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Cheap flights from Idaho to Washington, D.C. from $106

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 10/4. 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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Find the cheapest flights from Idaho to Washington, D.C.

Cheap round-trip flights

American Airlines Logo
1:38 pm - 1:00 amBOI-DCA
9h 22m1 stop
American Airlines Logo
6:30 am - 12:27 pmDCA-BOI
7h 57m1 stop
$211American Airlines
Find Deal
Sat, Sep 13 - Wed, Sep 17
Delta Logo
5:00 am - 3:25 pmGEG-DCA
7h 25m1 stop
Delta Logo
6:00 am - 11:22 amDCA-GEG
8h 22m1 stop
$211Delta
Find Deal
Sat, Sep 6 - Sat, Sep 13
Alaska Airlines Logo
7:07 am - 9:59 pmBOI-DCA
12h 52m1 stop
Alaska Airlines Logo
5:06 pm - 12:08 amDCA-BOI
9h 02m1 stop
$226Alaska Airlines
Find Deal
Thu, Sep 18 - Tue, Sep 23
Hawaiian Airlines Logo
7:00 am - 9:59 pmGEG-DCA
11h 59m1 stop
Hawaiian Airlines Logo
5:49 pm - 11:11 pmDCA-GEG
8h 22m1 stop
$228Hawaiian Airlines
Find Deal
Thu, Sep 4 - Tue, Sep 9
Alaska Airlines Logo
7:00 am - 9:59 pmGEG-DCA
11h 59m1 stop
Alaska Airlines Logo
5:49 pm - 11:11 pmDCA-GEG
8h 22m1 stop
$264Alaska Airlines
Find Deal
Thu, Aug 28 - Tue, Sep 9
Frontier Logo
12:22 pm - 9:59 pmBOI-DCA
7h 37m1 stop
Frontier Logo
1:00 pm - 11:37 amDCA-BOI
24h 37m1 stop
$265Frontier
Find Deal
Thu, Sep 18 - Wed, Sep 24
Hawaiian Airlines Logo
7:00 am - 8:29 pmGEG-DCA
10h 29m1 stop
Hawaiian Airlines Logo
8:00 am - 1:58 pmDCA-GEG
8h 58m1 stop
$267Hawaiian Airlines
Find Deal
Sat, Oct 25 - Wed, Nov 5
Frontier Logo
12:22 pm - 9:59 pmBOI-DCA
7h 37m1 stop
Frontier Logo
7:00 am - 11:37 amDCA-BOI
6h 37m1 stop
$272Frontier
Find Deal
Thu, Sep 11 - Sun, Sep 14
Southwest Logo
5:00 am - 2:20 pmBOI-DCA
7h 20m2 stops
Southwest Logo
4:45 pm - 12:45 amDCA-BOI
10h 00m1 stop
$278Southwest
Find Deal
Mon, Nov 10 - Fri, Nov 14
Southwest Logo
10:10 am - 11:25 pmGEG-DCA
10h 15m2 stops
Southwest Logo
3:35 pm - 12:20 amDCA-GEG
11h 45m2 stops
$289Southwest
Find Deal
Wed, Oct 22 - Mon, Oct 27

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
Sep 13
BOI1:38 pmBoise Air Term. Gowen Fld
9h 22m
1 stop
DCA1:00 amWashington, D.C. Reagan-National
Sep 17
DCA6:30 amWashington, D.C. Reagan-National
7h 57m
1 stop
BOI12:27 pmBoise Air Term. Gowen Fld
$211
Find similar
American Airlines
Sep 13
BOI1:57 pmBoise Air Term. Gowen Fld
9h 03m
2 stops
DCA1:00 amWashington, D.C. Reagan-National
Sep 17
DCA6:30 amWashington, D.C. Reagan-National
7h 57m
1 stop
BOI12:27 pmBoise Air Term. Gowen Fld
$216
Find similar
American Airlines
Sep 16
BOI1:38 pmBoise Air Term. Gowen Fld
9h 20m
1 stop
DCA12:58 amWashington, D.C. Reagan-National
Sep 19
DCA10:45 pmWashington, D.C. Reagan-National
15h 42m
1 stop
BOI12:27 pmBoise Air Term. Gowen Fld
$249
Find similar

