What is the cheapest airline that flies from Idaho to Washington, D.C. Dulles Intl?

Delta, United Airlines, and American Airlines are the most popular carriers operating from Idaho to Washington, D.C. Dulles Intl

How long does it take to fly to Washington, D.C. Dulles Intl Airport?

Flight times from Idaho to Washington, D.C. Dulles Intl 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. Dulles Intl 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.

What airlines fly to Washington, D.C. Dulles Intl Airport?

United Airlines, Alaska Airlines and Delta are the top three most popular airlines that fly to Washington, D.C. Dulles Intl Airport from Idaho according to our data. United Airlines is the first choice among our users, with 57% of people opting to fly with this airline when traveling to Washington, D.C. Dulles Intl Airport. Keep in mind that there are 4 different airlines that fly to Washington, D.C. Dulles Intl Airport on a routine basis, so you have a few additional options to choose from.

How many flights depart from Idaho to Washington, D.C. Dulles Intl Airport on average per week?

As of February 2026, there are 1 flights per week flying from Idaho to Washington, D.C. Dulles Intl Airport. The most common day of the week flights depart is Sat, with 100% of flights taking off on this day.

How many operators does momondo search for flights from Idaho to Washington, D.C. Dulles Intl Airport?

The number of operators available for flights from Idaho to Washington, D.C. Dulles Intl Airport is 4 as of February 2026.

How old do you have to be to fly from Idaho to Washington, D.C. Dulles Intl Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Idaho to Washington, D.C. Dulles Intl Airport.

What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

The required travel and health documents for your Washington, D.C. Dulles Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington, D.C. Dulles Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$126 Cheap Flights from Idaho to Washington, D.C. Dulles Intl Airport in 2026

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

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

11:40 pm - 9:10 am

BOI

IAD

7h 30m

1 stop

7:00 am - 1:05 pm

IAD

BOI

8h 05m

1 stop

$251Delta

Wed, Apr 1 - Tue, Apr 7

1:07 pm - 11:55 pm

GEG

IAD

7h 48m

1 stop

7:00 am - 12:27 pm

IAD

GEG

8h 27m

1 stop

$251Delta

Sat, Apr 18 - Tue, Apr 28

1:45 pm - 11:49 pm

BOI

IAD

8h 04m

1 stop

12:14 pm - 11:46 pm

IAD

BOI

13h 32m

2 stops

$256Delta

Wed, Apr 1 - Tue, Apr 7

1:07 pm - 11:55 pm

GEG

IAD

7h 48m

1 stop

12:45 pm - 11:15 pm

IAD

GEG

13h 30m

2 stops

$256Delta

Sat, Apr 18 - Tue, Apr 28

6:37 pm - 8:48 am

BOI

IAD

12h 11m

2 stops

7:00 am - 12:51 pm

IAD

BOI

7h 51m

1 stop

$267American Airlines

Wed, Apr 1 - Tue, Apr 7

6:37 pm - 8:48 am

BOI

IAD

12h 11m

2 stops

7:00 am - 12:51 pm

IAD

BOI

7h 51m

1 stop

$279American Airlines

Wed, Apr 1 - Tue, Apr 7

8:51 pm - 7:34 am

BOI

IAD

8h 43m

1 stop

7:37 pm - 1:58 pm

IAD

BOI

20h 21m

1 stop

$281Alaska Airlines

Sat, May 16 - Sat, May 23

1:41 pm - 11:34 pm

GEG

IAD

6h 53m

1 stop

6:30 am - 12:37 pm

IAD

GEG

9h 07m

1 stop

$281United Airlines

Sat, May 16 - Sat, May 23

7:43 am - 5:41 pm

BOI

IAD

7h 58m

1 stop

6:47 pm - 1:52 pm

IAD

BOI

21h 05m

2 stops

$292Alaska Airlines

Sat, Apr 25 - Tue, Apr 28

2:05 pm - 12:55 am

BOI

IAD

8h 50m

1 stop

5:41 pm - 10:37 pm

IAD

BOI

6h 56m

1 stop

$311United Airlines

Wed, Jul 1 - Tue, Jul 7

United Airlines flights from Idaho to Washington, D.C. Dulles Intl Airport

Our best United Airlines deals on Idaho to Washington, D.C. Dulles Intl Airport flight tickets

