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Idaho Falls

$126+ 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 9/3. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — IDA
ago. 12 — ago. 191
mié. 8/12
mié. 8/19
1 adult, Economy
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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 julio 13, 2026.

This Kiwi.com deal was found by Cheapflights users on 7/10. 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. 8/109:50 am
IAD
-
IDA
1 stop8h 15m
Multiple Airlines
lun. 8/1710:54 pm
IDA
-
IAD
1 stop31h 10m
Multiple Airlines
Deal found 7/10$320
This Kiwi.com deal was found by Cheapflights users on 7/9. 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.
jue. 9/38:59 am
IAD
-
IDA
1 stop25h 55m
Multiple Airlines
vie. 9/116:37 pm
IDA
-
IAD
2 stops20h 59m
Multiple Airlines
Deal found 7/9$342
This Kiwi.com deal was found by Cheapflights users on 7/10. 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. 8/109:50 am
IAD
-
IDA
1 stop8h 15m
Multiple Airlines
mié. 8/1911:46 am
IDA
-
IAD
2 stops28h 43m
Multiple Airlines
Deal found 7/10$346
This Delta deal was found by Cheapflights users on 7/9. 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. 9/167:35 am
BWI
-
IDA
1 stop6h 40m
Delta
mié. 9/236:57 pm
IDA
-
BWI
1 stop9h 21m
Delta
Deal found 7/9$349
This Delta deal was found by Cheapflights users on 7/9. 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. 9/1512:30 pm
BWI
-
IDA
2 stops11h 52m
Delta
dom. 9/206:57 pm
IDA
-
BWI
1 stop9h 21m
Delta
Deal found 7/9$354
This Delta deal was found by Cheapflights users on 7/12. 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. 8/185:59 pm
DCA
-
IDA
1 stop6h 33m
Delta
mar. 8/257:00 pm
IDA
-
DCA
2 stops13h 09m
Delta
Deal found 7/12$354
This Kiwi.com deal was found by Cheapflights users on 7/9. 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.
jue. 9/38:59 am
IAD
-
IDA
1 stop25h 55m
Multiple Airlines
lun. 9/78:36 pm
IDA
-
IAD
1 stop9h 28m
Multiple Airlines
Deal found 7/9$364
This Delta deal was found by Cheapflights users on 7/9. 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.
dom. 9/207:35 am
BWI
-
IDA
1 stop6h 40m
Delta
jue. 9/246:57 pm
IDA
-
BWI
1 stop9h 21m
Delta
Deal found 7/9$373
This Kiwi.com deal was found by Cheapflights users on 7/10. 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. 8/109:50 am
IAD
-
IDA
1 stop8h 15m
Multiple Airlines
jue. 8/207:54 pm
IDA
-
IAD
2 stops24h 58m
Multiple Airlines
Deal found 7/10$377
This Delta deal was found by Cheapflights users on 7/9. 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.
lun. 9/2112:30 pm
BWI
-
IDA
2 stops11h 52m
Delta
jue. 9/246:57 pm
IDA
-
BWI
1 stop9h 21m
Delta
Deal found 7/9$378
This Kiwi.com deal was found by Cheapflights users on 7/10. 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.
jue. 8/139:50 am
IAD
-
IDA
2 stops25h 09m
Multiple Airlines
lun. 8/1710:54 pm
IDA
-
IAD
1 stop31h 10m
Multiple Airlines
Deal found 7/10$378
This Delta deal was found by Cheapflights users on 7/13. 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.
vie. 12/117:15 am
IAD
-
IDA
1 stop7h 12m
Delta
mar. 1/56:45 pm
IDA
-
IAD
2 stops12h 26m
Delta
Deal found 7/13$379

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 julio 13, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$320
(Kiwi.com)

One-way from

$126
(Kiwi.com)
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 julio 13, 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

BaltimoreIdaho Falls

BWI - IDA

BWIIDA

Baltimore/Washington

vie. 10/9

7:15 am-12:22 pm

1 stop7h 07m

Idaho Falls Fanning Field

dom. 10/11

6:56 pm-6:00 am

1 stop9h 04m

$349

BaltimoreIdaho Falls

BWI - IDA

BWIIDA

Baltimore/Washington

vie. 12/11

7:10 am-12:27 pm

1 stop7h 17m

Idaho Falls Fanning Field

mar. 1/5

6:00 am-5:03 pm

2 stops9h 03m

$354

BaltimoreIdaho Falls

BWI - IDA

BWIIDA

Baltimore/Washington

jue. 1/7

7:10 am-12:27 pm

1 stop7h 17m

Idaho Falls Fanning Field

lun. 1/11

6:45 pm-9:16 am

2 stops12h 31m

$379
Quickest round-trip

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

sáb. 8/22

6:15 am-11:38 am

1 stop7h 23m

Idaho Falls Fanning Field

vie. 8/28

4:04 pm-12:32 am

1 stop6h 28m

$391

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

sáb. 8/22

5:59 pm-10:32 pm

1 stop6h 33m

Idaho Falls Fanning Field

mié. 8/26

6:00 am-4:44 pm

1 stop8h 44m

$404

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

mar. 8/18

12:23 pm-10:32 pm

2 stops12h 09m

Idaho Falls Fanning Field

mar. 8/25

7:00 pm-10:09 am

2 stops13h 09m

$414

BaltimoreIdaho Falls

BWI - IDA

BWIIDA

Baltimore/Washington

mar. 11/10

7:00 am-3:17 pm

1 stop10h 17m

Idaho Falls Fanning Field

sáb. 11/14

6:04 am-5:12 pm

1 stop9h 08m

$419

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

mar. 9/29

5:48 pm-10:22 pm

1 stop6h 34m

Idaho Falls Fanning Field

lun. 10/5

6:57 pm-10:09 am

2 stops13h 12m

$434

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

mié. 8/12

7:00 am-10:32 pm

1 stop17h 32m

Idaho Falls Fanning Field

mar. 8/18

7:00 pm-9:20 am

2 stops12h 20m

$468

BaltimoreIdaho Falls

BWI - IDA

BWIIDA

Baltimore/Washington

mié. 9/16

7:50 am-3:20 pm

1 stop9h 30m

Idaho Falls Fanning Field

sáb. 9/26

2:01 pm-6:30 am

1 stop14h 29m

$471

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/10

Showing 1-10 of 44 resultsSorted by cheapest first
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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 July.
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 julio 13, 2026.
Read through reviews of airlines operating flights from Washington, D.C. to Idaho Falls, such as United Airlines and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,983 reviews

Overall

7.4

Crew

8.1

Boarding

7.7

Entertainment

7.1

Food

6.7

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
United Airlines
7.4
Good
9,983 reviews
United Airlines
7.4
Good
9,983 reviews

Overall

7.4

Crew

8.1

Boarding

7.7

Entertainment

7.1

Food

6.7

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
American Airlines
7.1
Good
11,810 reviews
United Airlines
7.4
Good
9,983 reviews

Overall

7.4

Crew

8.1

Boarding

7.7

Entertainment

7.1

Food

6.7

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

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 07m. The time it takes to get you to your destination can typically vary by up to 3h 10m. The distance from Washington, D.C. to Idaho Falls 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 Washington, D.C. to Idaho Falls round-trip?

    United Airlines, at $333, 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
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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 julio 13, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$333Average$668FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$433Average$708FlexibilityNo cancel feeOn-time75%

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