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Washington, D.C.

$142+ 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 7/3. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — WAS
Jun 5 — Jun 121
Fri 6/5
Fri 6/12
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 May 6, 2026.

This United Airlines deal was found by Cheapflights users on 5/3. 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 9/24:10 pm
IDA
-
IAD
1 stop6h 30m
United Airlines
Mon 9/76:30 am
IAD
-
IDA
1 stop8h 54m
United Airlines
Deal found 5/3$349
This American Airlines deal was found by Cheapflights users on 5/4. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/221:43 pm
IDA
-
DCA
1 stop7h 52m
American Airlines
Wed 10/286:59 am
DCA
-
IDA
1 stop7h 21m
American Airlines
Deal found 5/4$349
This Expedia deal was found by Cheapflights users on 5/3. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/24:14 pm
IDA
-
BWI
1 stop21h 20m
Alaska Airlines
Mon 9/74:34 pm
BWI
-
IDA
1 stop22h 32m
Alaska Airlines
Deal found 5/3$369
This Alaska Airlines deal was found by Cheapflights users on 5/5. 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 5/236:00 am
IDA
-
IAD
1 stop8h 38m
Alaska Airlines
Tue 5/266:00 am
IAD
-
IDA
1 stop11h 26m
Alaska Airlines
Deal found 5/5$374
This Alaska Airlines deal was found by Cheapflights users on 5/1. 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 5/286:00 am
IDA
-
IAD
1 stop8h 35m
Alaska Airlines
Mon 6/16:00 am
IAD
-
IDA
1 stop11h 26m
Alaska Airlines
Deal found 5/1$399
This Alaska Airlines deal was found by Cheapflights users on 5/5. 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 5/281:54 pm
IDA
-
BWI
1 stop14h 34m
Alaska Airlines
Mon 6/14:17 pm
BWI
-
IDA
1 stop23h 00m
Alaska Airlines
Deal found 5/5$399
This Delta deal was found by Cheapflights users on 5/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/206:54 pm
IDA
-
IAD
2 stops12h 22m
Delta
Sun 5/2411:15 am
IAD
-
IDA
2 stops13h 27m
Delta
Deal found 5/4$409
This American Airlines deal was found by Cheapflights users on 5/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/171:58 pm
IDA
-
IAD
1 stop6h 34m
American Airlines
Tue 12/89:15 am
IAD
-
IDA
2 stops15h 21m
American Airlines
Deal found 5/2$415
This Expedia deal was found by Cheapflights users on 5/4. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:09 am
IDA
-
BWI
1 stop9h 03m
Alaska Airlines
Wed 10/286:12 pm
BWI
-
IDA
1 stop23h 23m
Alaska Airlines
Deal found 5/4$419
This Delta deal was found by Cheapflights users on 5/1. 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 5/163:16 pm
IDA
-
BWI
1 stop6h 09m
Delta
Wed 5/201:59 pm
BWI
-
IDA
2 stops10h 43m
Delta
Deal found 5/1$433
This Delta deal was found by Cheapflights users on 5/1. 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 5/163:16 pm
IDA
-
IAD
1 stop6h 16m
Delta
Wed 5/2012:40 pm
IAD
-
IDA
2 stops12h 02m
Delta
Deal found 5/1$434
This Delta deal was found by Cheapflights users on 5/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/206:54 pm
IDA
-
DCA
2 stops13h 06m
Delta
Sun 5/245:59 pm
DCA
-
IDA
1 stop6h 43m
Delta
Deal found 5/4$434

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 May 6, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$349
(United Airlines)

One-way from

$142
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$578
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. 28% potential increase in price ($223 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 May 6, 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 9/2

4:10 pm-12:40 am

1 stop6h 30m

Washington, D.C. Dulles Intl

Mon 9/7

6:30 am-1:24 pm

1 stop8h 54m

$349

Idaho FallsWashington, D.C.

