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Cheap flights from Idaho to Washington, D.C. from $65

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 to Washington, D.C. departing on 1/15. 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 Idaho to Washington, D.C.

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
12:44 pm - 4:59 pmBOI-DCA
26h 15m1 stop
Frontier Logo
6:00 pm - 11:49 amDCA-BOI
19h 49m1 stop
$131Frontier
Find Deal
Thu, Dec 4 - Wed, Dec 10
Frontier Logo
12:54 pm - 9:59 pmBOI-DCA
7h 05m1 stop
Frontier Logo
6:00 pm - 11:59 amDCA-BOI
19h 59m1 stop
$180Frontier
Find Deal
Thu, Jan 22 - Sat, Jan 24
Frontier Logo
12:54 pm - 1:06 pmBOI-DCA
22h 12m1 stop
Frontier Logo
6:00 pm - 11:59 amDCA-BOI
19h 59m1 stop
$184Frontier
Find Deal
Fri, Jan 9 - Sun, Jan 11
Multiple Airlines Logo
12:28 pm - 9:59 pmGEG-DCA
6h 31m1 stop
Multiple Airlines Logo
5:09 pm - 10:52 pmDCA-GEG
8h 43m1 stop
$223Multiple Airlines
Find Deal
Thu, Jan 15 - Sun, Jan 18
Multiple Airlines Logo
9:13 pm - 4:59 pmGEG-DCA
16h 46m2 stops
Multiple Airlines Logo
6:00 pm - 11:13 amDCA-GEG
20h 13m1 stop
$234Multiple Airlines
Find Deal
Thu, Dec 11 - Sat, Dec 13
Alaska Airlines Logo
5:51 am - 4:08 pmGEG-DCA
7h 17m1 stop
Alaska Airlines Logo
5:00 pm - 11:14 pmDCA-GEG
9h 14m1 stop
$266Alaska Airlines
Find Deal
Sat, Dec 6 - Mon, Dec 8
Delta Logo
5:05 am - 3:27 pmGEG-DCA
7h 22m1 stop
Delta Logo
4:55 pm - 12:11 amDCA-GEG
10h 16m1 stop
$267Delta
Find Deal
Wed, Dec 3 - Wed, Dec 10
Delta Logo
1:10 pm - 11:04 amGEG-DCA
18h 54m2 stops
Delta Logo
4:55 pm - 10:49 pmDCA-GEG
8h 54m1 stop
$272Delta
Find Deal
Sat, Dec 6 - Mon, Dec 8
Alaska Airlines Logo
10:47 am - 9:59 pmBOI-DCA
9h 12m1 stop
Alaska Airlines Logo
5:01 pm - 11:59 pmDCA-BOI
8h 58m1 stop
$287Alaska Airlines
Find Deal
Thu, Dec 25 - Fri, Jan 9
Hawaiian Airlines Logo
7:00 am - 9:02 pmGEG-DCA
11h 02m1 stop
Hawaiian Airlines Logo
8:00 am - 2:36 pmDCA-GEG
9h 36m1 stop
$316Hawaiian Airlines
Find Deal
Tue, Mar 3 - Wed, Mar 4

Frontier flights from Idaho to Washington, D.C. Reagan-National Airport

Our best Frontier deals on Idaho to Washington, D.C. Reagan-National Airport flight tickets
Frontier
Dec 4
BOI12:44 pmBoise Air Term. Gowen Fld
26h 15m
1 stop
DCA4:59 pmWashington, D.C. Reagan-National
Dec 10
DCA6:00 pmWashington, D.C. Reagan-National
19h 49m
1 stop
BOI11:49 amBoise Air Term. Gowen Fld
$131
Find similar
Frontier
Jan 22
BOI12:54 pmBoise Air Term. Gowen Fld
7h 05m
1 stop
DCA9:59 pmWashington, D.C. Reagan-National
Jan 24
DCA6:00 pmWashington, D.C. Reagan-National
19h 59m
1 stop
BOI11:59 amBoise Air Term. Gowen Fld
$180
Find similar
Frontier
Jan 9
BOI12:54 pmBoise Air Term. Gowen Fld
22h 12m
1 stop
DCA1:06 pmWashington, D.C. Reagan-National
Jan 11
DCA6:00 pmWashington, D.C. Reagan-National
19h 59m
1 stop
BOI11:59 amBoise Air Term. Gowen Fld
$184
Find similar

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

Our best Alaska Airlines deals on Idaho to Washington, D.C. Reagan-National Airport flight tickets
Alaska Airlines
Dec 6
GEG5:51 amSpokane
7h 17m
1 stop
DCA4:08 pmWashington, D.C. Reagan-National
Dec 8
DCA5:00 pmWashington, D.C. Reagan-National
9h 14m
1 stop
GEG11:14 pmSpokane
$266
Find similar
Alaska Airlines
Dec 25
BOI10:47 amBoise Air Term. Gowen Fld
9h 12m
1 stop
DCA9:59 pmWashington, D.C. Reagan-National
Jan 9
DCA5:01 pmWashington, D.C. Reagan-National
8h 58m
1 stop
BOI11:59 pmBoise Air Term. Gowen Fld
$287
Find similar
Alaska Airlines
Dec 9
GEG10:00 amSpokane
8h 59m
1 stop
DCA9:59 pmWashington, D.C. Reagan-National
Dec 10
DCA8:59 amWashington, D.C. Reagan-National
15h 29m
2 stops
GEG9:28 pmSpokane
$326
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Idaho 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 10, 2025.
Use the filters below to find and compare flights from Idaho to Washington, D.C. Reagan-National Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

