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Washington, D.C.

$155+ 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 6/23. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — WAS
Mar 6 — Mar 131
Fri 3/6
Fri 3/13
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 February 4, 2026.

This Expedia deal was found by Cheapflights users on 2/1. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/255:20 pm
IDA
-
BWI
1 stop22h 26m
Alaska Airlines
Mon 3/26:46 pm
BWI
-
IDA
1 stop23h 57m
Alaska Airlines
Deal found 2/1$293
This Alaska Airlines deal was found by Cheapflights users on 2/3. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:15 am
IDA
-
IAD
1 stop9h 01m
Alaska Airlines
Thu 10/296:30 am
IAD
-
IDA
1 stop10h 59m
Alaska Airlines
Deal found 2/3$309
This Alaska Airlines deal was found by Cheapflights users on 2/3. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:15 am
IDA
-
BWI
1 stop9h 51m
Alaska Airlines
Sat 10/317:51 am
BWI
-
IDA
1 stop9h 38m
Alaska Airlines
Deal found 2/3$309
This Delta deal was found by Cheapflights users on 2/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/66:58 pm
IDA
-
BWI
1 stop9h 02m
Delta
Tue 5/127:00 am
BWI
-
IDA
1 stop9h 34m
Delta
Deal found 2/2$334
This United Airlines deal was found by Cheapflights users on 2/2. 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.
Tue 10/275:00 am
IDA
-
BWI
2 stops10h 13m
United Airlines
Sat 10/314:10 pm
BWI
-
IDA
1 stop8h 43m
United Airlines
Deal found 2/2$339
This Travelocity deal was found by Cheapflights users on 2/2. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/96:15 am
IDA
-
IAD
1 stop9h 01m
Alaska Airlines
Wed 9/169:00 am
IAD
-
IDA
1 stop8h 29m
Alaska Airlines
Deal found 2/2$349
This Alaska Airlines deal was found by Cheapflights users on 2/3. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:15 am
IDA
-
DCA
1 stop7h 53m
Alaska Airlines
Sat 10/318:00 am
DCA
-
IDA
1 stop9h 29m
Alaska Airlines
Deal found 2/3$349
This Alaska Airlines deal was found by Cheapflights users on 2/2. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/66:00 am
IDA
-
IAD
1 stop10h 20m
Alaska Airlines
Tue 5/129:00 am
IAD
-
IDA
1 stop8h 29m
Alaska Airlines
Deal found 2/2$367
This Expedia deal was found by Cheapflights users on 2/1. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/255:20 pm
IDA
-
IAD
2 stops22h 07m
Alaska Airlines
Mon 3/26:27 pm
IAD
-
IDA
1 stop24h 16m
Alaska Airlines
Deal found 2/1$371
This American Airlines deal was found by Cheapflights users on 2/2. 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.
Wed 9/91:44 pm
IDA
-
DCA
1 stop7h 39m
American Airlines
Wed 9/166:45 am
DCA
-
IDA
1 stop7h 28m
American Airlines
Deal found 2/2$379
This Expedia deal was found by Cheapflights users on 2/1. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/255:20 pm
IDA
-
DCA
1 stop20h 46m
Alaska Airlines
Mon 3/26:59 pm
DCA
-
IDA
2 stops23h 44m
Alaska Airlines
Deal found 2/1$385
This Travelocity deal was found by Cheapflights users on 2/2. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/96:15 am
IDA
-
BWI
1 stop9h 51m
Alaska Airlines
Wed 9/167:51 am
BWI
-
IDA
1 stop9h 38m
Alaska Airlines
Deal found 2/2$389

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 February 4, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$293
(Expedia)

One-way from

$155
(United Airlines)

Popular in

December

Cheapest in

February

Average price

$417
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 ($214 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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 February 4, 2026.
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

Wed 2/25

5:20 pm-5:46 pm

1 stop22h 26m

Baltimore/Washington

Mon 3/2

6:46 pm-4:43 pm

1 stop23h 57m

$293

Idaho FallsBaltimore

IDA - BWI

IDABWI

Idaho Falls Fanning Field

Wed 5/6

6:58 pm-6:00 am

1 stop9h 02m

Baltimore/Washington

Tue 5/12

7:00 am-2:34 pm

1 stop9h 34m

$334

Idaho FallsWashington, D.C.

