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Idaho Falls

$144+ 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 12/1. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — IDA
nov. 21 — nov. 281
vie. 11/21
vie. 11/28
1 adult, Economy
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Find 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 octubre 22, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/265:45 amBWI - IDA
1 stop12h 18mMultiple Airlines
lun. 12/17:58 pmIDA - BWI
2 stops35h 38mMultiple Airlines
Deal found 10/20$360
This Kiwi.com deal was found by Cheapflights users on 10/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/176:00 amBWI - IDA
1 stop9h 07mMultiple Airlines
vie. 11/286:57 pmIDA - BWI
2 stops27h 01mMultiple Airlines
Deal found 10/22$419
This Alaska Airlines deal was found by Cheapflights users on 10/19. 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.
mar. 11/47:38 amBWI - IDA
1 stop9h 35mAlaska Airlines
sáb. 11/86:05 amIDA - BWI
1 stop10h 11mAlaska Airlines
Deal found 10/19$505
This Alaska Airlines deal was found by Cheapflights users on 10/20. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/47:43 amIAD - IDA
1 stop9h 30mAlaska Airlines
sáb. 11/86:05 amIDA - IAD
1 stop8h 35mAlaska Airlines
Deal found 10/20$505
This Delta deal was found by Cheapflights users on 10/21. 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.
mié. 11/57:15 amBWI - IDA
1 stop7h 18mDelta
dom. 11/96:57 pmIDA - BWI
1 stop9h 01mDelta
Deal found 10/21$506
This United Airlines deal was found by Cheapflights users on 10/22. 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.
mié. 12/1710:10 pmIAD - IDA
1 stop13h 48mUnited Airlines
lun. 12/224:05 pmIDA - IAD
1 stop11h 14mUnited Airlines
Deal found 10/22$513
This Kiwi.com deal was found by Cheapflights users on 10/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/215:45 amBWI - IDA
1 stop11h 10mMultiple Airlines
vie. 11/286:57 pmIDA - BWI
2 stops27h 01mMultiple Airlines
Deal found 10/22$518
This Alaska Airlines deal was found by Cheapflights users on 10/19. 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.
mar. 11/45:00 pmDCA - IDA
1 stop8h 59mAlaska Airlines
sáb. 11/86:05 amIDA - DCA
1 stop8h 48mAlaska Airlines
Deal found 10/19$531
This Delta deal was found by Cheapflights users on 10/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/46:15 amIAD - IDA
1 stop8h 18mDelta
sáb. 11/86:53 pmIDA - IAD
2 stops12h 17mDelta
Deal found 10/20$536
This Alaska Airlines deal was found by Cheapflights users on 10/22. 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.
lun. 12/298:00 amDCA - IDA
1 stop18h 07mAlaska Airlines
lun. 1/56:00 amIDA - DCA
1 stop13h 59mAlaska Airlines
Deal found 10/22$538
This Alaska Airlines deal was found by Cheapflights users on 10/22. 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.
lun. 12/297:04 amBWI - IDA
1 stop19h 03mAlaska Airlines
lun. 1/52:43 pmIDA - BWI
1 stop13h 01mAlaska Airlines
Deal found 10/22$542
This United Airlines deal was found by Cheapflights users on 10/21. 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.
mar. 11/1810:12 pmIAD - IDA
2 stops17h 23mUnited Airlines
mar. 11/255:00 amIDA - IAD
1 stop6h 10mUnited Airlines
Deal found 10/21$548

Cheap 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 octubre 22, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$334
(Alaska Airlines)

One-way from

$144
(Kiwi.com)

Popular in

November

Cheapest in

January

Average price

$447
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
Highest demand for flights based on searches. 8% potential increase in price ($55 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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 octubre 22, 2025.
Use the filters below to find and compare flights from Washington, D.C. to Idaho Falls that are best for you.

Fly from

Washington, D.C.

