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Cheap flights from Washington, D.C. to Idaho Falls from $198

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 9/29. 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
0 bags

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

Cheap round-trip flights

Logo
5:45 am - 4:05 pmBWI-IDA
12h 20m2 stops
Logo
9:39 pm - 7:00 amIDA-BWI
31h 21m3 stops
$303
Find Deal
Fri, Sep 19 - Mon, Sep 22
Logo
5:45 am - 4:05 pmBWI-IDA
12h 20m2 stops
Logo
9:39 pm - 10:33 pmIDA-BWI
22h 54m2 stops
$312
Find Deal
Fri, Sep 19 - Mon, Sep 22
Alaska Airlines Logo
7:00 am - 3:20 pmIAD-IDA
10h 20m1 stop
Alaska Airlines Logo
3:57 pm - 7:33 amIDA-IAD
13h 36m1 stop
$394Alaska Airlines
Find Deal
Sat, Sep 20 - Wed, Sep 24
United Airlines Logo
3:59 pm - 10:52 pmIAD-IDA
8h 53m1 stop
United Airlines Logo
7:00 am - 3:01 pmIDA-IAD
6h 01m1 stop
$395United Airlines
Find Deal
Wed, Nov 26 - Wed, Dec 3
Delta Logo
5:21 pm - 10:25 pmDCA-IDA
7h 04m1 stop
Delta Logo
6:00 am - 4:11 pmIDA-DCA
8h 11m1 stop
$395Delta
Find Deal
Tue, Sep 23 - Tue, Sep 30
American Airlines Logo
6:11 am - 12:41 pmIAD-IDA
8h 30m1 stop
American Airlines Logo
1:11 pm - 11:50 pmIDA-IAD
8h 39m2 stops
$400American Airlines
Find Deal
Thu, Oct 16 - Mon, Oct 20
Delta Logo
3:40 pm - 10:25 pmDCA-IDA
8h 45m2 stops
Delta Logo
6:00 am - 4:11 pmIDA-DCA
8h 11m1 stop
$400Delta
Find Deal
Sat, Sep 20 - Tue, Sep 30
Alaska Airlines Logo
7:00 am - 3:20 pmBWI-IDA
10h 20m1 stop
Alaska Airlines Logo
3:57 pm - 5:39 amIDA-BWI
11h 42m1 stop
$403Alaska Airlines
Find Deal
Fri, Sep 19 - Mon, Sep 22
American Airlines Logo
6:25 am - 12:59 pmIAD-IDA
8h 34m1 stop
American Airlines Logo
1:35 pm - 8:46 amIDA-IAD
17h 11m2 stops
$429American Airlines
Find Deal
Sat, Sep 20 - Wed, Sep 24
United Airlines Logo
4:20 pm - 8:59 pmBWI-IDA
6h 39m1 stop
United Airlines Logo
2:35 pm - 11:17 pmIDA-BWI
6h 42m1 stop
$486United Airlines
Find Deal
Sat, Aug 16 - Wed, Aug 20

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
Oct 16
IAD6:11 amWashington, D.C. Dulles Intl
8h 30m
1 stop
IDA12:41 pmIdaho Falls Fanning Field
Oct 20
IDA1:11 pmIdaho Falls Fanning Field
8h 39m
2 stops
IAD11:50 pmWashington, D.C. Dulles Intl
$400
Find similar
American Airlines
Sep 20
IAD6:25 amWashington, D.C. Dulles Intl
8h 34m
1 stop
IDA12:59 pmIdaho Falls Fanning Field
Sep 24
IDA1:35 pmIdaho Falls Fanning Field
17h 11m
2 stops
IAD8:46 amWashington, D.C. Dulles Intl
$429
Find similar
American Airlines
Oct 16
IAD8:25 pmWashington, D.C. Dulles Intl
18h 16m
2 stops
IDA12:41 pmIdaho Falls Fanning Field
Oct 20
IDA1:11 pmIdaho Falls Fanning Field
8h 39m
2 stops
IAD11:50 pmWashington, D.C. Dulles Intl
$434
Find similar

