What is the cheapest airline that flies from Washington, D.C. to Idaho Falls Fanning Field?

American Airlines, Delta, and Alaska Airlines are the most popular carriers operating from Washington, D.C. to Idaho Falls Fanning Field

What airlines fly to Idaho Falls?

United Airlines, American Airlines and Delta are the top three most popular airlines that fly to Idaho Falls from Washington, D.C. according to our data. United Airlines is the first choice among our users, with 56% of people opting to fly with this airline when traveling to Idaho Falls. Keep in mind that there are 3 different airlines that fly to Idaho Falls on a routine basis, so you have a few additional options to choose from.

How long does it take to fly to Idaho Falls?

If you’re flying from a popular airport in Washington, D.C., such as Washington, D.C. or Baltimore, and flying into Idaho Falls, then you can expect flight times to average 5h 25m and 6h 25m, respectively.

When did momondo last update prices for flights from Washington, D.C. to Idaho Falls Fanning Field Airport?

Prices for flights from Washington, D.C. to Idaho Falls Fanning Field Airport are refreshed on a daily basis.

How many operators does momondo search for flights from Washington, D.C. to Idaho Falls Fanning Field Airport?

There are 3 operators available for flights from Washington, D.C. to Idaho Falls Fanning Field Airport as of October 2025.

How old do you have to be to fly from Washington, D.C. to Idaho Falls Fanning Field Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington, D.C. to Idaho Falls Fanning Field Airport.

What documentation or ID do you need to fly to Idaho Falls Fanning Field Airport?

The travel and health documents you'll need for your trip to Idaho Falls Fanning Field Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Idaho Falls Fanning Field Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$161 Cheap Flights from Washington, D.C. to Idaho Falls in 2025/26

Q: What is the typical price of a round-trip flight between Washington, D.C. and Idaho Falls?

Prices are currently low for flights on this route. Typical prices usually range from $856 to $952. The lowest price recently found on this route was $392.

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Find the cheapest flights from Washington, D.C. to Idaho Falls

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Cheap round-trip flights

Enter your travel dates to find the best prices.

