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Cheap flights from Idaho Falls to Washington, D.C. from $251

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Idaho Falls to Washington, D.C. departing on 11/18. 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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Cheap round-trip flights

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Alaska Airlines Logo
8:00 am - 9:55 pmIDA-DCA
11h 55m1 stop
Alaska Airlines Logo
8:00 am - 10:38 pmDCA-IDA
16h 38m1 stop
$472Alaska Airlines
Find Deal
Tue, Mar 10 - Wed, Mar 11
Alaska Airlines Logo
8:00 am - 9:55 pmIDA-DCA
11h 55m1 stop
Alaska Airlines Logo
9:30 am - 10:38 pmDCA-IDA
15h 08m2 stops
$478Alaska Airlines
Find Deal
Tue, Mar 10 - Wed, Mar 11
Alaska Airlines Logo
8:00 am - 9:55 pmIDA-DCA
11h 55m1 stop
Alaska Airlines Logo
8:00 am - 10:38 pmDCA-IDA
16h 38m1 stop
$482Alaska Airlines
Find Deal
Tue, Mar 10 - Wed, Mar 11
American Airlines Logo
1:43 pm - 12:40 amIDA-DCA
8h 57m1 stop
American Airlines Logo
9:28 am - 9:57 pmDCA-IDA
14h 29m2 stops
$542American Airlines
Find Deal
Tue, Mar 10 - Wed, Mar 11
Delta Logo
6:57 pm - 9:10 amIDA-DCA
12h 13m2 stops
Delta Logo
10:20 am - 10:19 pmDCA-IDA
13h 59m2 stops
$561Delta
Find Deal
Sun, Nov 16 - Thu, Nov 20
Alaska Airlines Logo
4:00 pm - 7:00 amIDA-DCA
13h 00m2 stops
Alaska Airlines Logo
9:21 am - 10:38 pmDCA-IDA
15h 17m2 stops
$574Alaska Airlines
Find Deal
Tue, Mar 10 - Wed, Mar 11
Delta Logo
6:00 am - 10:56 pmIDA-DCA
14h 56m2 stops
Delta Logo
10:00 am - 6:15 pmDCA-IDA
10h 15m2 stops
$654Delta
Find Deal
Tue, Mar 10 - Wed, Mar 11
United Airlines Logo
7:00 am - 10:42 pmIDA-DCA
13h 42m2 stops
United Airlines Logo
4:17 pm - 10:59 pmDCA-IDA
8h 42m1 stop
$777United Airlines
Find Deal
Wed, Dec 3 - Sat, Jan 3
American Airlines Logo
7:00 am - 9:10 pmIDA-DCA
12h 10m2 stops
American Airlines Logo
6:30 am - 12:46 pmDCA-IDA
8h 16m1 stop
$1,091American Airlines
Find Deal
Sun, Dec 21 - Fri, Dec 26
United Airlines Logo
6:40 am - 2:59 pmIDA-DCA
6h 19m1 stop
United Airlines Logo
4:17 pm - 10:59 pmDCA-IDA
8h 42m1 stop
$1,676United Airlines
Find Deal
Sun, Dec 21 - Fri, Dec 26

Alaska Airlines flights from Idaho Falls to Washington, D.C. Reagan-National Airport

Our best Alaska Airlines deals on Idaho Falls to Washington, D.C. Reagan-National Airport flight tickets
Alaska Airlines
Mar 10
IDA8:00 amIdaho Falls Fanning Field
11h 55m
1 stop
DCA9:55 pmWashington, D.C. Reagan-National
Mar 11
DCA8:00 amWashington, D.C. Reagan-National
16h 38m
1 stop
IDA10:38 pmIdaho Falls Fanning Field
$472
Find similar
Alaska Airlines
Mar 10
IDA8:00 amIdaho Falls Fanning Field
11h 55m
1 stop
DCA9:55 pmWashington, D.C. Reagan-National
Mar 11
DCA9:30 amWashington, D.C. Reagan-National
15h 08m
2 stops
IDA10:38 pmIdaho Falls Fanning Field
$478
Find similar
Alaska Airlines
Mar 10
IDA8:00 amIdaho Falls Fanning Field
11h 55m
1 stop
DCA9:55 pmWashington, D.C. Reagan-National
Mar 11
DCA8:00 amWashington, D.C. Reagan-National
16h 38m
1 stop
IDA10:38 pmIdaho Falls Fanning Field
$482
Find similar

