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Cheap flights from Washington, D.C. to Idaho Falls from $174

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 9/17. 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

Discover deals from 900+ travel sites with momondo.

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

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
8:59 am - 7:30 pmIAD  Washington, D.C. Dulles Intl-IDA Idaho Falls Fanning Field
36h 31m2 stops Las Vegas Harry Reid Intl Phoenix Sky Harbor Intl
Multiple Airlines Logo
6:21 pm - 6:20 amIDA  Idaho Falls Fanning Field-IAD Washington, D.C. Dulles Intl
9h 59m1 stop Las Vegas Harry Reid Intl
$356Multiple Airlines
Sat, Sep 5 - Mon, Sep 14
Alaska Airlines Logo
7:50 am - 3:20 pmBWI  Baltimore/Washington-IDA Idaho Falls Fanning Field
9h 30m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
2:01 pm - 6:30 amIDA  Idaho Falls Fanning Field-BWI Baltimore/Washington
14h 29m1 stop Seattle/Tacoma Intl
$359Alaska Airlines
Tue, Sep 15 - Tue, Sep 22
United Airlines Logo
6:30 am - 1:29 pmIAD  Washington, D.C. Dulles Intl-IDA Idaho Falls Fanning Field
8h 59m1 stop Denver Intl
United Airlines Logo
4:04 pm - 12:32 amIDA  Idaho Falls Fanning Field-IAD Washington, D.C. Dulles Intl
6h 28m1 stop Denver Intl
$359United Airlines
Thu, Aug 27 - Mon, Aug 31
Delta Logo
7:00 am - 12:15 pmBWI  Baltimore/Washington-IDA Idaho Falls Fanning Field
7h 15m1 stop Salt Lake City
Delta Logo
6:45 pm - 6:00 amIDA  Idaho Falls Fanning Field-BWI Baltimore/Washington
9h 15m1 stop Salt Lake City
$359Delta
Fri, Dec 11 - Tue, Jan 5
Delta Logo
7:00 am - 12:15 pmBWI  Baltimore/Washington-IDA Idaho Falls Fanning Field
7h 15m1 stop Salt Lake City
Delta Logo
6:45 pm - 6:00 amIDA  Idaho Falls Fanning Field-BWI Baltimore/Washington
9h 15m1 stop Salt Lake City
$359Delta
Fri, Dec 11 - Tue, Jan 5
Alaska Airlines Logo
7:02 am - 3:20 pmIAD  Washington, D.C. Dulles Intl-IDA Idaho Falls Fanning Field
10h 18m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
1:58 pm - 11:59 pmIDA  Idaho Falls Fanning Field-IAD Washington, D.C. Dulles Intl
8h 01m1 stop Seattle/Tacoma Intl
$359Alaska Airlines
Sat, Oct 24 - Tue, Oct 27
Delta Logo
7:00 am - 12:22 pmBWI  Baltimore/Washington-IDA Idaho Falls Fanning Field
7h 22m1 stop Salt Lake City
Delta Logo
6:56 pm - 5:45 amIDA  Idaho Falls Fanning Field-BWI Baltimore/Washington
8h 49m1 stop Salt Lake City
$359Delta
Fri, Nov 6 - Sun, Nov 8
United Airlines Logo
10:00 am - 3:38 pmIAD  Washington, D.C. Dulles Intl-IDA Idaho Falls Fanning Field
7h 38m1 stop Denver Intl
United Airlines Logo
2:35 pm - 11:15 pmIDA  Idaho Falls Fanning Field-IAD Washington, D.C. Dulles Intl
6h 40m1 stop Denver Intl
$379United Airlines
Sun, Nov 8 - Thu, Nov 12
Alaska Airlines Logo
7:02 am - 3:20 pmIAD  Washington, D.C. Dulles Intl-IDA Idaho Falls Fanning Field
10h 18m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
1:58 pm - 11:59 pmIDA  Idaho Falls Fanning Field-IAD Washington, D.C. Dulles Intl
8h 01m1 stop Seattle/Tacoma Intl
$389Alaska Airlines
Sat, Oct 24 - Tue, Oct 27
United Airlines Logo
10:10 am - 3:23 pmIAD  Washington, D.C. Dulles Intl-IDA Idaho Falls Fanning Field
7h 13m1 stop Denver Intl
United Airlines Logo
7:00 am - 5:50 pmIDA  Idaho Falls Fanning Field-IAD Washington, D.C. Dulles Intl
8h 50m1 stop Denver Intl
$394United Airlines
Sat, Sep 5 - Wed, Sep 9

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Delta flights from Washington, D.C. to Idaho Falls

Our best Delta deals on Washington, D.C. to Idaho Falls flight tickets
Delta
Dec 11
BWI7:00 amBaltimore/Washington
7h 15m
1 stop
IDA12:15 pmIdaho Falls Fanning Field
Jan 5
IDA6:45 pmIdaho Falls Fanning Field
9h 15m
1 stop
BWI6:00 amBaltimore/Washington
$359
Delta
Dec 11
BWI7:00 amBaltimore/Washington
7h 15m
1 stop
IDA12:15 pmIdaho Falls Fanning Field
Jan 5
IDA6:45 pmIdaho Falls Fanning Field
12h 31m
2 stops
BWI9:16 amBaltimore/Washington
$364
Delta
Sep 15
BWI12:30 pmBaltimore/Washington
11h 52m
2 stops
IDA10:22 pmIdaho Falls Fanning Field
Sep 22
IDA6:57 pmIdaho Falls Fanning Field
9h 21m
1 stop
BWI6:18 amBaltimore/Washington
$386

