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

Frontier, Delta, and American Airlines 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, United Airlines and American 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 48% 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 Twin Falls and flying into Washington, D.C. Dulles Intl Airport (one of the most popular routes), then the duration is 6h 02m on average. Another popular route from Idaho to Washington, D.C. Reagan-National Airport is flying from Boise to Washington, D.C. Dulles Intl Airport, which will take roughly 6h 05m. 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 February 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.

$100 Cheap Flights from Idaho to Washington, D.C. Reagan-National Airport in 2026

Q: How many flights depart from Idaho to Washington, D.C. Reagan-National Airport on average per week?

1 flights are operational weekly from Idaho to Washington, D.C. Reagan-National Airport as of February 2026. The most popular departure day for this route is Sat, with 100% of flights per week taking off on this day.

1 adult

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

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:40 am - 3:27 pm

BOI

DCA

7h 47m

1 stop

4:39 pm - 12:17 am

DCA

BOI

9h 38m

1 stop

$251Delta

Sat, Apr 25 - Tue, Apr 28

2:10 pm - 11:43 pm

GEG

DCA

6h 33m

1 stop

4:39 pm - 12:20 am

DCA

GEG

10h 41m

1 stop

$251Delta

Wed, Apr 22 - Wed, Apr 29

11:53 am - 9:59 pm

BOI

DCA

8h 06m

1 stop

8:59 am - 9:26 pm

DCA

BOI

14h 27m

1 stop

$266Multiple Airlines

Thu, Apr 23 - Wed, Apr 29

11:53 am - 9:59 pm

BOI

DCA

8h 06m

1 stop

8:59 am - 11:59 pm

DCA

BOI

17h 00m

2 stops

$272Multiple Airlines

Thu, Apr 23 - Wed, Apr 29

12:25 pm - 11:50 pm

GEG

DCA

8h 25m

1 stop

6:00 am - 11:44 am

DCA

GEG

8h 44m

1 stop

$279American Airlines

Tue, Mar 24 - Tue, Mar 31

12:25 pm - 11:50 pm

GEG

DCA

8h 25m

1 stop

6:00 am - 12:29 pm

DCA

GEG

9h 29m

1 stop

$294American Airlines

Wed, Apr 1 - Tue, Apr 7

11:09 am - 10:49 pm

GEG

DCA

8h 40m

1 stop

6:00 am - 11:30 am

DCA

GEG

8h 30m

1 stop

$311United Airlines

Wed, May 27 - Sat, May 30

11:09 am - 10:49 pm

GEG

DCA

8h 40m

1 stop

6:00 am - 3:12 pm

DCA

GEG

12h 12m

2 stops

$316United Airlines

Wed, May 27 - Sat, May 30

8:00 am - 9:59 pm

IDA

DCA

11h 59m

1 stop

6:59 pm - 5:19 pm

DCA

IDA

24h 20m

2 stops

$491Alaska Airlines

Fri, Mar 13 - Tue, Mar 17

5:20 pm - 9:02 pm

IDA

DCA

25h 42m

2 stops

6:59 pm - 10:52 pm

DCA

IDA

29h 53m

2 stops

$519Alaska Airlines

Wed, Mar 11 - Tue, Mar 17

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

Mar 24

GEG12:25 pmSpokane

8h 25m

1 stop

DCA11:50 pmWashington, D.C. Reagan-National

Mar 31

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

8h 44m

1 stop

GEG11:44 amSpokane

$279

American Airlines

Apr 1

GEG12:25 pmSpokane

8h 25m

1 stop

DCA11:50 pmWashington, D.C. Reagan-National

Apr 7

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

9h 29m

1 stop

GEG12:29 pmSpokane

$294

American Airlines

Apr 1

JAC1:44 pmJackson Hole

8h 06m

1 stop

DCA11:50 pmWashington, D.C. Reagan-National

Apr 5

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

8h 18m

1 stop

JAC12:18 pmJackson Hole

$304

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

Our best United Airlines deals on Idaho to Washington, D.C. Reagan-National Airport flight tickets

