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Idaho Falls

$321+ Cheap flights from Dulles Intl (IAD) 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 9/21. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — IDA
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Dulles Intl to Idaho Falls

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) 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 September 11, 2025.

Round-trip from

$412
(Hawaiian Airlines)

One-way from

$321
(American Airlines)

Popular in

March

Cheapest in

January

Average price

$474
From Washington, D.C. Dulles Intl to Idaho Falls Fanning Field
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One-way flight from Washington, D.C. Dulles Intl to Idaho Falls Fanning Field
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Highest demand for flights based on searches. 1% potential increase in price ($6 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($29 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Dulles Intl to Idaho Falls

Cheapest flights from Dulles Intl to Idaho Falls
Explore the most affordable flight options available from Dulles Intl to Idaho Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Hawaiian Airlines deal was found by Cheapflights users on 9/10. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/118:53 amIAD - IDA
1 stop8h 45mHawaiian Airlines
Sat 10/186:00 amIDA - IAD
1 stop10h 28mHawaiian Airlines
Deal found 9/10$412
This Alaska Airlines deal was found by Cheapflights users on 9/11. 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 10/216:25 amIAD - IDA
1 stop11h 13mAlaska Airlines
Fri 10/244:15 pmIDA - IAD
1 stop13h 18mAlaska Airlines
Deal found 9/11$413
This Alaska Airlines deal was found by Cheapflights users on 9/9. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/247:41 pmIAD - IDA
1 stop28h 57mAlaska Airlines
Sat 11/13:50 pmIDA - IAD
1 stop13h 33mAlaska Airlines
Deal found 9/9$442
This Alaska Airlines deal was found by Cheapflights users on 9/10. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/48:53 amIAD - IDA
1 stop8h 45mAlaska Airlines
Tue 10/76:00 amIDA - IAD
1 stop16h 23mAlaska Airlines
Deal found 9/10$472
This American Airlines deal was found by Cheapflights users on 9/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/119:19 amIAD - IDA
2 stops14h 29mAmerican Airlines
Sat 10/1812:55 pmIDA - IAD
2 stops8h 58mAmerican Airlines
Deal found 9/10$477
This American Airlines deal was found by Cheapflights users on 9/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/412:48 pmIAD - IDA
2 stops10h 37mAmerican Airlines
Tue 10/76:44 amIDA - IAD
1 stop8h 01mAmerican Airlines
Deal found 9/10$492
This United Airlines deal was found by Cheapflights users on 9/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1610:09 pmIAD - IDA
1 stop21h 06mUnited Airlines
Mon 10/205:56 pmIDA - IAD
1 stop9h 26mUnited Airlines
Deal found 9/10$499
This United Airlines deal was found by Cheapflights users on 9/11. 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.
Sat 10/410:09 pmIAD - IDA
1 stop17h 24mUnited Airlines
Sat 10/112:35 pmIDA - IAD
1 stop12h 47mUnited Airlines
Deal found 9/11$501
This Alaska Airlines deal was found by Cheapflights users on 9/9. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/186:25 amIAD - IDA
1 stop11h 13mAlaska Airlines
Fri 10/246:00 amIDA - IAD
1 stop16h 23mAlaska Airlines
Deal found 9/9$503
This United Airlines deal was found by Cheapflights users on 9/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/710:09 pmIAD - IDA
1 stop13h 39mUnited Airlines
Fri 10/107:00 amIDA - IAD
2 stops22h 29mUnited Airlines
Deal found 9/10$528

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl 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 September 11, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Idaho Falls that are best for you.