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 27
DCA7:35 amWashington, D.C. Reagan-National
7h 34m
1 stop
IDA1:09 pmIdaho Falls Fanning Field
Aug 31
IDA1:43 pmIdaho Falls Fanning Field
8h 16m
1 stop
DCA11:59 pmWashington, D.C. Reagan-National
$359
American Airlines
Aug 28
DCA7:35 amWashington, D.C. Reagan-National
7h 34m
1 stop
IDA1:09 pmIdaho Falls Fanning Field
Aug 31
IDA2:20 pmIdaho Falls Fanning Field
7h 38m
1 stop
DCA11:58 pmWashington, D.C. Reagan-National
$369
American Airlines
Oct 13
BWI7:17 amBaltimore/Washington
8h 03m
1 stop
IDA1:20 pmIdaho Falls Fanning Field
Oct 22
IDA1:50 pmIdaho Falls Fanning Field
8h 34m
1 stop
BWI12:24 amBaltimore/Washington
$396

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 10, 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

IAD Washington, D.C. Dulles Intl - IDA Idaho Falls Fanning Field

IADIDA

Washington, D.C. Dulles Intl

Sat 9/5

8:59 am-7:30 pm

2 stops36h 31m

Idaho Falls Fanning Field

Mon 9/14

6:21 pm-6:20 am

1 stop9h 59m

$356

BaltimoreIdaho Falls

BWI Baltimore/Washington - IDA Idaho Falls Fanning Field

BWIIDA

Baltimore/Washington

Tue 9/15

7:50 am-3:20 pm

1 stop9h 30m

Idaho Falls Fanning Field

Tue 9/22

2:01 pm-6:30 am

1 stop14h 29m

$359

Washington, D.C.Idaho Falls

IAD Washington, D.C. Dulles Intl - IDA Idaho Falls Fanning Field

IADIDA

Washington, D.C. Dulles Intl

Thu 8/27

6:30 am-1:29 pm

1 stop8h 59m

Idaho Falls Fanning Field

Mon 8/31

4:04 pm-12:32 am

1 stop6h 28m

$359

BaltimoreIdaho Falls

BWI Baltimore/Washington - IDA Idaho Falls Fanning Field

BWIIDA

Baltimore/Washington

Fri 12/11

7:00 am-12:15 pm

1 stop7h 15m

Idaho Falls Fanning Field

Tue 1/5

6:45 pm-6:00 am

1 stop9h 15m

$359

BaltimoreIdaho Falls

BWI Baltimore/Washington - IDA Idaho Falls Fanning Field

BWIIDA

Baltimore/Washington

Fri 12/11

7:00 am-12:15 pm

1 stop7h 15m

Idaho Falls Fanning Field

Tue 1/5

6:45 pm-6:00 am

1 stop9h 15m

$359

Washington, D.C.Idaho Falls

IAD Washington, D.C. Dulles Intl - IDA Idaho Falls Fanning Field

IADIDA

Washington, D.C. Dulles Intl

Sat 10/24

7:02 am-3:20 pm

1 stop10h 18m

Idaho Falls Fanning Field

Tue 10/27

1:58 pm-11:59 pm

1 stop8h 01m

$359

BaltimoreIdaho Falls

BWI Baltimore/Washington - IDA Idaho Falls Fanning Field

BWIIDA

Baltimore/Washington

Fri 11/6

7:00 am-12:22 pm

1 stop7h 22m

Idaho Falls Fanning Field

Sun 11/8

6:56 pm-5:45 am

1 stop8h 49m

$359
Quickest round-trip

Washington, D.C.Idaho Falls

IAD Washington, D.C. Dulles Intl - IDA Idaho Falls Fanning Field

IADIDA

Washington, D.C. Dulles Intl

Sun 11/8

10:00 am-3:38 pm

1 stop7h 38m

Idaho Falls Fanning Field

Thu 11/12

2:35 pm-11:15 pm

1 stop6h 40m

$379

Washington, D.C.Idaho Falls

IAD Washington, D.C. Dulles Intl - IDA Idaho Falls Fanning Field

IADIDA

Washington, D.C. Dulles Intl

Sat 10/24

7:02 am-3:20 pm

1 stop10h 18m

Idaho Falls Fanning Field

Tue 10/27

1:58 pm-11:59 pm

1 stop8h 01m

$389

Washington, D.C.Idaho Falls

IAD Washington, D.C. Dulles Intl - IDA Idaho Falls Fanning Field

IADIDA

Washington, D.C. Dulles Intl

Sat 9/5

10:10 am-3:23 pm

1 stop7h 13m

Idaho Falls Fanning Field

Wed 9/9

7:00 am-5:50 pm

1 stop8h 50m

$394

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

What is the cheapest month to fly to Idaho Falls?

If you aren’t able to travel to Idaho Falls during the month of December, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $0.

What is the cheapest Washington, D.C. to Idaho Falls Fanning Field flight route?

Fly from Washington, D.C. Dulles Intl to Idaho Falls Fanning Field for the best Washington, D.C. - Idaho Falls Fanning Field flight prices

What cabin class options are available on Washington, D.C. to Idaho Falls flights?

There is only 1 cabin class available to choose from on Washington, D.C. to Idaho Falls flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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

You could potentially save up to 2% 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 23m

Direct flights

None
The fastest flight from Washington, D.C. to Idaho Falls takes 6h 23m
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

Frequently asked questions about flying from Washington, D.C. to Idaho Falls

  • 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 23m, 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 plane model from Washington, D.C. to Idaho Falls?

  • 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 $274Free CancellationRating
7.4
10,100 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $433Free CancellationRating
7.9
12,794 reviews
Search Alaska 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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