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
Nov 26
IAD3:59 pmWashington, D.C. Dulles Intl
8h 53m
1 stop
IDA10:52 pmIdaho Falls Fanning Field
Dec 3
IDA7:00 amIdaho Falls Fanning Field
6h 01m
1 stop
IAD3:01 pmWashington, D.C. Dulles Intl
$395
Find similar
United Airlines
Aug 16
BWI4:20 pmBaltimore/Washington
6h 39m
1 stop
IDA8:59 pmIdaho Falls Fanning Field
Aug 20
IDA2:35 pmIdaho Falls Fanning Field
6h 42m
1 stop
BWI11:17 pmBaltimore/Washington
$486
Find similar
United Airlines
Sep 21
BWI10:10 amBaltimore/Washington
9h 05m
1 stop
IDA5:15 pmIdaho Falls Fanning Field
Sep 30
IDA10:50 amIdaho Falls Fanning Field
8h 32m
2 stops
BWI9:22 pmBaltimore/Washington
$501
Find similar

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 August 1, 2025.
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

Fri 9/19

5:45 am-4:05 pm

2 stops12h 20m

Idaho Falls Fanning Field

Mon 9/22

9:39 pm-7:00 am

3 stops31h 21m

$303

BaltimoreIdaho Falls

BWI - IDA

BWIIDA

Baltimore/Washington

Fri 9/19

5:45 am-4:05 pm

2 stops12h 20m

Idaho Falls Fanning Field

Mon 9/22

9:39 pm-10:33 pm

2 stops22h 54m

$312

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Sat 9/20

7:00 am-3:20 pm

1 stop10h 20m

Idaho Falls Fanning Field

Wed 9/24

3:57 pm-7:33 am

1 stop13h 36m

$394

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Wed 11/26

3:59 pm-10:52 pm

1 stop8h 53m

Idaho Falls Fanning Field

Wed 12/3

7:00 am-3:01 pm

1 stop6h 01m

$395

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Tue 9/23

5:21 pm-10:25 pm

1 stop7h 04m

Idaho Falls Fanning Field

Tue 9/30

6:00 am-4:11 pm

1 stop8h 11m

$395

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Thu 10/16

6:11 am-12:41 pm

1 stop8h 30m

Idaho Falls Fanning Field

Mon 10/20

1:11 pm-11:50 pm

2 stops8h 39m

$400

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Sat 9/20

3:40 pm-10:25 pm

2 stops8h 45m

Idaho Falls Fanning Field

Tue 9/30

6:00 am-4:11 pm

1 stop8h 11m

$400

BaltimoreIdaho Falls

BWI - IDA

BWIIDA

Baltimore/Washington

Fri 9/19

7:00 am-3:20 pm

1 stop10h 20m

Idaho Falls Fanning Field

Mon 9/22

3:57 pm-5:39 am

1 stop11h 42m

$403

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Sat 9/20

6:25 am-12:59 pm

1 stop8h 34m

Idaho Falls Fanning Field

Wed 9/24

1:35 pm-8:46 am

2 stops17h 11m

$429

BaltimoreIdaho Falls

BWI - IDA

BWIIDA

Baltimore/Washington

Sat 8/16

4:20 pm-8:59 pm

1 stop6h 39m

Idaho Falls Fanning Field

Wed 8/20

2:35 pm-11:17 pm

1 stop6h 42m

$486

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 February is also cheap. Prices for this month can be found on momondo for an average of $494.

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 55% 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

Best Price Found

$198

Fastest flight time

6h 34m

Direct flights

None

Airports in Idaho Falls

1 airport
The best one-way flight to Idaho Falls from Washington, D.C. in the past 72 hours is $198. The best round-trip flight deal from Washington, D.C. to Idaho Falls found on momondo in the last 72 hours is $303.
The fastest flight from Washington, D.C. to Idaho Falls takes 6h 34m
There are no direct flights from Washington, D.C. to Idaho Falls. Popular non-direct routes for this connection are Washington, D.C. Reagan-National Airport - Idaho Falls Fanning Field Airport, Washington, D.C. Dulles Intl Airport - Idaho Falls Fanning Field Airport and Baltimore/Washington Airport - Idaho Falls Fanning Field Airport.
There is 1 airport near Idaho Falls: Idaho Falls Fanning Field (IDA)
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  • 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 34m, 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
American AirlinesPriceFrom $334Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $334Free CancellationRating
8.0
7,983 reviews
Search Delta flights
United AirlinesPriceFrom $408Free CancellationRating
7.4
8,904 reviews
Search United 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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