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Idaho Falls

$198+ 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 6/5. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — IDA
May 5 — May 121
Mon 5/5
Mon 5/12
1 adult, Economy
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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 April 30, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$371
(Delta)

One-way from

$198
(United Airlines)

Popular in

November

Cheapest in

February

Average price

$738
Provider with most accurate pricing for Washington, D.C. (WAS)-Idaho Falls Fanning Field flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Idaho Falls Fanning Field flights.
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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. 5% potential increase in price ($42 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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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 April 30, 2025.

This Delta deal was found by Cheapflights users on 4/29. 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 5/271:00 pmIAD - IDA
2 stops11h 51mDelta
Tue 6/36:50 pmIDA - IAD
2 stops12h 24mDelta
Deal found 4/29$371
This Alaska Airlines deal was found by Cheapflights users on 4/29. 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 5/276:15 pmIAD - IDA
1 stop30h 19mAlaska Airlines
Tue 6/34:20 pmIDA - IAD
1 stop13h 16mAlaska Airlines
Deal found 4/29$391
This American Airlines deal was found by Cheapflights users on 4/28. 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 8/206:59 amDCA - IDA
1 stop7h 11mAmerican Airlines
Wed 8/2712:46 pmIDA - DCA
1 stop7h 29mAmerican Airlines
Deal found 4/28$395
This United Airlines deal was found by Cheapflights users on 4/28. 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.
Fri 6/65:36 pmIAD - IDA
1 stop7h 15mUnited Airlines
Mon 6/92:25 pmIDA - IAD
1 stop8h 09mUnited Airlines
Deal found 4/28$395
This Delta deal was found by Cheapflights users on 4/28. 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.
Fri 7/412:24 pmDCA - IDA
2 stops12h 31mDelta
Mon 7/146:52 pmIDA - DCA
2 stops11h 44mDelta
Deal found 4/28$405
This American Airlines deal was found by Cheapflights users on 4/28. 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 8/206:00 amBWI - IDA
1 stop8h 10mAmerican Airlines
Wed 8/2712:46 pmIDA - BWI
1 stop9h 13mAmerican Airlines
Deal found 4/28$407
This Delta deal was found by Cheapflights users on 4/29. 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.
Sun 8/3111:50 amBWI - IDA
2 stops12h 25mDelta
Thu 9/47:00 pmIDA - BWI
1 stop9h 06mDelta
Deal found 4/29$412
This Alaska Airlines deal was found by Cheapflights users on 4/29. 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 5/308:00 amDCA - IDA
1 stop9h 40mAlaska Airlines
Wed 6/46:00 amIDA - DCA
2 stops13h 05mAlaska Airlines
Deal found 4/29$428
This Alaska Airlines deal was found by Cheapflights users on 4/29. 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.
Thu 9/117:22 pmBWI - IDA
1 stop29h 17mAlaska Airlines
Tue 9/166:13 amIDA - BWI
1 stop10h 09mAlaska Airlines
Deal found 4/29$460
This United Airlines deal was found by Cheapflights users on 4/29. 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.
Fri 7/254:20 pmBWI - IDA
1 stop8h 31mUnited Airlines
Wed 7/306:03 pmIDA - BWI
1 stop9h 07mUnited Airlines
Deal found 4/29$497
This United Airlines deal was found by Cheapflights users on 4/28. 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 5/157:25 amDCA - IDA
2 stops10h 00mUnited Airlines
Mon 5/195:00 amIDA - DCA
2 stops16h 59mUnited Airlines
Deal found 4/28$589
This American Airlines deal was found by Cheapflights users on 4/29. 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.
Thu 8/286:27 amIAD - IDA
1 stop7h 49mAmerican Airlines
Mon 9/112:46 pmIDA - IAD
2 stops9h 13mAmerican Airlines
Deal found 4/29$636

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 April 30, 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