Fly to

Idaho Falls

Route

Depart

Return

Price

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

mié. 2/18

8:00 am-10:38 pm

1 stop16h 38m

Idaho Falls Fanning Field

vie. 2/27

8:00 am-9:55 pm

1 stop11h 55m

$334

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

mié. 2/18

7:00 am-10:38 pm

1 stop17h 38m

Idaho Falls Fanning Field

vie. 2/27

8:00 am-5:55 am

1 stop19h 55m

$334

BaltimoreIdaho Falls

BWI - IDA

BWIIDA

Baltimore/Washington

mié. 11/26

5:45 am-4:03 pm

1 stop12h 18m

Idaho Falls Fanning Field

lun. 12/1

7:58 pm-9:36 am

2 stops35h 38m

$360

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

mié. 2/18

7:00 am-6:15 pm

2 stops13h 15m

Idaho Falls Fanning Field

vie. 2/27

6:45 pm-9:11 am

2 stops12h 26m

$400

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

mar. 3/10

7:15 am-12:31 pm

1 stop7h 16m

Idaho Falls Fanning Field

mié. 3/11

6:00 am-11:56 pm

2 stops15h 56m

$415

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

mar. 3/10

7:00 am-10:38 pm

1 stop17h 38m

Idaho Falls Fanning Field

mié. 3/11

4:00 pm-5:55 am

1 stop11h 55m

$434

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

mar. 3/10

7:00 am-3:23 pm

1 stop10h 23m

Idaho Falls Fanning Field

mié. 3/11

4:00 pm-5:55 am

1 stop11h 55m

$449

BaltimoreIdaho Falls

BWI - IDA

BWIIDA

Baltimore/Washington

lun. 11/17

6:00 am-1:07 pm

1 stop9h 07m

Idaho Falls Fanning Field

vie. 11/28

6:57 pm-11:19 pm

3 stops26h 22m

$459

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

mar. 3/10

8:00 am-10:38 pm

1 stop16h 38m

Idaho Falls Fanning Field

mié. 3/11

4:00 pm-9:55 pm

1 stop27h 55m

$488

BaltimoreIdaho Falls

BWI - IDA

BWIIDA

Baltimore/Washington

mar. 11/4

7:38 am-3:13 pm

1 stop9h 35m

Idaho Falls Fanning Field

sáb. 11/8

6:05 am-6:16 pm

1 stop10h 11m

$505

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/21

Showing 1-10 of 39 results
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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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice 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

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

Currently, September is the cheapest month in which you can book a flight from Washington, D.C. to Idaho Falls (average of $295). Flying from Washington, D.C. to Idaho Falls in December is currently the most expensive (average of $501). 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 WAS to IDA?

Find hourly flight availability from Washington, D.C. to Idaho Falls. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated octubre 22, 2025.

A simple way to save on the total cost of your ticket is to fly from Washington, D.C. to Idaho Falls in the evening. If you’re flexible enough to do this you can expect to save up to 21% on your trip compared to booking a flight at noon.

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

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 octubre 22, 2025.
Read through reviews of airlines operating flights from Washington, D.C. to Idaho Falls, such as Delta, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
7,981 reviews

Overall

7.9

Boarding

8.2

Food

7.3

Entertainment

7.9

Crew

8.5

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,981 reviews
Delta
7.9
Good
7,981 reviews

Overall

7.9

Boarding

8.2

Food

7.3

Entertainment

7.9

Crew

8.5

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,990 reviews
Delta
7.9
Good
7,981 reviews

Overall

7.9

Boarding

8.2

Food

7.3

Entertainment

7.9

Crew

8.5

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
American Airlines
7.2
Good
11,028 reviews
Delta
7.9
Good
7,981 reviews

Overall

7.9

Boarding

8.2

Food

7.3

Entertainment

7.9

Crew

8.5

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

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 3 different airlines.

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

    Airlines like Alaska Airlines and Delta fly from Washington, D.C. to Idaho Falls in about 13h 15m. The time it takes to get you to your destination can typically vary by up to 3h 23m. 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?

    Delta, at $354, was found to be the cheapest airline from Washington, D.C. to Idaho Falls.Alternate airlines to your destination round-trip include United Airlines and American Airlines. Delta is currently priced 42% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Washington, D.C. to Idaho Falls one-way?

    The cheapest airlines for a one-way flight from Washington, D.C. to Idaho Falls are Alaska Airlines ($204), United Airlines ($208), and American Airlines ($291).

  • 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.

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

    Currently, September is the cheapest month in which you can book a flight from Washington, D.C. to Idaho Falls (average of $295). Flying from Washington, D.C. to Idaho Falls in December is currently the most expensive (average of $501). 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

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

Discover the top 3 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 octubre 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$334Average$697FlexibilityNo cancel feeOn-time71%
DeltaCheapest$334Average$478FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$408Average$728FlexibilityNo cancel feeOn-time69%

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