What is the cheapest airline that flies from Idaho to Washington, D.C. Reagan-National?

Delta, American Airlines, and Southwest are the most popular carriers operating from Idaho to Washington, D.C. Reagan-National

What airlines fly to Washington, D.C. Reagan-National Airport?

Delta, American Airlines and United Airlines are the top three most popular airlines that fly to Washington, D.C. Reagan-National Airport from Idaho according to our data. Delta is the first choice among our users, with 43% of people opting to fly with this airline when traveling to Washington, D.C. Reagan-National Airport. Keep in mind that there are 5 different airlines that fly to Washington, D.C. Reagan-National Airport on a routine basis, so you have a few additional options to choose from.

How long does it take to fly to Washington, D.C. Reagan-National Airport?

Flight times from Idaho to Washington, D.C. Reagan-National Airport vary, but if you’re flying out of Boise and flying into Washington, D.C. Dulles Intl Airport (one of the most popular routes), then the duration is 6h 33m on average. Another popular route from Idaho to Washington, D.C. Reagan-National Airport is flying from Idaho Falls to Washington, D.C. Dulles Intl Airport, which will take roughly 6h 40m. Keep in mind that layovers or delays could extend your travel time.

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

There are 5 operators available for flights from Idaho to Washington, D.C. Reagan-National Airport as of August 2026.

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.

$152 Cheap Flights from Idaho to Washington, D.C. Reagan-National Airport in 2026

Discover deals from 900+ travel sites with momondo.

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

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One-way

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Cheap round-trip flights

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3:21 pm - 11:59 pmBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National

6h 38m1 stop Chicago O'Hare Intl

8:40 am - 2:31 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld

7h 51m1 stop Chicago O'Hare Intl

$303American Airlines

Tue, Sep 22 - Tue, Sep 29

3:24 pm - 11:59 pmBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National

6h 35m1 stop Chicago O'Hare Intl

7:45 am - 2:33 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld

8h 48m1 stop Chicago O'Hare Intl

$303American Airlines

Tue, Oct 13 - Sat, Oct 17

12:31 pm - 9:11 pmBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National

6h 40m1 stop Chicago O'Hare Intl

6:25 am - 11:31 amDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld

7h 06m1 stop Chicago O'Hare Intl

$303United Airlines

Wed, Oct 28 - Thu, Oct 29

6:25 am - 3:04 pmBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National

6h 39m1 stop Denver Intl

5:10 pm - 10:51 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld

7h 41m1 stop Chicago O'Hare Intl

$303United Airlines

Sat, Oct 24 - Sat, Oct 31

2:50 pm - 11:59 pmBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National

7h 09m1 stop Minneapolis St Paul

4:45 pm - 10:34 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld

7h 49m1 stop Seattle/Tacoma Intl

$303Delta

Sat, Sep 19 - Tue, Sep 22

2:50 pm - 11:59 pmBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National

7h 09m1 stop Minneapolis St Paul

8:00 am - 1:01 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld

7h 01m1 stop Atlanta Hartsfield-Jackson

$303Delta

Sat, Sep 26 - Sat, Oct 3

1:24 pm - 12:11 pmBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National

20h 47m1 stop Denver Intl

5:27 pm - 11:55 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld

8h 28m1 stop Portland

$339Multiple Airlines

Tue, Sep 8 - Fri, Sep 11

6:35 am - 4:45 pmBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National

8h 10m1 stop Las Vegas Harry Reid Intl

6:00 am - 3:10 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld

11h 10m2 stops Kansas City Denver Intl

$362Southwest

Wed, Oct 28 - Thu, Oct 29

11:20 am - 10:55 pmBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National

9h 35m2 stops Phoenix Sky Harbor Intl Dallas Love Field

3:00 pm - 11:00 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld

10h 00m2 stops Chicago Midway Denver Intl

$363Southwest

Mon, Oct 19 - Thu, Oct 22

1:24 pm - 12:11 pmBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National

20h 47m1 stop Denver Intl

5:27 pm - 11:55 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld

8h 28m1 stop Portland

$374Multiple Airlines

Tue, Sep 8 - Thu, Sep 10

Cheap last minute flights

Enter your travel dates to find the best prices.