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Tue 5/27

1:00 pm-10:51 pm

2 stops11h 51m

Idaho Falls Fanning Field

Tue 6/3

6:50 pm-9:14 am

2 stops12h 24m

$371

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Tue 5/27

6:15 pm-10:34 pm

1 stop30h 19m

Idaho Falls Fanning Field

Tue 6/3

4:20 pm-7:36 am

1 stop13h 16m

$391

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Wed 8/20

6:59 am-12:10 pm

1 stop7h 11m

Idaho Falls Fanning Field

Wed 8/27

12:46 pm-10:15 pm

1 stop7h 29m

$395

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Fri 6/6

5:36 pm-10:51 pm

1 stop7h 15m

Idaho Falls Fanning Field

Mon 6/9

2:25 pm-12:34 am

1 stop8h 09m

$395

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Fri 7/4

12:24 pm-10:55 pm

2 stops12h 31m

Idaho Falls Fanning Field

Mon 7/14

6:52 pm-8:36 am

2 stops11h 44m

$405

BaltimoreIdaho Falls

BWI - IDA

BWIIDA

Baltimore/Washington

Wed 8/20

6:00 am-12:10 pm

1 stop8h 10m

Idaho Falls Fanning Field

Wed 8/27

12:46 pm-11:59 pm

1 stop9h 13m

$407

BaltimoreIdaho Falls

BWI - IDA

BWIIDA

Baltimore/Washington

Sun 8/31

11:50 am-10:15 pm

2 stops12h 25m

Idaho Falls Fanning Field

Thu 9/4

7:00 pm-6:06 am

1 stop9h 06m

$412

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Fri 5/30

8:00 am-3:40 pm

1 stop9h 40m

Idaho Falls Fanning Field

Wed 6/4

6:00 am-9:05 pm

2 stops13h 05m

$428

BaltimoreIdaho Falls

BWI - IDA

BWIIDA

Baltimore/Washington

Thu 9/11

7:22 pm-10:39 pm

1 stop29h 17m

Idaho Falls Fanning Field

Tue 9/16

6:13 am-6:22 pm

1 stop10h 09m

$460

BaltimoreIdaho Falls

BWI - IDA

BWIIDA

Baltimore/Washington

Fri 7/25

4:20 pm-10:51 pm

1 stop8h 31m

Idaho Falls Fanning Field

Wed 7/30

6:03 pm-5:10 am

1 stop9h 07m

$497

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 25 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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 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 eDreams the most. eDreams 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, October is the cheapest month in which you can book a flight from Washington, D.C. to Idaho Falls (average of $380). Flying from Washington, D.C. to Idaho Falls in July is currently the most expensive (average of $628). 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 April 30, 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 morning. If you’re flexible enough to do this you can expect to save up to 6% on your trip compared to booking a flight at noon.

Rainfall in Idaho Falls by month

Plan your trip to Idaho Falls by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Idaho Falls ranges from 0.6 - 2.0 inches per month. May is typically the wettest month, when rainfall can reach 2.0 in. July is typically the driest time to visit Idaho Falls when rainfall is around 0.6 in.

Temperature in Idaho Falls by month

Plan your trip to Idaho Falls by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Idaho Falls, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 April 30, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Delta and Hawaiian Airlines from Washington, D.C. to Idaho Falls to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,968 reviews

Entertainment

7.1

Boarding

8.2

Food

7.1

Crew

8.5

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
9,968 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Entertainment

7.1

Boarding

8.2

Food

7.1

Crew

8.5

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,936 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Entertainment

7.1

Boarding

8.2

Food

7.1

Crew

8.5

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,406 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Entertainment

7.1

Boarding

8.2

Food

7.1

Crew

8.5

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,696 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Entertainment

7.1

Boarding

8.2

Food

7.1

Crew

8.5

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Entertainment

7.1

Boarding

8.2

Food

7.1

Crew

8.5

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

  • What are the cheapest airlines flying from Washington, D.C. to Idaho Falls round-trip?

    Delta, at $371, was found to be the cheapest airline from Washington, D.C. to Idaho Falls.Alternate airlines to your destination round-trip include Alaska Airlines and American Airlines. Delta is currently priced 45% 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 United Airlines ($198), Delta ($209), and Alaska Airlines ($226).

  • 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, Washington, D.C. Reagan-National - Idaho Falls Fanning Field or Baltimore/Washington - 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, October is the cheapest month in which you can book a flight from Washington, D.C. to Idaho Falls (average of $380). Flying from Washington, D.C. to Idaho Falls in July is currently the most expensive (average of $628). 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 April 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$334Average$645FlexibilityNo cancel feeOn-time71%
DeltaCheapest$334Average$473FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$408Average$799FlexibilityNo cancel feeOn-time69%

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