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Cheap flights from Washington, D.C. to Idaho Falls from $144

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 2/25. 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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0 bags

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

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
8:00 am - 3:40 pm
BWI
-
IDA
9h 40m
1 stop
United Airlines Logo
2:40 pm - 11:25 pm
IDA
-
BWI
6h 45m
1 stop
$309United Airlines
Tue, Feb 24 - Tue, Mar 3
Delta Logo
12:59 pm - 10:21 pm
DCA
-
IDA
11h 22m
2 stops
Delta Logo
5:25 am - 6:33 pm
IDA
-
DCA
11h 08m
2 stops
$329Delta
Tue, Feb 24 - Tue, Mar 3
United Airlines Logo
3:58 pm - 8:58 pm
IAD
-
IDA
7h 00m
1 stop
United Airlines Logo
2:40 pm - 11:19 pm
IDA
-
IAD
6h 39m
1 stop
$337United Airlines
Tue, Feb 24 - Tue, Mar 3
Delta Logo
5:10 pm - 10:21 pm
DCA
-
IDA
7h 11m
1 stop
Delta Logo
5:25 am - 6:33 pm
IDA
-
DCA
11h 08m
2 stops
$339Delta
Tue, Feb 24 - Tue, Mar 3
Delta Logo
12:59 pm - 10:21 pm
DCA
-
IDA
11h 22m
2 stops
Delta Logo
5:25 am - 6:33 pm
IDA
-
DCA
11h 08m
2 stops
$345Delta
Tue, Feb 24 - Tue, Mar 3
Alaska Airlines Logo
5:00 pm - 11:36 pm
DCA
-
IDA
8h 36m
1 stop
Alaska Airlines Logo
5:20 pm - 4:06 pm
IDA
-
DCA
20h 46m
1 stop
$354Alaska Airlines
Tue, Feb 24 - Tue, Mar 3
United Airlines Logo
5:15 pm - 10:53 pm
IAD
-
IDA
7h 38m
1 stop
United Airlines Logo
4:15 pm - 12:32 am
IDA
-
IAD
6h 17m
1 stop
$362United Airlines
Mon, Jun 29 - Sat, Jul 4
Alaska Airlines Logo
7:16 pm - 3:29 pm
BWI
-
IDA
22h 13m
1 stop
Alaska Airlines Logo
6:00 am - 6:16 pm
IDA
-
BWI
10h 16m
1 stop
$399Alaska Airlines
Fri, Apr 24 - Tue, Apr 28
American Airlines Logo
4:59 pm - 11:24 pm
DCA
-
IDA
8h 25m
1 stop
American Airlines Logo
6:18 am - 3:59 pm
IDA
-
DCA
7h 41m
1 stop
$429American Airlines
Tue, Feb 24 - Tue, Mar 3
American Airlines Logo
4:59 pm - 11:24 pm
DCA
-
IDA
8h 25m
1 stop
American Airlines Logo
6:18 am - 8:43 pm
IDA
-
DCA
12h 25m
2 stops
$434American Airlines
Tue, Feb 24 - Tue, Mar 3

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

Our best United Airlines deals on Washington, D.C. to Idaho Falls flight tickets
United Airlines
Feb 24
BWI8:00 amBaltimore/Washington
9h 40m
1 stop
IDA3:40 pmIdaho Falls Fanning Field
Mar 3
IDA2:40 pmIdaho Falls Fanning Field
6h 45m
1 stop
BWI11:25 pmBaltimore/Washington
$309
United Airlines
Feb 24
IAD3:58 pmWashington, D.C. Dulles Intl
7h 00m
1 stop
IDA8:58 pmIdaho Falls Fanning Field
Mar 3
IDA2:40 pmIdaho Falls Fanning Field
6h 39m
1 stop
IAD11:19 pmWashington, D.C. Dulles Intl
$337
United Airlines
Jun 29
IAD5:15 pmWashington, D.C. Dulles Intl
7h 38m
1 stop
IDA10:53 pmIdaho Falls Fanning Field
Jul 4
IDA4:15 pmIdaho Falls Fanning Field
6h 17m
1 stop
IAD12:32 amWashington, D.C. Dulles Intl
$362

