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Cheap flights from Washington, D.C. to Idaho Falls from $185

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 4/14. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 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.
American Airlines Logo
7:30 am - 1:44 pm
DCA
-
IDA
8h 14m
1 stop
American Airlines Logo
12:12 pm - 11:58 pm
IDA
-
DCA
9h 46m
1 stop
$349American Airlines
Tue, Aug 11 - Tue, Aug 25
American Airlines Logo
6:24 am - 1:44 pm
IAD
-
IDA
9h 20m
1 stop
American Airlines Logo
12:12 pm - 10:47 pm
IDA
-
IAD
8h 35m
1 stop
$349American Airlines
Tue, Aug 11 - Tue, Aug 25
American Airlines Logo
5:15 pm - 11:39 pm
DCA
-
IDA
8h 24m
1 stop
American Airlines Logo
7:48 am - 8:00 pm
IDA
-
DCA
10h 12m
2 stops
$354American Airlines
Tue, Apr 14 - Sat, Apr 18
American Airlines Logo
1:44 pm - 11:39 pm
DCA
-
IDA
11h 55m
2 stops
American Airlines Logo
7:48 am - 10:56 pm
IDA
-
DCA
13h 08m
2 stops
$359American Airlines
Tue, Apr 14 - Sat, Apr 18
Delta Logo
5:00 pm - 10:14 pm
DCA
-
IDA
7h 14m
1 stop
Delta Logo
6:50 pm - 9:13 am
IDA
-
DCA
12h 23m
2 stops
$364Delta
Tue, Aug 11 - Tue, Aug 25
Alaska Airlines Logo
7:20 pm - 3:29 pm
IAD
-
IDA
22h 09m
1 stop
Alaska Airlines Logo
6:00 am - 6:20 pm
IDA
-
IAD
10h 20m
1 stop
$369Alaska Airlines
Mon, May 4 - Wed, May 6
Delta Logo
5:00 pm - 10:14 pm
DCA
-
IDA
7h 14m
1 stop
Delta Logo
6:50 pm - 9:13 am
IDA
-
DCA
12h 23m
2 stops
$374Delta
Tue, Aug 11 - Tue, Aug 25
United Airlines Logo
6:30 am - 1:25 pm
IAD
-
IDA
8h 55m
1 stop
United Airlines Logo
4:10 pm - 12:45 am
IDA
-
IAD
6h 35m
1 stop
$387United Airlines
Fri, May 29 - Mon, Jun 1
Delta Logo
5:00 pm - 10:14 pm
DCA
-
IDA
7h 14m
1 stop
Delta Logo
6:50 pm - 9:13 am
IDA
-
DCA
12h 23m
2 stops
$389Delta
Tue, Aug 11 - Tue, Aug 25
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
$419Alaska Airlines
Mon, May 4 - Wed, May 6

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
May 4
IAD7:20 pmWashington, D.C. Dulles Intl
22h 09m
1 stop
IDA3:29 pmIdaho Falls Fanning Field
May 6
IDA6:00 amIdaho Falls Fanning Field
10h 20m
1 stop
IAD6:20 pmWashington, D.C. Dulles Intl
$369
Alaska Airlines
May 4
BWI7:16 pmBaltimore/Washington
22h 13m
1 stop
IDA3:29 pmIdaho Falls Fanning Field
May 6
IDA6:00 amIdaho Falls Fanning Field
10h 16m
1 stop
BWI6:16 pmBaltimore/Washington
$419
Alaska Airlines
May 14
IAD6:00 amWashington, D.C. Dulles Intl
11h 26m
1 stop
IDA3:26 pmIdaho Falls Fanning Field
May 19
IDA1:54 pmIdaho Falls Fanning Field
8h 05m
1 stop
IAD11:59 pmWashington, D.C. Dulles Intl
$424

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
Aug 11
IAD6:24 amWashington, D.C. Dulles Intl
9h 20m
1 stop
IDA1:44 pmIdaho Falls Fanning Field
Aug 25
IDA12:12 pmIdaho Falls Fanning Field
8h 35m
1 stop
IAD10:47 pmWashington, D.C. Dulles Intl
$349
American Airlines
Apr 14
DCA5:15 pmWashington, D.C. Reagan-National
8h 24m
1 stop
IDA11:39 pmIdaho Falls Fanning Field
Apr 18
IDA7:48 amIdaho Falls Fanning Field
10h 12m
2 stops
DCA8:00 pmWashington, D.C. Reagan-National
$354
American Airlines
Apr 14
DCA1:44 pmWashington, D.C. Reagan-National
11h 55m
2 stops
IDA11:39 pmIdaho Falls Fanning Field
Apr 18
IDA7:48 amIdaho Falls Fanning Field
13h 08m
2 stops
DCA10:56 pmWashington, D.C. Reagan-National
$359

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 March 24, 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

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Tue 8/11

7:30 am-1:44 pm

1 stop8h 14m

Idaho Falls Fanning Field

Tue 8/25

12:12 pm-11:58 pm

1 stop9h 46m

$349

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Tue 8/11

6:24 am-1:44 pm

1 stop9h 20m

Idaho Falls Fanning Field

Tue 8/25

12:12 pm-10:47 pm

1 stop8h 35m

$349

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Tue 4/14

5:15 pm-11:39 pm

1 stop8h 24m

Idaho Falls Fanning Field

Sat 4/18

7:48 am-8:00 pm

2 stops10h 12m

$354

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Tue 4/14

1:44 pm-11:39 pm

2 stops11h 55m

Idaho Falls Fanning Field

Sat 4/18

7:48 am-10:56 pm

2 stops13h 08m

$359

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Tue 8/11

5:00 pm-10:14 pm

1 stop7h 14m

Idaho Falls Fanning Field

Tue 8/25

6:50 pm-9:13 am

2 stops12h 23m

$364

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Mon 5/4

7:20 pm-3:29 pm

1 stop22h 09m

Idaho Falls Fanning Field

Wed 5/6

6:00 am-6:20 pm

1 stop10h 20m

$369

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Tue 8/11

5:00 pm-10:14 pm

1 stop7h 14m

Idaho Falls Fanning Field

Tue 8/25

6:50 pm-9:13 am

2 stops12h 23m

$374
Quickest round-trip

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Fri 5/29

6:30 am-1:25 pm

1 stop8h 55m

Idaho Falls Fanning Field

Mon 6/1

4:10 pm-12:45 am

1 stop6h 35m

$387

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Tue 8/11

5:00 pm-10:14 pm

1 stop7h 14m

Idaho Falls Fanning Field

Tue 8/25

6:50 pm-9:13 am

2 stops12h 23m

$389

BaltimoreIdaho Falls

BWI - IDA

BWIIDA

Baltimore/Washington

Mon 5/4

7:16 pm-3:29 pm

1 stop22h 13m

Idaho Falls Fanning Field

Wed 5/6

6:00 am-6:16 pm

1 stop10h 16m

$419

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 56% 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

Fastest flight time

6h 44m

Direct flights

None
The fastest flight from Washington, D.C. to Idaho Falls takes 6h 44m
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 44m, 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
United AirlinesPriceFrom $333Free CancellationRating
7.4
9,467 reviews
Search United Airlines flights
DeltaPriceFrom $360Free CancellationRating
7.9
8,320 reviews
Search Delta flights
American AirlinesPriceFrom $480Free CancellationRating
7.1
11,492 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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