5:12 am - 4:00 pmGEG Spokane-DCA Washington, D.C. Reagan-National

7h 48m1 stop Portland

5:20 pm - 11:11 pmDCA Washington, D.C. Reagan-National-GEG Spokane

8h 51m1 stop Portland

$374Alaska Airlines

Thu, Sep 3 - Mon, Sep 7

5:15 am - 3:21 pmGEG Spokane-DCA Washington, D.C. Reagan-National

7h 06m1 stop Seattle/Tacoma Intl

4:35 pm - 11:59 pmDCA Washington, D.C. Reagan-National-GEG Spokane

10h 24m1 stop Seattle/Tacoma Intl

$385Delta

Tue, Sep 1 - Wed, Sep 2

5:12 am - 4:00 pmGEG Spokane-DCA Washington, D.C. Reagan-National

7h 48m1 stop Portland

5:00 pm - 11:59 pmDCA Washington, D.C. Reagan-National-GEG Spokane

9h 59m1 stop Seattle/Tacoma Intl

$395Alaska Airlines

Tue, Sep 1 - Tue, Sep 1

1:59 pm - 10:44 pmBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National

6h 45m1 stop Atlanta Hartsfield-Jackson

4:35 pm - 11:53 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld

9h 18m1 stop Seattle/Tacoma Intl

$401Delta

Wed, Sep 2 - Fri, Sep 4

12:24 pm - 9:59 pmBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National

7h 35m1 stop Denver Intl

5:00 pm - 11:44 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld

8h 44m1 stop Seattle/Tacoma Intl

$422Multiple Airlines

Thu, Sep 3 - Sun, Sep 6

12:24 pm - 4:59 pmBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National

26h 35m1 stop Denver Intl

7:00 am - 12:29 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld

7h 29m1 stop Denver Intl

$460Frontier

Sun, Aug 30 - Tue, Sep 1

7:00 am - 7:10 pmGEG Spokane-DCA Washington, D.C. Reagan-National

9h 10m2 stops Denver Intl Chicago Midway

1:00 pm - 10:05 pmDCA Washington, D.C. Reagan-National-GEG Spokane

12h 05m2 stops Chicago Midway Las Vegas Harry Reid Intl

$489Southwest

Tue, Sep 1 - Wed, Sep 2

5:00 am - 3:03 pmGEG Spokane-DCA Washington, D.C. Reagan-National

7h 03m1 stop Denver Intl

1:04 pm - 10:36 pmDCA Washington, D.C. Reagan-National-GEG Spokane

12h 32m2 stops Chicago O'Hare Intl San Francisco

$500United Airlines

Tue, Sep 1 - Wed, Sep 2

6:00 am - 5:00 pmBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National

9h 00m1 stop Las Vegas Harry Reid Intl

3:30 pm - 10:40 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld

9h 10m2 stops Lambert-St Louis Denver Intl

$534Southwest

Wed, Sep 2 - Fri, Sep 4

11:11 am - 9:09 pmGEG Spokane-DCA Washington, D.C. Reagan-National

6h 58m1 stop Chicago O'Hare Intl

6:30 am - 11:39 amDCA Washington, D.C. Reagan-National-GEG Spokane

8h 09m1 stop Chicago O'Hare Intl

$547United Airlines

Thu, Sep 3 - Mon, Sep 7

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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

