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Cheap flights from Idaho to Washington, D.C. from $91

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 2/5. 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 Idaho to Washington, D.C.

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
12:36 pm - 9:59 pm
BOI
-
DCA
7h 23m1 stop
Frontier Logo
8:00 am - 11:51 am
DCA
-
BOI
29h 51m1 stop
$155Frontier
Thu, Feb 19 - Wed, Feb 25
Frontier Logo
11:22 am - 9:59 pm
GEG
-
DCA
7h 37m1 stop
Frontier Logo
2:00 pm - 11:08 am
DCA
-
GEG
24h 08m1 stop
$166Frontier
Thu, Jan 15 - Wed, Jan 21
Multiple Airlines Logo
9:53 am - 1:00 pm
GEG
-
DCA
24h 07m2 stops
Multiple Airlines Logo
2:00 pm - 11:27 am
DCA
-
GEG
24h 27m1 stop
$250Multiple Airlines
Fri, Feb 27 - Wed, Mar 4
Multiple Airlines Logo
12:03 pm - 9:59 pm
GEG
-
DCA
6h 56m1 stop
Multiple Airlines Logo
8:59 am - 9:25 pm
DCA
-
GEG
15h 26m2 stops
$281Multiple Airlines
Thu, Jan 29 - Thu, Feb 5
Delta Logo
5:40 am - 3:20 pm
BOI
-
DCA
7h 40m1 stop
Delta Logo
4:44 pm - 11:59 pm
DCA
-
BOI
9h 15m1 stop
$287Delta
Thu, Jan 22 - Thu, Jan 29
Delta Logo
5:00 am - 3:20 pm
GEG
-
DCA
7h 20m1 stop
Delta Logo
4:44 pm - 10:42 pm
DCA
-
GEG
8h 58m1 stop
$287Delta
Fri, Feb 27 - Sat, Mar 7
Alaska Airlines Logo
8:29 pm - 4:06 pm
GEG
-
DCA
16h 37m1 stop
Alaska Airlines Logo
5:00 pm - 11:59 pm
DCA
-
GEG
9h 59m1 stop
$311Alaska Airlines
Tue, Feb 24 - Sat, Feb 28
Alaska Airlines Logo
8:10 am - 9:59 pm
GEG
-
DCA
10h 49m1 stop
Alaska Airlines Logo
8:00 am - 6:12 pm
DCA
-
GEG
13h 12m1 stop
$312Alaska Airlines
Sat, Feb 28 - Tue, Mar 3
United Airlines Logo
12:43 pm - 11:59 pm
SUN
-
DCA
9h 16m1 stop
United Airlines Logo
4:11 pm - 9:29 pm
DCA
-
SUN
7h 18m1 stop
$379United Airlines
Fri, Jan 30 - Tue, Feb 3
United Airlines Logo
12:30 pm - 10:48 pm
JAC
-
DCA
8h 18m1 stop
United Airlines Logo
6:00 am - 12:58 pm
DCA
-
JAC
8h 58m1 stop
$422United Airlines
Fri, Jan 30 - Tue, Feb 3

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

Our best American Airlines deals on Idaho to Washington, D.C. Reagan-National Airport flight tickets
American Airlines
Jan 16
GEG6:33 amSpokane
10h 42m
1 stop
DCA8:15 pmWashington, D.C. Reagan-National
Jan 24
DCA5:55 amWashington, D.C. Reagan-National
11h 14m
2 stops
GEG2:09 pmSpokane
$357
Find similar
American Airlines
Feb 4
GEG6:00 amSpokane
7h 38m
1 stop
DCA4:38 pmWashington, D.C. Reagan-National
Feb 8
DCA9:35 amWashington, D.C. Reagan-National
12h 14m
2 stops
GEG6:49 pmSpokane
$362
Find similar
American Airlines
Apr 15
IDA1:45 pmIdaho Falls Fanning Field
7h 14m
1 stop
DCA10:59 pmWashington, D.C. Reagan-National
Apr 21
DCA6:30 amWashington, D.C. Reagan-National
7h 57m
1 stop
IDA12:27 pmIdaho Falls Fanning Field
$392
Find similar