5:01 pm - 6:18 pmDCA-IDA

27h 17m1 stop

9:00 am - 4:09 pmIDA-DCA

29h 09m1 stop

$392Alaska Airlines

Find Deal

Mon, Jan 19 - Mon, Feb 9

8:00 am - 10:38 pmDCA-IDA

16h 38m1 stop

8:00 am - 9:55 pmIDA-DCA

11h 55m1 stop

$402Alaska Airlines

Find Deal

Wed, Feb 18 - Fri, Feb 27

7:05 am - 12:37 pmIAD-IDA

7h 32m1 stop

1:17 pm - 11:29 pmIDA-IAD

8h 12m1 stop

$415Delta

Find Deal

Mon, Dec 8 - Fri, Dec 12

11:24 am - 11:07 pmIAD-IDA

13h 43m2 stops

2:02 pm - 10:51 pmIDA-IAD

6h 49m1 stop

$420American Airlines

Find Deal

Wed, Feb 18 - Fri, Feb 27

4:15 pm - 9:12 pmBWI-IDA

6h 57m1 stop

2:45 pm - 11:00 pmIDA-BWI

6h 15m1 stop

$421United Airlines

Find Deal

Mon, Dec 8 - Fri, Dec 12

7:15 am - 12:31 pmIAD-IDA

7h 16m1 stop

6:00 am - 11:56 pmIDA-IAD

15h 56m2 stops

$439Delta

Find Deal

Tue, Mar 10 - Wed, Mar 11

6:02 am - 1:27 pmBWI-IDA

9h 25m1 stop

7:00 am - 10:08 pmIDA-BWI

13h 08m2 stops

$478American Airlines

Find Deal

Mon, Dec 8 - Fri, Dec 12

8:15 am - 3:16 pmBWI-IDA

9h 01m1 stop

10:50 am - 7:21 pmIDA-BWI

6h 31m1 stop

$506United Airlines

Find Deal

Wed, Nov 12 - Sun, Nov 16

6:00 am - 4:08 pmBWI-IDA

12h 08m1 stop

7:56 pm - 5:24 amIDA-BWI

7h 28m1 stop

$557Multiple Airlines

Find Deal

Fri, Nov 7 - Mon, Nov 10

6:00 am - 4:08 pmBWI-IDA

12h 08m1 stop

7:56 pm - 10:24 amIDA-BWI

36h 28m2 stops

$570Multiple Airlines

Find Deal

Fri, Nov 7 - Mon, Nov 10

Alaska Airlines flights from Washington, D.C. to Idaho Falls

Our best Alaska Airlines deals on Washington, D.C. to Idaho Falls flight tickets

Alaska Airlines

Jan 19

DCA5:01 pmWashington, D.C. Reagan-National

27h 17m

1 stop

IDA6:18 pmIdaho Falls Fanning Field

Feb 9

IDA9:00 amIdaho Falls Fanning Field

29h 09m

1 stop

DCA4:09 pmWashington, D.C. Reagan-National

$392

Find similar

Alaska Airlines

Feb 18

DCA8:00 amWashington, D.C. Reagan-National

16h 38m

1 stop

IDA10:38 pmIdaho Falls Fanning Field

Feb 27

IDA8:00 amIdaho Falls Fanning Field

11h 55m

1 stop

DCA9:55 pmWashington, D.C. Reagan-National

$402

Find similar

Alaska Airlines

Feb 18

DCA8:00 amWashington, D.C. Reagan-National

9h 23m

1 stop

IDA3:23 pmIdaho Falls Fanning Field

Feb 27

IDA8:00 amIdaho Falls Fanning Field

31h 32m

2 stops

DCA5:32 pmWashington, D.C. Reagan-National

$434

Find similar

American Airlines flights from Washington, D.C. to Idaho Falls

Our best American Airlines deals on Washington, D.C. to Idaho Falls flight tickets