Sep 5

BOI1:59 pmBoise Air Term. Gowen Fld

7h 49m

1 stop

DCA11:48 pmWashington, D.C. Reagan-National

Sep 9

DCA5:59 pmWashington, D.C. Reagan-National

7h 59m

1 stop

BOI11:58 pmBoise Air Term. Gowen Fld

$303

Delta

Oct 26

BOI11:10 pmBoise Air Term. Gowen Fld

8h 00m

1 stop

DCA9:10 amWashington, D.C. Reagan-National

Nov 1

DCA6:00 amWashington, D.C. Reagan-National

9h 34m

1 stop

BOI1:34 pmBoise Air Term. Gowen Fld

$327

Delta

Sep 10

BOI2:50 pmBoise Air Term. Gowen Fld

7h 09m

1 stop

DCA11:59 pmWashington, D.C. Reagan-National

Sep 14

DCA4:45 pmWashington, D.C. Reagan-National

9h 13m

1 stop

BOI11:58 pmBoise Air Term. Gowen Fld

$333

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

Oct 20

BOI3:24 pmBoise Air Term. Gowen Fld

6h 35m

1 stop

DCA11:59 pmWashington, D.C. Reagan-National

Oct 22

DCA5:00 amWashington, D.C. Reagan-National

8h 24m

1 stop

BOI11:24 amBoise Air Term. Gowen Fld

$312

American Airlines

Sep 23

BOI3:21 pmBoise Air Term. Gowen Fld

6h 38m

1 stop

DCA11:59 pmWashington, D.C. Reagan-National

Sep 30

DCA8:40 amWashington, D.C. Reagan-National

7h 51m

1 stop

BOI2:31 pmBoise Air Term. Gowen Fld

$317

American Airlines

Oct 3

GEG2:19 pmSpokane

6h 40m

1 stop

DCA11:59 pmWashington, D.C. Reagan-National

Oct 6

DCA5:00 amWashington, D.C. Reagan-National

9h 59m

1 stop

GEG11:59 amSpokane

$337

momondo Fare Finder

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

Cheapest round-trip

BoiseWashington, D.C.

BOI Boise Air Term. Gowen Fld - DCA Washington, D.C. Reagan-National

BOIDCA

Boise Air Term. Gowen Fld

Tue 9/22

3:21 pm-11:59 pm

1 stop6h 38m

Washington, D.C. Reagan-National

Tue 9/29

8:40 am-2:31 pm

1 stop7h 51m

$303

BoiseWashington, D.C.

BOI Boise Air Term. Gowen Fld - DCA Washington, D.C. Reagan-National

BOIDCA

Boise Air Term. Gowen Fld

Tue 10/13

3:24 pm-11:59 pm

1 stop6h 35m

Washington, D.C. Reagan-National

Sat 10/17

7:45 am-2:33 pm

1 stop8h 48m

$303

Quickest round-trip

BoiseWashington, D.C.

BOI Boise Air Term. Gowen Fld - DCA Washington, D.C. Reagan-National

BOIDCA

Boise Air Term. Gowen Fld

Wed 10/28

12:31 pm-9:11 pm

1 stop6h 40m

Washington, D.C. Reagan-National

Thu 10/29

6:25 am-11:31 am

1 stop7h 06m

$303

BoiseWashington, D.C.

BOI Boise Air Term. Gowen Fld - DCA Washington, D.C. Reagan-National

BOIDCA

Boise Air Term. Gowen Fld

Sat 10/24

6:25 am-3:04 pm

1 stop6h 39m

Washington, D.C. Reagan-National

Sat 10/31

5:10 pm-10:51 pm

1 stop7h 41m

$303

BoiseWashington, D.C.

BOI Boise Air Term. Gowen Fld - DCA Washington, D.C. Reagan-National

BOIDCA

Boise Air Term. Gowen Fld

Sat 9/19

2:50 pm-11:59 pm

1 stop7h 09m

Washington, D.C. Reagan-National

Tue 9/22

4:45 pm-10:34 pm

1 stop7h 49m

$303

BoiseWashington, D.C.

BOI Boise Air Term. Gowen Fld - DCA Washington, D.C. Reagan-National

BOIDCA

Boise Air Term. Gowen Fld

Sat 9/26

2:50 pm-11:59 pm

1 stop7h 09m

Washington, D.C. Reagan-National

Sat 10/3

8:00 am-1:01 pm

1 stop7h 01m

$303

BoiseWashington, D.C.

