Mills
Springfield
Hanover
Silver Spring
Fredericksburg
Fairfax
Linthicum Heights
Manassas
Laurel
Towson
National Harbor
Bowie
Largo
McLean
Clinton
Cordova

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 December 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$437Average$607FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$446Average$595FlexibilityNo cancel feeOn-time69%

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