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

Our best Hawaiian Airlines deals on Idaho to Washington, D.C. Reagan-National Airport flight tickets
Hawaiian Airlines
Sep 4
GEG7:00 amSpokane
11h 59m
1 stop
DCA9:59 pmWashington, D.C. Reagan-National
Sep 9
DCA5:49 pmWashington, D.C. Reagan-National
8h 22m
1 stop
GEG11:11 pmSpokane
$228
Find similar
Hawaiian Airlines
Oct 25
GEG7:00 amSpokane
10h 29m
1 stop
DCA8:29 pmWashington, D.C. Reagan-National
Nov 5
DCA8:00 amWashington, D.C. Reagan-National
8h 58m
1 stop
GEG1:58 pmSpokane
$267
Find similar
Hawaiian Airlines
Feb 3
GEG11:35 amSpokane
7h 20m
1 stop
DCA9:55 pmWashington, D.C. Reagan-National
Feb 8
DCA5:30 pmWashington, D.C. Reagan-National
9h 44m
1 stop
GEG12:14 amSpokane
$296
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 August 7, 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

Sat 9/13

1:38 pm-1:00 am

1 stop9h 22m

Washington, D.C. Reagan-National

Wed 9/17

6:30 am-12:27 pm

1 stop7h 57m

$211

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Sat 9/6

5:00 am-3:25 pm

1 stop7h 25m

Washington, D.C. Reagan-National

Sat 9/13

6:00 am-11:22 am

1 stop8h 22m

$211

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

Thu 9/18

7:07 am-9:59 pm

1 stop12h 52m

Washington, D.C. Reagan-National

Tue 9/23

5:06 pm-12:08 am

1 stop9h 02m

$226

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Thu 9/4

7:00 am-9:59 pm

1 stop11h 59m

Washington, D.C. Reagan-National

Tue 9/9

5:49 pm-11:11 pm

1 stop8h 22m

$228

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Thu 8/28

7:00 am-9:59 pm

1 stop11h 59m

Washington, D.C. Reagan-National

Tue 9/9

5:49 pm-11:11 pm

1 stop8h 22m

$264

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

Thu 9/18

12:22 pm-9:59 pm

1 stop7h 37m

Washington, D.C. Reagan-National

Wed 9/24

1:00 pm-11:37 am

1 stop24h 37m

$265

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Sat 10/25

7:00 am-8:29 pm

1 stop10h 29m

Washington, D.C. Reagan-National

Wed 11/5

8:00 am-1:58 pm

1 stop8h 58m

$267

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

Thu 9/11

12:22 pm-9:59 pm

1 stop7h 37m

Washington, D.C. Reagan-National

Sun 9/14

7:00 am-11:37 am

1 stop6h 37m

$272

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

Mon 11/10

5:00 am-2:20 pm

2 stops7h 20m

Washington, D.C. Reagan-National

Fri 11/14

4:45 pm-12:45 am

1 stop10h 00m

$278

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Wed 10/22

10:10 am-11:25 pm

2 stops10h 15m

Washington, D.C. Reagan-National

Mon 10/27

3:35 pm-12:20 am

2 stops11h 45m

$289

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 June is, on average, the cheapest month to fly to Washington, D.C. Reagan-National Airport from Idaho, with most prices found around $444. If you aren’t able to travel to Washington, D.C. Reagan-National Airport during the month of June, then flying in July is also cheap. Prices for this month can be found on momondo for an average of $446.

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 $505 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 $313 on momondo.

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

You could potentially save up to 66% 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

Best Price Found

$106

Fastest flight time

5h 59m

Direct flights

None
The best one-way flight to Washington, D.C. Reagan-National Airport from Idaho in the past 72 hours is $106. The best round-trip flight deal from Idaho to Washington, D.C. Reagan-National Airport found on momondo in the last 72 hours is $211.
The fastest flight from Idaho to Washington, D.C. Reagan-National Airport takes 5h 59m
There are no direct flights from Idaho to Washington, D.C. Reagan-National Airport. Popular non-direct routes for this connection are Spokane Airport - Washington, D.C. Reagan-National Airport, Jackson Hole Airport - Washington, D.C. Reagan-National Airport and Boise Air Term. Gowen Fld Airport - 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 $300Free CancellationRating
8.0
7,985 reviews
Search Delta flights
American AirlinesPriceFrom $300Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Alaska AirlinesPriceFrom $331Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom $349Free CancellationRating
7.4
8,917 reviews
Search United Airlines flights
SouthwestPriceFrom $403Free CancellationRating
8.0
4,247 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
Gettysburg
Arlington
National Harbor
Woodbridge
Laurel
Silver Spring
Tysons
Waldorf
Fredericksburg
Colonial Beach
Manassas
Rockville
Towson
Gaithersburg
Fairfax
Reston
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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