BOI Boise Air Term. Gowen Fld - DCA Washington, D.C. Reagan-National

BOIDCA

Boise Air Term. Gowen Fld

Tue 9/8

1:24 pm-12:11 pm

1 stop20h 47m

Washington, D.C. Reagan-National

Fri 9/11

5:27 pm-11:55 pm

1 stop8h 28m

$339

BoiseWashington, D.C.

BOI Boise Air Term. Gowen Fld - DCA Washington, D.C. Reagan-National

BOIDCA

Boise Air Term. Gowen Fld

Wed 10/28

6:35 am-4:45 pm

1 stop8h 10m

Washington, D.C. Reagan-National

Thu 10/29

6:00 am-3:10 pm

2 stops11h 10m

$362

BoiseWashington, D.C.

BOI Boise Air Term. Gowen Fld - DCA Washington, D.C. Reagan-National

BOIDCA

Boise Air Term. Gowen Fld

Mon 10/19

11:20 am-10:55 pm

2 stops9h 35m

Washington, D.C. Reagan-National

Thu 10/22

3:00 pm-11:00 pm

2 stops10h 00m

$363

BoiseWashington, D.C.

BOI Boise Air Term. Gowen Fld - DCA Washington, D.C. Reagan-National

BOIDCA

Boise Air Term. Gowen Fld

Tue 9/8

1:24 pm-12:11 pm

1 stop20h 47m

Washington, D.C. Reagan-National

Thu 9/10

5:27 pm-11:55 pm

1 stop8h 28m

$374

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Other information

What is the cheapest month to fly to Washington, D.C. Reagan-National Airport?

The month of August is, on average, the cheapest month to fly to Washington, D.C. Reagan-National Airport from Idaho, with most prices found around $350. If you aren’t able to travel to Washington, D.C. Reagan-National Airport during the month of August, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $380.

How far in advance should I book a flight from Idaho 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 $504 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 $221 on momondo.

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

You could potentially save up to 45% 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	$152
Fastest flight time	5h 56m
Direct flights	None

The best one-way flight to Washington, D.C. Reagan-National Airport from Idaho in the past 72 hours is $152. The best round-trip flight deal from Idaho to Washington, D.C. Reagan-National Airport found on momondo in the last 72 hours is $303.

The fastest flight from Idaho to Washington, D.C. Reagan-National Airport takes 5h 56m

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

Frequently asked questions about flying from Idaho to Washington, D.C. Reagan-National Airport

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?
There are 5 operators available for flights from Idaho to Washington, D.C. Reagan-National Airport as of August 2026.
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
Delta	PriceFrom $262	Free Cancellation	Rating 7.8 8,540 reviews	Search Delta flights
American Airlines	PriceFrom $296	Free Cancellation	Rating 7.1 12,025 reviews	Search American Airlines flights
United Airlines	PriceFrom $346	Free Cancellation	Rating 7.4 10,135 reviews	Search United Airlines flights
Alaska Airlines	PriceFrom $350	Free Cancellation	Rating 7.9 12,859 reviews	Search Alaska Airlines flights
Southwest	PriceFrom $390	Free Cancellation	Rating 8.0 4,201 reviews	Search Southwest flights

Alexandria

National Harbor

Arlington

Gettysburg

Laurel

Waldorf

Fredericksburg

Woodbridge

Gaithersburg

Linthicum Heights

Rockville

Silver Spring

Towson

Springfield

Colonial Beach

Fairfax

Edgewood

Glen Burnie

Tysons

College Park

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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Cheap flights from Idaho to Washington, D.C. from $152

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 10/6. 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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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

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

momondo Fare Finder

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

See travel insights to Washington, D.C. from

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

What is the cheapest month to fly to Washington, D.C. Reagan-National Airport?

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

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

What is the cheapest airline that flies from Idaho to Washington, D.C. Reagan-National?

What airlines fly to Washington, D.C. Reagan-National Airport?

How long does it take to fly to Washington, D.C. Reagan-National Airport?

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

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Idaho to Washington, D.C. Reagan-National Airport

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

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

Why use momondo?

An easier way to manage your Washington, D.C. Reagan-National Airport trip

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