Thu 12/4

12:44 pm-4:59 pm

1 stop26h 15m

Washington, D.C. Reagan-National

Wed 12/10

6:00 pm-11:49 am

1 stop19h 49m

$131

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

Thu 1/22

12:54 pm-9:59 pm

1 stop7h 05m

Washington, D.C. Reagan-National

Sat 1/24

6:00 pm-11:59 am

1 stop19h 59m

$180

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

Fri 1/9

12:54 pm-1:06 pm

1 stop22h 12m

Washington, D.C. Reagan-National

Sun 1/11

6:00 pm-11:59 am

1 stop19h 59m

$184

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Thu 1/15

12:28 pm-9:59 pm

1 stop6h 31m

Washington, D.C. Reagan-National

Sun 1/18

5:09 pm-10:52 pm

1 stop8h 43m

$223

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Thu 12/11

9:13 pm-4:59 pm

2 stops16h 46m

Washington, D.C. Reagan-National

Sat 12/13

6:00 pm-11:13 am

1 stop20h 13m

$234

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Sat 12/6

5:51 am-4:08 pm

1 stop7h 17m

Washington, D.C. Reagan-National

Mon 12/8

5:00 pm-11:14 pm

1 stop9h 14m

$266

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Wed 12/3

5:05 am-3:27 pm

1 stop7h 22m

Washington, D.C. Reagan-National

Wed 12/10

4:55 pm-12:11 am

1 stop10h 16m

$267

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Sat 12/6

1:10 pm-11:04 am

2 stops18h 54m

Washington, D.C. Reagan-National

Mon 12/8

4:55 pm-10:49 pm

1 stop8h 54m

$272

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

Thu 12/25

10:47 am-9:59 pm

1 stop9h 12m

Washington, D.C. Reagan-National

Fri 1/9

5:01 pm-11:59 pm

1 stop8h 58m

$287

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Tue 3/3

7:00 am-9:02 pm

1 stop11h 02m

Washington, D.C. Reagan-National

Wed 3/4

8:00 am-2:36 pm

1 stop9h 36m

$316

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 Idaho 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 month to fly to Washington, D.C. Reagan-National Airport?

The month of November is, on average, the cheapest month to fly to Washington, D.C. Reagan-National Airport from Idaho, with most prices found around $410. If you aren’t able to travel to Washington, D.C. Reagan-National Airport during the month of November, then flying in July is also cheap. Prices for this month can be found on momondo for an average of $427.

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

The cheapest day to depart from Idaho to Washington, D.C. Reagan-National Airport is on a Saturday. Travelers who choose to depart for Washington, D.C. Reagan-National Airport on a Saturday will often find tickets for as low as $532. Flights from Idaho to Washington, D.C. Reagan-National Airport on a Sunday will generally be more expensive and average around $699. 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 to Washington, D.C. Reagan-National Airport flights are usually those with departure times in the evening. Our users have found flights to Washington, D.C. Reagan-National Airport in the evening for as low as $453. 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 $634.

How far in advance should I book a flight to Washington, D.C. Reagan-National Airport?

You are more likely to see cheaper flights to Washington, D.C. Reagan-National Airport from Idaho when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. Reagan-National Airport for around $532 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. Reagan-National Airport from Idaho for as low as $224 on momondo.

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

You could potentially save up to 53% on your flight if you consider stops on a Idaho to Washington, D.C. Reagan-National Airport flight.

Cheap Idaho to Washington, D.C. Reagan-National Airport flight deals and tips

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

Direct flights

None
There are no direct flights from Idaho to Washington, D.C. Reagan-National Airport. There are no popular flight routes from Idaho to Washington, D.C. Reagan-National Airport.
Search flight deals

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

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

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Idaho to Washington, D.C. Reagan-National Airport.

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

    The travel and health documents you'll need for your trip to Washington, D.C. Reagan-National 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 Washington, D.C. Reagan-National Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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

Compare and see reviews for airlines that fly from Idaho to Washington, D.C. Reagan-National Airport with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $249Free CancellationRating
7.9
8,007 reviews
Search Delta flights
Alaska AirlinesPriceFrom $300Free CancellationRating
8.0
11,268 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $300Free CancellationRating
7.2
11,045 reviews
Search American Airlines flights
United AirlinesPriceFrom $349Free CancellationRating
7.4
9,012 reviews
Search United Airlines flights
SouthwestPriceFrom $403Free CancellationRating
8.0
4,235 reviews
Search Southwest 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
Reston
Manassas
Gaithersburg
Fairfax
Glen Burnie
Linthicum Heights
Springfield

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Washington, D.C. from Idaho.

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

Yes. All flights to Washington, D.C. from Idaho on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once all potential Idaho to Washington, D.C. flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Of course. momondo tracks the price of Idaho to Washington, D.C. flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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