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 24
DCA4:59 pmWashington, D.C. Reagan-National
8h 25m
1 stop
IDA11:24 pmIdaho Falls Fanning Field
Mar 3
IDA6:18 amIdaho Falls Fanning Field
7h 41m
1 stop
DCA3:59 pmWashington, D.C. Reagan-National
$429
American Airlines
Feb 24
DCA4:59 pmWashington, D.C. Reagan-National
8h 25m
1 stop
IDA11:24 pmIdaho Falls Fanning Field
Mar 3
IDA6:18 amIdaho Falls Fanning Field
12h 25m
2 stops
DCA8:43 pmWashington, D.C. Reagan-National
$434
American Airlines
Feb 24
DCA11:36 amWashington, D.C. Reagan-National
13h 48m
2 stops
IDA11:24 pmIdaho Falls Fanning Field
Mar 3
IDA6:18 amIdaho Falls Fanning Field
11h 26m
2 stops
DCA7:44 pmWashington, D.C. Reagan-National
$439

momondo 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, momondo users made 832,500 searches. Data last updated January 29, 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

BaltimoreIdaho Falls

BWI - IDA

BWIIDA

Baltimore/Washington

Tue 2/24

8:00 am-3:40 pm

1 stop9h 40m

Idaho Falls Fanning Field

Tue 3/3

2:40 pm-11:25 pm

1 stop6h 45m

$309

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Tue 2/24

12:59 pm-10:21 pm

2 stops11h 22m

Idaho Falls Fanning Field

Tue 3/3

5:25 am-6:33 pm

2 stops11h 08m

$329

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Tue 2/24

3:58 pm-8:58 pm

1 stop7h 00m

Idaho Falls Fanning Field

Tue 3/3

2:40 pm-11:19 pm

1 stop6h 39m

$337

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Tue 2/24

5:10 pm-10:21 pm

1 stop7h 11m

Idaho Falls Fanning Field

Tue 3/3

5:25 am-6:33 pm

2 stops11h 08m

$339

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Tue 2/24

12:59 pm-10:21 pm

2 stops11h 22m

Idaho Falls Fanning Field

Tue 3/3

5:25 am-6:33 pm

2 stops11h 08m

$345

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Tue 2/24

5:00 pm-11:36 pm

1 stop8h 36m

Idaho Falls Fanning Field

Tue 3/3

5:20 pm-4:06 pm

1 stop20h 46m

$354

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Mon 6/29

5:15 pm-10:53 pm

1 stop7h 38m

Idaho Falls Fanning Field

Sat 7/4

4:15 pm-12:32 am

1 stop6h 17m

$362

BaltimoreIdaho Falls

BWI - IDA

BWIIDA

Baltimore/Washington

Fri 4/24

7:16 pm-3:29 pm

1 stop22h 13m

Idaho Falls Fanning Field

Tue 4/28

6:00 am-6:16 pm

1 stop10h 16m

$399

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Tue 2/24

4:59 pm-11:24 pm

1 stop8h 25m

Idaho Falls Fanning Field

Tue 3/3

6:18 am-3:59 pm

1 stop7h 41m

$429

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Tue 2/24

4:59 pm-11:24 pm

1 stop8h 25m

Idaho Falls Fanning Field

Tue 3/3

6:18 am-8:43 pm

2 stops12h 25m

$434

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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

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

You could potentially save up to 32% on your flight if you consider stops on a Washington, D.C. to Idaho Falls flight.

How have Washington, D.C. to Idaho Falls flight prices changed over time?

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

Fastest flight time

7h 07m

Direct flights

None
The fastest flight from Washington, D.C. to Idaho Falls takes 7h 07m
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 7h 07m, 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?

  • 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?

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
DeltaPriceFrom $360Free CancellationRating
7.9
8,128 reviews
Search Delta flights
United AirlinesPriceFrom $388Free CancellationRating
7.4
9,215 reviews
Search United Airlines flights
American AirlinesPriceFrom $480Free CancellationRating
7.2
11,205 reviews
Search American Airlines flights

Traveling to a place near Idaho Falls?

Book flights to Idaho Falls if you plan to visit one of these locations
Rexburg

Why use momondo?

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.

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