Fly from

Dulles Intl

Fly to

Idaho Falls

Route

Depart

Return

Price

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Tue 10/21

6:25 am-3:38 pm

1 stop11h 13m

Idaho Falls Fanning Field

Fri 10/24

4:15 pm-7:33 am

1 stop13h 18m

$413

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Fri 10/24

7:41 pm-10:38 pm

1 stop28h 57m

Idaho Falls Fanning Field

Sat 11/1

3:50 pm-7:23 am

1 stop13h 33m

$442

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Sat 10/4

8:53 am-3:38 pm

1 stop8h 45m

Idaho Falls Fanning Field

Tue 10/7

6:00 am-12:23 am

1 stop16h 23m

$472

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Sat 10/11

9:19 am-9:48 pm

2 stops14h 29m

Idaho Falls Fanning Field

Sat 10/18

12:55 pm-11:53 pm

2 stops8h 58m

$477

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Sat 10/4

12:48 pm-9:25 pm

2 stops10h 37m

Idaho Falls Fanning Field

Tue 10/7

6:44 am-4:45 pm

1 stop8h 01m

$492

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Thu 10/16

10:09 pm-9:48 am

1 stop13h 39m

Idaho Falls Fanning Field

Mon 10/20

5:56 pm-5:22 am

1 stop9h 26m

$499

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Sat 10/18

6:25 am-3:38 pm

1 stop11h 13m

Idaho Falls Fanning Field

Fri 10/24

6:00 am-12:23 am

1 stop16h 23m

$503

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Tue 10/7

10:09 pm-9:48 am

1 stop13h 39m

Idaho Falls Fanning Field

Fri 10/10

7:00 am-7:29 am

2 stops22h 29m

$528

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Mon 9/22

5:47 pm-10:48 pm

1 stop7h 01m

Idaho Falls Fanning Field

Wed 9/24

10:56 am-9:07 pm

1 stop8h 11m

$531

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Mon 11/24

3:59 pm-9:03 pm

1 stop7h 04m

Idaho Falls Fanning Field

Sat 11/29

9:35 pm-6:17 am

1 stop6h 42m

$532

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 13 results
1
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Best time to book a flight from Dulles Intl to Idaho Falls

Have a flexible travel schedule? Discover the best time to fly to Idaho Falls from Dulles Intl 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. Dulles Intl Airport to Idaho Falls

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

Currently, October is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Idaho Falls (average of $380). Flying from Washington, D.C. Dulles Intl Airport to Idaho Falls in December is currently the most expensive (average of $578). 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 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 September 11, 2025.
Read reviews from past customers who have flown United Airlines from Washington, D.C. Dulles Intl Airport to Idaho Falls. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,937 reviews

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.6

Crew

8.1

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
8,937 reviews
United Airlines
7.4
Good
8,937 reviews

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.6

Crew

8.1

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl 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. Dulles Intl?

    For a flight from Washington, D.C. Dulles Intl to Idaho Falls, you will be flying into Fanning Field. Idaho Falls Fanning Field (IDA) is just 3.8 mi from the center of the city. Fanning Field is the only Idaho Falls airport and it handles 0 inbound flights from Washington, D.C. Dulles Intl per day. 1 airline has flights to Idaho Falls Fanning Field from Washington, D.C. Dulles Intl on a regular basis.

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

    For as low as $413, Alaska Airlines can have you in Idaho Falls from Washington, D.C. Dulles Intl Airport in 11h 13m. The distance from Washington, D.C. Dulles Intl Airport to Idaho Falls is about 1811 mi. This flight may include one or multiple stops.

  • What is the cheapest airline to fly from Washington, D.C. Dulles Intl Airport to Idaho Falls round-trip?

    Our cheapest airline available from Washington, D.C. Dulles Intl Airport to Idaho Falls is United Airlines. Our recent data shows that you can find tickets from as low as $388 on this airline. United Airlines is currently priced 37% below the average price you’ll pay for this route.

  • Can I find deals for flights from Dulles Intl to Idaho Falls that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Idaho Falls flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Idaho Falls?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Idaho Falls.

  • Can I find deals for business class flights from Dulles Intl to Idaho Falls?

    Yes. Cheapflights offers flight deals from Dulles Intl 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. Dulles Intl Airport to Idaho Falls?

    Currently, October is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Idaho Falls (average of $380). Flying from Washington, D.C. Dulles Intl Airport to Idaho Falls in December is currently the most expensive (average of $578). 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 Idaho Falls?

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Alternative routes for Dulles Intl to Idaho Falls

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Dulles Intl to Idaho Falls

Discover the top airline that operate flights from Dulles Intl 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$388Average$667FlexibilityNo cancel feeOn-time69%

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