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

Our best Delta deals on Idaho to Washington, D.C. Reagan-National Airport flight tickets
Delta
Feb 27
GEG5:00 amSpokane
7h 20m
1 stop
DCA3:20 pmWashington, D.C. Reagan-National
Mar 7
DCA4:44 pmWashington, D.C. Reagan-National
8h 58m
1 stop
GEG10:42 pmSpokane
$287
Find similar
Delta
Mar 4
BOI8:50 amBoise Air Term. Gowen Fld
12h 38m
2 stops
DCA11:28 pmWashington, D.C. Reagan-National
Mar 8
DCA4:40 pmWashington, D.C. Reagan-National
9h 13m
1 stop
BOI11:53 pmBoise Air Term. Gowen Fld
$292
Find similar
Delta
Jan 24
BOI9:15 amBoise Air Term. Gowen Fld
11h 42m
2 stops
DCA10:57 pmWashington, D.C. Reagan-National
Jan 31
DCA9:54 amWashington, D.C. Reagan-National
12h 18m
2 stops
BOI8:12 pmBoise Air Term. Gowen Fld
$298
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 December 27, 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 2/19

12:36 pm-9:59 pm

1 stop7h 23m

Washington, D.C. Reagan-National

Wed 2/25

8:00 am-11:51 am

1 stop29h 51m

$155

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Thu 1/15

11:22 am-9:59 pm

1 stop7h 37m

Washington, D.C. Reagan-National

Wed 1/21

2:00 pm-11:08 am

1 stop24h 08m

$166

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Fri 2/27

9:53 am-1:00 pm

2 stops24h 07m

Washington, D.C. Reagan-National

Wed 3/4

2:00 pm-11:27 am

1 stop24h 27m

$250

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Thu 1/29

12:03 pm-9:59 pm

1 stop6h 56m

Washington, D.C. Reagan-National

Thu 2/5

8:59 am-9:25 pm

2 stops15h 26m

$281

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

Thu 1/22

5:40 am-3:20 pm

1 stop7h 40m

Washington, D.C. Reagan-National

Thu 1/29

4:44 pm-11:59 pm

1 stop9h 15m

$287

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Fri 2/27

5:00 am-3:20 pm

1 stop7h 20m

Washington, D.C. Reagan-National

Sat 3/7

4:44 pm-10:42 pm

1 stop8h 58m

$287

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Tue 2/24

8:29 pm-4:06 pm

1 stop16h 37m

Washington, D.C. Reagan-National

Sat 2/28

5:00 pm-11:59 pm

1 stop9h 59m

$311

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Sat 2/28

8:10 am-9:59 pm

1 stop10h 49m

Washington, D.C. Reagan-National

Tue 3/3

8:00 am-6:12 pm

1 stop13h 12m

$312

HaileyWashington, D.C.

SUN - DCA

SUNDCA

Hailey Sun Valley-Friedman

Fri 1/30

12:43 pm-11:59 pm

1 stop9h 16m

Washington, D.C. Reagan-National

Tue 2/3

4:11 pm-9:29 pm

1 stop7h 18m

$379

JacksonWashington, D.C.

JAC - DCA

JACDCA

Jackson Hole

Fri 1/30

12:30 pm-10:48 pm

1 stop8h 18m

Washington, D.C. Reagan-National

Tue 2/3

6:00 am-12:58 pm

1 stop8h 58m

$422

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 Washington, D.C. from

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.

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 $531 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 38% 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

Fastest flight time

6h 27m

Direct flights

None
The fastest flight from Idaho to Washington, D.C. Reagan-National Airport takes 6h 27m
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.
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  • 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
8,018 reviews
Search Delta flights
American AirlinesPriceFrom $298Free CancellationRating
7.2
11,068 reviews
Search American Airlines flights
Alaska AirlinesPriceFrom $300Free CancellationRating
8.0
11,544 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom $349Free CancellationRating
7.4
9,116 reviews
Search United Airlines flights
SouthwestPriceFrom $403Free CancellationRating
8.0
4,258 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
Waldorf
Woodbridge
Tysons
Laurel
Colonial Beach
Silver Spring
Fredericksburg
Towson
Rockville
Gaithersburg
Reston
Manassas
Fairfax
Glen Burnie
Linthicum Heights
Bethesda

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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