American Airlines

Feb 18

IAD11:24 amWashington, D.C. Dulles Intl

13h 43m

2 stops

IDA11:07 pmIdaho Falls Fanning Field

Feb 27

IDA2:02 pmIdaho Falls Fanning Field

6h 49m

1 stop

IAD10:51 pmWashington, D.C. Dulles Intl

$420

Find similar

American Airlines

Dec 8

BWI6:02 amBaltimore/Washington

9h 25m

1 stop

IDA1:27 pmIdaho Falls Fanning Field

Dec 12

IDA7:00 amIdaho Falls Fanning Field

13h 08m

2 stops

BWI10:08 pmBaltimore/Washington

$478

Find similar

American Airlines

Jan 19

DCA6:30 amWashington, D.C. Reagan-National

9h 07m

1 stop

IDA1:37 pmIdaho Falls Fanning Field

Feb 9

IDA7:20 amIdaho Falls Fanning Field

12h 43m

2 stops

DCA10:03 pmWashington, D.C. Reagan-National

$489

Find similar

momondo Fare Finder

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

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Mon 1/19

5:01 pm-6:18 pm

1 stop27h 17m

Idaho Falls Fanning Field

Mon 2/9

9:00 am-4:09 pm

1 stop29h 09m

$392

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Wed 2/18

8:00 am-10:38 pm

1 stop16h 38m

Idaho Falls Fanning Field

Fri 2/27

8:00 am-9:55 pm

1 stop11h 55m

$402

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Mon 12/8

7:05 am-12:37 pm

1 stop7h 32m

Idaho Falls Fanning Field

Fri 12/12

1:17 pm-11:29 pm

1 stop8h 12m

$415

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Wed 2/18

11:24 am-11:07 pm

2 stops13h 43m

Idaho Falls Fanning Field

Fri 2/27

2:02 pm-10:51 pm

1 stop6h 49m

$420

BaltimoreIdaho Falls

BWI - IDA

BWIIDA

Baltimore/Washington

Mon 12/8

4:15 pm-9:12 pm

1 stop6h 57m

Idaho Falls Fanning Field

Fri 12/12

2:45 pm-11:00 pm

1 stop6h 15m

$421

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Tue 3/10

7:15 am-12:31 pm

1 stop7h 16m

Idaho Falls Fanning Field

Wed 3/11

6:00 am-11:56 pm

2 stops15h 56m

$439

BaltimoreIdaho Falls

BWI - IDA

BWIIDA

Baltimore/Washington

Mon 12/8

6:02 am-1:27 pm

1 stop9h 25m

Idaho Falls Fanning Field

Fri 12/12

7:00 am-10:08 pm

2 stops13h 08m

$478

BaltimoreIdaho Falls

BWI - IDA

BWIIDA

Baltimore/Washington

Wed 11/12

8:15 am-3:16 pm

1 stop9h 01m

Idaho Falls Fanning Field

Sun 11/16

10:50 am-7:21 pm

1 stop6h 31m

$506

BaltimoreIdaho Falls

BWI - IDA

BWIIDA

Baltimore/Washington

Fri 11/7

6:00 am-4:08 pm

1 stop12h 08m

Idaho Falls Fanning Field

Mon 11/10

7:56 pm-5:24 am

1 stop7h 28m

$557

BaltimoreIdaho Falls

BWI - IDA

BWIIDA

Baltimore/Washington

Fri 11/7

6:00 am-4:08 pm

1 stop12h 08m

Idaho Falls Fanning Field

Mon 11/10

7:56 pm-10:24 am

2 stops36h 28m

$570

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How to get the cheapest flight ticket from Washington, D.C. to Idaho Falls

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the typical price of a round-trip flight between Washington, D.C. and Idaho Falls?

What is the cheapest month to fly to Idaho Falls?

If you aren’t able to travel to Idaho Falls during the month of January, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $447.

What is the cheapest day to depart on your flight to Idaho Falls?

Our data shows that Saturday is the least expensive day to fly to Idaho Falls. Tickets to fly out on this day can be as low as $562. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Idaho Falls on Sunday is $870.

What is the cheapest time of day to depart on your flight to Idaho Falls?

Our most recent data shows that the best time of day to fly to Idaho Falls is in the morning. Flights from Washington, D.C. to Idaho Falls during this time can be as low as $716. Try not to purchase tickets in the afternoon because they tend to be around $758. Of course, these prices can vary depending on the time of year and what airport you fly to.

Can stopping save me money on Washington, D.C. to Idaho Falls flights?

You could potentially save up to 39% on your flight if you consider stops on a Washington, D.C. to Idaho Falls flight.

When to book flights from Washington, D.C. to Idaho Falls

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. to Idaho Falls according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Washington, D.C. to Idaho Falls (WAS to IDA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. to Idaho Falls

Direct flights	None

There are no direct flights from Washington, D.C. to Idaho Falls. There are no popular flight routes from Washington, D.C. to Idaho Falls.

Search flight deals

How far is Washington, D.C. to Idaho Falls Fanning Field by plane?
A flight from Washington, D.C. to Idaho Falls Fanning Field will travel around 1831.8 mi. Flights usually cover this in 6h 57m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Washington, D.C. to Idaho Falls Fanning Field Airport?
Prices for flights from Washington, D.C. to Idaho Falls Fanning Field Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Washington, D.C. to Idaho Falls Fanning Field Airport?
There are 3 operators available for flights from Washington, D.C. to Idaho Falls Fanning Field Airport as of October 2025.
How old do you have to be to fly from Washington, D.C. to Idaho Falls Fanning Field Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington, D.C. to Idaho Falls Fanning Field Airport.
What documentation or ID do you need to fly to Idaho Falls Fanning Field Airport?
The travel and health documents you'll need for your trip to Idaho Falls Fanning Field Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Idaho Falls Fanning Field Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Washington, D.C. to Idaho Falls?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Washington, D.C. to Idaho Falls is United Airlines (70% of total bookings). The next most popular airline is American Airlines (30%).

