HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Idaho Falls

$182+ 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 7/16. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — IDA
Jun 22 — Jun 291
Mon 6/22
Mon 6/29
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Washington, D.C. to Idaho Falls with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 May 23, 2026.

This Alaska Airlines deal was found by Cheapflights users on 5/19. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/174:19 pm
BWI
-
IDA
1 stop22h 47m
Alaska Airlines
Wed 8/263:57 pm
IDA
-
BWI
1 stop21h 43m
Alaska Airlines
Deal found 5/19$349
This Alaska Airlines deal was found by Cheapflights users on 5/18. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/145:14 pm
IAD
-
IDA
1 stop8h 28m
Alaska Airlines
Wed 11/186:04 am
IDA
-
IAD
1 stop8h 10m
Alaska Airlines
Deal found 5/18$349
This American Airlines deal was found by Cheapflights users on 5/19. 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.
Mon 8/176:10 am
IAD
-
IDA
1 stop7h 20m
American Airlines
Wed 8/267:00 am
IDA
-
IAD
1 stop9h 27m
American Airlines
Deal found 5/19$374
This Delta deal was found by Cheapflights users on 5/21. 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 8/1712:30 pm
BWI
-
IDA
2 stops12h 02m
Delta
Wed 8/267:00 pm
IDA
-
BWI
1 stop9h 20m
Delta
Deal found 5/21$379
This Alaska Airlines deal was found by Cheapflights users on 5/19. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/147:00 am
BWI
-
IDA
1 stop10h 17m
Alaska Airlines
Wed 11/186:04 am
IDA
-
BWI
1 stop9h 08m
Alaska Airlines
Deal found 5/19$399
This American Airlines deal was found by Cheapflights users on 5/18. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/146:04 am
IAD
-
IDA
1 stop9h 23m
American Airlines
Wed 11/187:15 am
IDA
-
IAD
2 stops10h 06m
American Airlines
Deal found 5/18$415
This American Airlines deal was found by Cheapflights users on 5/21. 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.
Tue 10/136:14 am
BWI
-
IDA
1 stop8h 06m
American Airlines
Tue 10/2012:12 pm
IDA
-
BWI
2 stops9h 49m
American Airlines
Deal found 5/21$429
This Delta deal was found by Cheapflights users on 5/21. 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.
Tue 10/137:15 am
IAD
-
IDA
1 stop7h 12m
Delta
Tue 10/206:45 pm
IDA
-
IAD
2 stops12h 26m
Delta
Deal found 5/21$434
This Expedia deal was found by Cheapflights users on 5/20. 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 7/156:03 am
IAD
-
IDA
1 stop11h 34m
Alaska Airlines
Wed 7/227:15 am
IDA
-
IAD
1 stop7h 56m
Alaska Airlines
Deal found 5/20$449
This United Airlines deal was found by Cheapflights users on 5/20. 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.
Sun 5/316:30 am
IAD
-
IDA
1 stop8h 55m
United Airlines
Fri 6/54:10 pm
IDA
-
IAD
1 stop6h 35m
United Airlines
Deal found 5/20$454
This Expedia deal was found by Cheapflights users on 5/20. 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 7/154:19 pm
BWI
-
IDA
1 stop22h 47m
Alaska Airlines
Wed 7/221:43 pm
IDA
-
BWI
1 stop13h 58m
Alaska Airlines
Deal found 5/20$458
This Delta deal was found by Cheapflights users on 5/18. 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.
Sat 5/307:00 am
BWI
-
IDA
1 stop9h 34m
Delta
Wed 6/36:54 pm
IDA
-
BWI
1 stop8h 51m
Delta
Deal found 5/18$459

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 May 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$349
(Travelocity)

One-way from

$182
(Delta)
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

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 May 23, 2026.
Use the filters below to find and compare flights from Washington, D.C. to Idaho Falls that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Tue 10/13