United Airlines

May 27

GEG11:09 amSpokane

8h 40m

1 stop

DCA10:49 pmWashington, D.C. Reagan-National

May 30

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

8h 30m

1 stop

GEG11:30 amSpokane

$311

United Airlines

May 27

GEG11:09 amSpokane

8h 40m

1 stop

DCA10:49 pmWashington, D.C. Reagan-National

May 30

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

12h 12m

2 stops

GEG3:12 pmSpokane

$316

United Airlines

Apr 17

GEG7:10 amSpokane

6h 54m

1 stop

DCA5:04 pmWashington, D.C. Reagan-National

Apr 21

DCA11:55 amWashington, D.C. Reagan-National

9h 56m

1 stop

GEG6:51 pmSpokane

$319

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

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

Sat 4/25

5:40 am-3:27 pm

1 stop7h 47m

Washington, D.C. Reagan-National

Tue 4/28

4:39 pm-12:17 am

1 stop9h 38m

$251

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Wed 4/22

2:10 pm-11:43 pm

1 stop6h 33m

Washington, D.C. Reagan-National

Wed 4/29

4:39 pm-12:20 am

1 stop10h 41m

$251

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

Thu 4/23

11:53 am-9:59 pm

1 stop8h 06m

Washington, D.C. Reagan-National

Wed 4/29

8:59 am-9:26 pm

1 stop14h 27m

$266

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

Thu 4/23

11:53 am-9:59 pm

1 stop8h 06m

Washington, D.C. Reagan-National

Wed 4/29

8:59 am-11:59 pm

2 stops17h 00m

$272

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Tue 3/24

12:25 pm-11:50 pm

1 stop8h 25m

Washington, D.C. Reagan-National

Tue 3/31

6:00 am-11:44 am

1 stop8h 44m

$279

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Wed 4/1

12:25 pm-11:50 pm

1 stop8h 25m

Washington, D.C. Reagan-National

Tue 4/7

6:00 am-12:29 pm

1 stop9h 29m

$294

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Wed 5/27

11:09 am-10:49 pm

1 stop8h 40m

Washington, D.C. Reagan-National

Sat 5/30

6:00 am-11:30 am

1 stop8h 30m

$311

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Wed 5/27

11:09 am-10:49 pm

1 stop8h 40m

Washington, D.C. Reagan-National

Sat 5/30

6:00 am-3:12 pm

2 stops12h 12m

$316

Idaho FallsWashington, D.C.

IDA - DCA

IDADCA

Idaho Falls Fanning Field

Fri 3/13

8:00 am-9:59 pm

1 stop11h 59m

Washington, D.C. Reagan-National

Tue 3/17

6:59 pm-5:19 pm

2 stops24h 20m

$491

Idaho FallsWashington, D.C.

IDA - DCA

IDADCA

Idaho Falls Fanning Field

Wed 3/11

5:20 pm-9:02 pm

2 stops25h 42m

Washington, D.C. Reagan-National

Tue 3/17

6:59 pm-10:52 pm

2 stops29h 53m

$519

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

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Other information

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

The month of February is, on average, the cheapest month to fly to Washington, D.C. Reagan-National Airport from Idaho, with most prices found around $380. If you aren’t able to travel to Washington, D.C. Reagan-National Airport during the month of February, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $410.

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 $508 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 61% 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	5h 59m
Direct flights	None

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. 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?
There are 5 operators available for flights from Idaho to Washington, D.C. Reagan-National Airport as of February 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 $194	Free Cancellation	Rating 7.9 8,241 reviews	Search Delta flights
Alaska Airlines	PriceFrom $300	Free Cancellation	Rating 8.0 11,928 reviews	Search Alaska Airlines flights
American Airlines	PriceFrom $300	Free Cancellation	Rating 7.2 11,338 reviews	Search American Airlines flights
United Airlines	PriceFrom $327	Free Cancellation	Rating 7.4 9,341 reviews	Search United Airlines flights
Southwest	PriceFrom $355	Free Cancellation	Rating 8.0 4,299 reviews	Search Southwest flights

Alexandria

National Harbor

Gettysburg

Arlington

Waldorf

Woodbridge

Colonial Beach

Laurel

Silver Spring

Tysons

Towson

Fredericksburg

Gaithersburg

Rockville

Manassas

Springfield

Fairfax

Bethesda

Linthicum Heights

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.

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

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Cheap flights from Idaho to Washington, D.C. from $100

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 4/23. 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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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

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

Our best United 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 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 many flights depart from Idaho to Washington, D.C. Reagan-National Airport on average per week?

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

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

Fastest flight time

Direct flights

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?

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

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

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

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

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

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

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