American Airlines flights from Idaho Falls to Washington, D.C. Reagan-National Airport

Our best American Airlines deals on Idaho Falls to Washington, D.C. Reagan-National Airport flight tickets
American Airlines
Mar 10
IDA1:43 pmIdaho Falls Fanning Field
8h 57m
1 stop
DCA12:40 amWashington, D.C. Reagan-National
Mar 11
DCA9:28 amWashington, D.C. Reagan-National
14h 29m
2 stops
IDA9:57 pmIdaho Falls Fanning Field
$542
Find similar
American Airlines
Dec 21
IDA7:00 amIdaho Falls Fanning Field
12h 10m
2 stops
DCA9:10 pmWashington, D.C. Reagan-National
Dec 26
DCA6:30 amWashington, D.C. Reagan-National
8h 16m
1 stop
IDA12:46 pmIdaho Falls Fanning Field
$1,091
Find similar
American Airlines
Dec 21
IDA7:00 amIdaho Falls Fanning Field
10h 50m
2 stops
DCA7:50 pmWashington, D.C. Reagan-National
Dec 26
DCA1:07 pmWashington, D.C. Reagan-National
11h 14m
2 stops
IDA10:21 pmIdaho Falls Fanning Field
$1,096
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Idaho Falls to Washington, D.C. Reagan-National Airport 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 November 3, 2025.
Use the filters below to find and compare flights from Idaho Falls to Washington, D.C. Reagan-National Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Idaho FallsWashington, D.C.

IDA - DCA

IDADCA

Idaho Falls Fanning Field

Tue 3/10

8:00 am-9:55 pm

1 stop11h 55m

Washington, D.C. Reagan-National

Wed 3/11

8:00 am-10:38 pm

1 stop16h 38m

$472

Idaho FallsWashington, D.C.

IDA - DCA

IDADCA

Idaho Falls Fanning Field

Tue 3/10

8:00 am-9:55 pm

1 stop11h 55m

Washington, D.C. Reagan-National

Wed 3/11

9:30 am-10:38 pm

2 stops15h 08m

$478

Idaho FallsWashington, D.C.

IDA - DCA

IDADCA

Idaho Falls Fanning Field

Tue 3/10

8:00 am-9:55 pm

1 stop11h 55m

Washington, D.C. Reagan-National

Wed 3/11

8:00 am-10:38 pm

1 stop16h 38m

$482

Idaho FallsWashington, D.C.

IDA - DCA

IDADCA

Idaho Falls Fanning Field

Tue 3/10

1:43 pm-12:40 am

1 stop8h 57m

Washington, D.C. Reagan-National

Wed 3/11

9:28 am-9:57 pm

2 stops14h 29m

$542

Idaho FallsWashington, D.C.

IDA - DCA

IDADCA

Idaho Falls Fanning Field

Sun 11/16

6:57 pm-9:10 am

2 stops12h 13m

Washington, D.C. Reagan-National

Thu 11/20

10:20 am-10:19 pm

2 stops13h 59m

$561

Idaho FallsWashington, D.C.

IDA - DCA

IDADCA

Idaho Falls Fanning Field

Tue 3/10

4:00 pm-7:00 am

2 stops13h 00m

Washington, D.C. Reagan-National

Wed 3/11

9:21 am-10:38 pm

2 stops15h 17m

$574

Idaho FallsWashington, D.C.

IDA - DCA

IDADCA

Idaho Falls Fanning Field

Tue 3/10

6:00 am-10:56 pm

2 stops14h 56m

Washington, D.C. Reagan-National

Wed 3/11

10:00 am-6:15 pm

2 stops10h 15m

$654

Idaho FallsWashington, D.C.