IDA - IAD

IDAIAD

Idaho Falls Fanning Field

Wed 5/6

6:00 am-6:20 pm

1 stop10h 20m

Washington, D.C. Dulles Intl

Tue 5/12

9:00 am-3:29 pm

1 stop8h 29m

$367

Idaho FallsBaltimore

IDA - BWI

IDABWI

Idaho Falls Fanning Field

Wed 2/25

2:40 pm-11:25 pm

1 stop6h 45m

Baltimore/Washington

Mon 3/2

6:30 am-1:30 pm

2 stops9h 00m

$400

Idaho FallsBaltimore

IDA - BWI

IDABWI

Idaho Falls Fanning Field

Wed 4/22

6:58 pm-6:00 am

1 stop9h 02m

Baltimore/Washington

Tue 4/28

7:15 am-12:26 pm

1 stop7h 11m

$422

Idaho FallsWashington, D.C.

IDA - IAD

IDAIAD

Idaho Falls Fanning Field

Wed 2/25

5:20 pm-5:20 pm

1 stop22h 00m

Washington, D.C. Dulles Intl

Sun 3/1

7:05 am-11:36 pm

1 stop18h 31m

$423

Idaho FallsBaltimore

IDA - BWI

IDABWI

Idaho Falls Fanning Field

Wed 5/6

6:00 am-6:16 pm

1 stop10h 16m

Baltimore/Washington

Mon 5/11

7:04 am-3:29 pm

1 stop10h 25m

$434

Idaho FallsWashington, D.C.

IDA - IAD

IDAIAD

Idaho Falls Fanning Field

Wed 5/6

6:00 am-6:20 pm

1 stop10h 20m

Washington, D.C. Dulles Intl

Mon 5/11

7:20 pm-10:40 pm

1 stop29h 20m

$435

Idaho FallsWashington, D.C.

IDA - DCA

IDADCA

Idaho Falls Fanning Field

Wed 4/8

1:43 pm-11:59 pm

1 stop8h 16m

Washington, D.C. Reagan-National

Tue 4/14

1:45 pm-11:39 pm

2 stops11h 54m

$436

Idaho FallsWashington, D.C.

IDA - DCA

IDADCA

Idaho Falls Fanning Field

Wed 5/6

6:58 pm-11:24 pm

2 stops26h 26m

Washington, D.C. Reagan-National

Tue 5/12

5:59 pm-10:42 pm

1 stop6h 43m

$443

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/3

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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 February.
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, March is the cheapest month in which you can book a flight from Idaho Falls to Washington, D.C. (average of $160). 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.

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 February 4, 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
9,236 reviews

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Entertainment

7.1

Food

6.6

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
9,236 reviews
United Airlines
7.4
Good
9,236 reviews

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Entertainment

7.1

Food

6.6

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 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 3 different airlines.

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

    Alaska Airlines, Delta, and United Airlines can get you from Idaho Falls to Washington, D.C. in just under 6h 45m. Your travel time can differ by up to 15h 41m. 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?

    Delta, at $194, was found to be the cheapest airline from Idaho Falls to Washington, D.C..Alternate airlines to your destination round-trip include United Airlines and American Airlines. Delta is priced at 65% 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. Reagan-National, Idaho Falls Fanning Field - Baltimore/Washington or Idaho Falls Fanning Field - Washington, D.C. Dulles Intl 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 $160). 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
Silver Spring
Herndon
Fredericksburg
Hanover
Linthicum Heights
Rockville
Laurel
Towson
Upper Marlboro
Manassas
Largo
Bowie
McLean
Clinton

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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

Discover the top 3 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 February 4, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$194Average$552FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$394Average$625FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$437Average$770FlexibilityNo cancel feeOn-time71%

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