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

Compare and see reviews for airlines that fly from Washington, D.C. to Idaho Falls with momondo

Airline	Rating	Free Cancellation	Price
American Airlines	PriceFrom $334	Free Cancellation	Rating 7.2 11,035 reviews	Search American Airlines flights
Delta	PriceFrom $334	Free Cancellation	Rating 7.9 7,998 reviews	Search Delta flights
United Airlines	PriceFrom $408	Free Cancellation	Rating 7.4 8,998 reviews	Search United Airlines flights

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Why should I use momondo to find a flight deal from Washington, D.C. to Idaho Falls?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Washington, D.C. to Idaho Falls. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Washington, D.C. to Idaho Falls with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Idaho Falls from Washington, D.C. with this policy.

How can momondo help me find flights from Washington, D.C. to Idaho Falls?

momondo helps you find the best flight between Washington, D.C. and Idaho Falls by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Washington, D.C. to Idaho Falls right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Washington, D.C. to Idaho Falls flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Idaho Falls trip

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Cheap flights from Washington, D.C. to Idaho Falls from $161

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. to Idaho Falls departing on 1/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Big names and deals

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Filter for what you want

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Find the cheapest flights from Washington, D.C. to Idaho Falls

Cheap round-trip flights

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Alaska Airlines flights from Washington, D.C. to Idaho Falls

Our best Alaska Airlines deals on Washington, D.C. to Idaho Falls flight tickets

American Airlines flights from Washington, D.C. to Idaho Falls

Our best American Airlines deals on Washington, D.C. to Idaho Falls flight tickets

momondo Fare Finder

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

See travel insights to Idaho Falls from

How to get the cheapest flight ticket from Washington, D.C. to Idaho Falls

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Washington, D.C. and Idaho Falls?

What is the cheapest month to fly to Idaho Falls?

If you aren’t able to travel to Idaho Falls during the month of January, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $447.

What is the cheapest day to depart on your flight to Idaho Falls?

What is the cheapest time of day to depart on your flight to Idaho Falls?

Can stopping save me money on Washington, D.C. to Idaho Falls flights?

You could potentially save up to 39% on your flight if you consider stops on a Washington, D.C. to Idaho Falls flight.

What is the cheapest airline that flies from Washington, D.C. to Idaho Falls Fanning Field?

American Airlines, Delta, and Alaska Airlines are the most popular carriers operating from Washington, D.C. to Idaho Falls Fanning Field

What airlines fly to Idaho Falls?

How long does it take to fly to Idaho Falls?

If you’re flying from a popular airport in Washington, D.C., such as Washington, D.C. or Baltimore, and flying into Idaho Falls, then you can expect flight times to average 5h 25m and 6h 25m, respectively.

When to book flights from Washington, D.C. to Idaho Falls

Cheap Washington, D.C. to Idaho Falls (WAS to IDA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. to Idaho Falls

Direct flights

How far is Washington, D.C. to Idaho Falls Fanning Field by plane?

When did momondo last update prices for flights from Washington, D.C. to Idaho Falls Fanning Field Airport?

How many operators does momondo search for flights from Washington, D.C. to Idaho Falls Fanning Field Airport?

How old do you have to be to fly from Washington, D.C. to Idaho Falls Fanning Field Airport?

What documentation or ID do you need to fly to Idaho Falls Fanning Field Airport?

What is the most popular airline from Washington, D.C. to Idaho Falls?

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

Compare and see reviews for airlines that fly from Washington, D.C. to Idaho Falls with momondo

Traveling to a place near Idaho Falls?

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Idaho Falls?

Can I find flights from Washington, D.C. to Idaho Falls with flexible booking policies on momondo?

How can momondo help me find flights from Washington, D.C. to Idaho Falls?

I’m not ready to book a flight from Washington, D.C. to Idaho Falls right now. Can momondo alert me if prices change?

An easier way to manage your Idaho Falls trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing Idaho