IDA - IAD

IDAIAD

Idaho Falls Fanning Field

Sat 5/23

6:00 am-4:38 pm

1 stop8h 38m

Washington, D.C. Dulles Intl

Tue 5/26

6:00 am-3:26 pm

1 stop11h 26m

$374

Idaho FallsWashington, D.C.

IDA - IAD

IDAIAD

Idaho Falls Fanning Field

Thu 5/28

6:00 am-4:35 pm

1 stop8h 35m

Washington, D.C. Dulles Intl

Mon 6/1

6:00 am-3:26 pm

1 stop11h 26m

$399

Idaho FallsBaltimore

IDA - BWI

IDABWI

Idaho Falls Fanning Field

Thu 6/4

4:03 pm-3:17 pm

1 stop21h 14m

Baltimore/Washington

Sun 6/7

7:48 am-3:26 pm

1 stop9h 38m

$399

Idaho FallsWashington, D.C.

IDA - IAD

IDAIAD

Idaho Falls Fanning Field

Sat 5/16

3:16 pm-11:32 pm

1 stop6h 16m

Washington, D.C. Dulles Intl

Wed 5/20

12:40 pm-10:42 pm

2 stops12h 02m

$434

Idaho FallsWashington, D.C.

IDA - IAD

IDAIAD

Idaho Falls Fanning Field

Wed 5/20

3:16 pm-11:32 pm

1 stop6h 16m

Washington, D.C. Dulles Intl

Sun 5/24

11:15 am-10:42 pm

2 stops13h 27m

$434

Idaho FallsWashington, D.C.

IDA - IAD

IDAIAD

Idaho Falls Fanning Field

Fri 8/21

2:30 pm-12:40 am

1 stop8h 10m

Washington, D.C. Dulles Intl

Mon 8/24

6:30 am-1:24 pm

1 stop8h 54m

$449

Idaho FallsWashington, D.C.

IDA - IAD

IDAIAD

Idaho Falls Fanning Field

Thu 6/4

1:54 pm-11:59 pm

1 stop8h 05m

Washington, D.C. Dulles Intl

Sun 6/7

6:00 am-3:26 pm

1 stop11h 26m

$449

Idaho FallsWashington, D.C.

IDA - IAD

IDAIAD

Idaho Falls Fanning Field

Fri 6/5

1:54 pm-11:59 pm

1 stop8h 05m

Washington, D.C. Dulles Intl

Sat 6/6

6:00 am-3:26 pm

1 stop11h 26m

$449

Idaho FallsBaltimore

IDA - BWI

IDABWI

Idaho Falls Fanning Field

Fri 8/21

6:50 pm-6:03 am

1 stop9h 13m

Baltimore/Washington

Mon 8/24

1:00 pm-10:14 pm

2 stops11h 14m

$457

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/4

Showing 1-10 of 50 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 May.
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.

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

Currently, February is the cheapest month in which you can book a flight from Idaho Falls to Washington, D.C. (average of $265). Flying from Idaho Falls to Washington, D.C. in November is currently the most expensive (average of $715). 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.

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 May 6, 2026.
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
9,684 reviews

Crew

8.1

Food

6.6

Overall

7.4

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
United Airlines
7.4
Good
9,684 reviews
United Airlines
7.4
Good
9,684 reviews

Crew

8.1

Food

6.6

Overall

7.4

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.

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.?

    United Airlines, Alaska Airlines, and Delta can get you from Idaho Falls to Washington, D.C. in just under 6h 16m. Your travel time can differ by up to 2h 22m. 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?

    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 19% 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 - 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, February is the cheapest month in which you can book a flight from Idaho Falls to Washington, D.C. (average of $265). Flying from Idaho Falls to Washington, D.C. in November is currently the most expensive (average of $715). 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
Tysons
Owings Mills
Springfield
Arlington
Silver Spring
Herndon
Rockville
Hyattsville
Manassas
Fredericksburg
Woodbridge
Hanover
Laurel
Largo
Upper Marlboro
Waldorf
Clinton
Hunt Valley
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 May 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$446Average$642FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$500Average$906FlexibilityNo cancel feeOn-time71%

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