IDA - DCA

IDADCA

Idaho Falls Fanning Field

Wed 12/3

7:00 am-10:42 pm

2 stops13h 42m

Washington, D.C. Reagan-National

Sat 1/3

4:17 pm-10:59 pm

1 stop8h 42m

$777

Idaho FallsWashington, D.C.

IDA - DCA

IDADCA

Idaho Falls Fanning Field

Sun 12/21

7:00 am-9:10 pm

2 stops12h 10m

Washington, D.C. Reagan-National

Fri 12/26

6:30 am-12:46 pm

1 stop8h 16m

$1,091

Idaho FallsWashington, D.C.

IDA - DCA

IDADCA

Idaho Falls Fanning Field

Sun 12/21

6:40 am-2:59 pm

1 stop6h 19m

Washington, D.C. Reagan-National

Fri 12/26

4:17 pm-10:59 pm

1 stop8h 42m

$1,676

Flights are sorted by cheapest round-trip flights first.

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See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from Idaho Falls to Washington, D.C. Reagan-National Airport

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 day to depart on your flight to Washington, D.C. Reagan-National Airport?

The cheapest day to depart from Idaho Falls to Washington, D.C. Reagan-National Airport is on a Monday. Travelers who choose to depart for Washington, D.C. Reagan-National Airport on a Monday will often find tickets for as low as $394. Flights from Idaho Falls to Washington, D.C. Reagan-National Airport on a Friday will generally be more expensive and average around $877. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Washington, D.C. Reagan-National Airport?

Our data shows that the cheapest Idaho Falls to Washington, D.C. Reagan-National Airport flights are usually those with departure times at noon. Our users have found flights to Washington, D.C. Reagan-National Airport at noon for as low as $554. In contrast, the most expensive time of day to depart to Washington, D.C. Reagan-National Airport is in the morning when prices are around $877.

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

You could potentially save up to 1% on your flight if you consider stops on a Idaho Falls to Washington, D.C. Reagan-National Airport flight.

When to book flights from Idaho Falls to Washington, D.C. Reagan-National Airport

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

Cheap Idaho Falls to Washington, D.C. Reagan-National Airport (IDA to DCA) flight deals and tips

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

Direct flights

None
There are no direct flights from Idaho Falls to Washington, D.C. Reagan-National Airport. There are no popular flight routes from Idaho Falls to Washington, D.C. Reagan-National Airport.
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  • How far is Idaho Falls Fanning Field to Washington, D.C. Reagan-National by plane?

    A flight from Idaho Falls Fanning Field to Washington, D.C. Reagan-National will travel around 1833.0 mi. By plane, this route typically takes 6h 19m.

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

    Prices for flights from Idaho Falls Fanning Field Airport to Washington, D.C. Reagan-National Airport are updated daily.

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Idaho Falls Fanning Field Airport to Washington, D.C. Reagan-National Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Reagan-National Airport?

    The required travel and health documents for your Washington, D.C. Reagan-National Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington, D.C. Reagan-National Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Idaho Falls to Washington, D.C. Reagan-National Airport?

Best airlines flying from Idaho Falls to Washington, D.C. Reagan-National Airport

Compare and see reviews for airlines that fly from Idaho Falls to Washington, D.C. Reagan-National Airport with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $394Free CancellationRating
7.4
8,997 reviews
Search United Airlines flights
American AirlinesPriceFrom $437Free CancellationRating
7.2
11,038 reviews
Search American Airlines flights

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
National Harbor
Gettysburg
Arlington
Woodbridge
Waldorf
Tysons
Laurel
Colonial Beach
Silver Spring
Fredericksburg
Towson
Rockville
Manassas
Reston
Gaithersburg
Fairfax
Glen Burnie
Springfield
Linthicum Heights

Why use momondo?

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

Finding the right flight to Washington, D.C. from Idaho Falls is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Washington, D.C. quick and easy, saving you time and money.

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

All flight searches from Idaho Falls to Washington, D.C. on momondo can be filtered to show those which offer flexible booking policies.

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

momondo provides multiple filters to help you find the best flight to Washington, D.C. from Idaho Falls. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes momondo offers price alerts on flights to Washington, D.C. from Idaho Falls. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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