7:15 am-12:27 pm

1 stop7h 12m

Idaho Falls Fanning Field

Tue 10/20

6:45 pm-9:11 am

2 stops12h 26m

$434

BaltimoreIdaho Falls

BWI - IDA

BWIIDA

Baltimore/Washington

Sat 5/30

7:00 am-2:34 pm

1 stop9h 34m

Idaho Falls Fanning Field

Wed 6/3

6:54 pm-5:45 am

1 stop8h 51m

$459

BaltimoreIdaho Falls

BWI - IDA

BWIIDA

Baltimore/Washington

Wed 5/27

12:31 pm-10:42 pm

2 stops12h 11m

Idaho Falls Fanning Field

Wed 6/3

6:54 pm-5:45 am

1 stop8h 51m

$462

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Mon 5/25

7:45 am-6:14 pm

2 stops12h 29m

Idaho Falls Fanning Field

Wed 6/3

11:30 am-10:59 pm

2 stops9h 29m

$464

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Sat 5/30

8:00 am-6:14 pm

2 stops12h 14m

Idaho Falls Fanning Field

Wed 6/3

11:30 am-10:59 pm

2 stops9h 29m

$464

BaltimoreIdaho Falls

BWI - IDA

BWIIDA

Baltimore/Washington

Mon 5/25

7:00 am-2:34 pm

1 stop9h 34m

Idaho Falls Fanning Field

Wed 6/3

11:30 am-11:17 pm

2 stops9h 47m

$469

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Mon 6/1

6:30 am-1:25 pm

1 stop8h 55m

Idaho Falls Fanning Field

Fri 6/5

4:10 pm-12:45 am

1 stop6h 35m

$481
Quickest round-trip

BaltimoreIdaho Falls

BWI - IDA

BWIIDA

Baltimore/Washington

Wed 5/27

8:30 am-1:25 pm

1 stop6h 55m

Idaho Falls Fanning Field

Wed 6/3

2:30 pm-11:30 pm

1 stop7h 00m

$495

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Thu 5/28

11:00 am-10:42 pm

2 stops13h 42m

Idaho Falls Fanning Field

Wed 6/3

11:30 am-10:59 pm

2 stops9h 29m

$551

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Mon 6/1

5:59 pm-10:42 pm

1 stop6h 43m

Idaho Falls Fanning Field

Fri 6/5

6:54 pm-9:11 am

2 stops12h 17m

$559

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/22

Showing 1-10 of 59 resultsSorted by cheapest first
1
2
3
...
6

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 May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust 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 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 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 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
No data available for this route at this time. Please check back soon.

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 May 23, 2026.
Read through reviews of airlines operating flights from Washington, D.C. to Idaho Falls, such as Delta,United Airlines, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,444 reviews

Food

7.2

Crew

8.5

Overall

7.9

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
7.9
Good
8,444 reviews
Delta
7.9
Good
8,444 reviews

Food

7.2

Crew

8.5

Overall

7.9

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
9,751 reviews
Delta
7.9
Good
8,444 reviews

Food

7.2

Crew

8.5

Overall

7.9

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
American Airlines
7.1
Good
11,642 reviews
Delta
7.9
Good
8,444 reviews

Food

7.2

Crew

8.5

Overall

7.9

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 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 2 different airlines.

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

    Airlines like Delta, United Airlines, and Alaska Airlines fly from Washington, D.C. to Idaho Falls in about 7h 12m. The time it takes to get you to your destination can typically vary by up to 11h 24m. The distance from Washington, D.C. to Idaho Falls 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 Washington, D.C. to Idaho Falls round-trip?

    United Airlines, at $275, was found to be the cheapest airline from Washington, D.C. to Idaho Falls. An alternate airline flying to your destination would be Alaska Airlines.

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

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

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

Discover the top 2 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 May 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$275Average$668FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$433Average$708FlexibilityNo cancel feeOn-time75%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.