United Airlines

Apr 15

GEG1:46 pmSpokane

6h 48m

1 stop

IAD11:34 pmWashington, D.C. Dulles Intl

Apr 18

IAD2:21 pmWashington, D.C. Dulles Intl

9h 50m

1 stop

GEG9:11 pmSpokane

$251

United Airlines

May 16

GEG1:41 pmSpokane

6h 53m

1 stop

IAD11:34 pmWashington, D.C. Dulles Intl

May 23

IAD6:30 amWashington, D.C. Dulles Intl

9h 07m

1 stop

GEG12:37 pmSpokane

$281

United Airlines

May 27

GEG1:41 pmSpokane

8h 04m

1 stop

IAD12:45 amWashington, D.C. Dulles Intl

May 30

IAD3:39 pmWashington, D.C. Dulles Intl

9h 51m

1 stop

GEG10:30 pmSpokane

$311

Alaska Airlines flights from Idaho to Washington, D.C. Dulles Intl Airport

Our best Alaska Airlines deals on Idaho to Washington, D.C. Dulles Intl Airport flight tickets

Alaska Airlines

May 16

BOI8:51 pmBoise Air Term. Gowen Fld

8h 43m

1 stop

IAD7:34 amWashington, D.C. Dulles Intl

May 23

IAD7:37 pmWashington, D.C. Dulles Intl

20h 21m

1 stop

BOI1:58 pmBoise Air Term. Gowen Fld

$281

Alaska Airlines

Apr 25

BOI7:43 amBoise Air Term. Gowen Fld

7h 58m

1 stop

IAD5:41 pmWashington, D.C. Dulles Intl

Apr 28

IAD6:47 pmWashington, D.C. Dulles Intl

21h 05m

2 stops

BOI1:52 pmBoise Air Term. Gowen Fld

$292

Alaska Airlines

May 16

GEG8:38 pmSpokane

7h 56m

1 stop

IAD7:34 amWashington, D.C. Dulles Intl

May 19

IAD7:37 pmWashington, D.C. Dulles Intl

29h 08m

1 stop

GEG9:45 pmSpokane

$297

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Wed 4/1

11:40 pm-9:10 am

1 stop7h 30m

Washington, D.C. Dulles Intl

Tue 4/7

7:00 am-1:05 pm

1 stop8h 05m

$251

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Sat 4/18

1:07 pm-11:55 pm

1 stop7h 48m

Washington, D.C. Dulles Intl

Tue 4/28

7:00 am-12:27 pm

1 stop8h 27m

$251

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Wed 4/1

1:45 pm-11:49 pm

1 stop8h 04m

Washington, D.C. Dulles Intl

Tue 4/7

12:14 pm-11:46 pm

2 stops13h 32m

$256

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Sat 4/18

1:07 pm-11:55 pm

1 stop7h 48m

Washington, D.C. Dulles Intl

Tue 4/28

12:45 pm-11:15 pm

2 stops13h 30m

$256

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Wed 4/1

6:37 pm-8:48 am

2 stops12h 11m

Washington, D.C. Dulles Intl

Tue 4/7

7:00 am-12:51 pm

1 stop7h 51m

$267

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Wed 4/1

6:37 pm-8:48 am

2 stops12h 11m

Washington, D.C. Dulles Intl

Tue 4/7

7:00 am-12:51 pm

1 stop7h 51m

$279

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Sat 5/16

8:51 pm-7:34 am

1 stop8h 43m

Washington, D.C. Dulles Intl

Sat 5/23

7:37 pm-1:58 pm

1 stop20h 21m

$281

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Sat 5/16

1:41 pm-11:34 pm

1 stop6h 53m

Washington, D.C. Dulles Intl

Sat 5/23

6:30 am-12:37 pm

1 stop9h 07m

$281

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Sat 4/25

7:43 am-5:41 pm

1 stop7h 58m

Washington, D.C. Dulles Intl

Tue 4/28

6:47 pm-1:52 pm

2 stops21h 05m

$292

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Wed 7/1

2:05 pm-12:55 am

1 stop8h 50m

Washington, D.C. Dulles Intl

Tue 7/7

5:41 pm-10:37 pm

1 stop6h 56m

$311

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. Dulles Intl 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. Dulles Intl Airport?

In general, May is the cheapest month to fly from Idaho to Washington, D.C. Dulles Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $341. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of May, then flying in April is also cheap. Prices for this month can be found on momondo for an average of $370.

Cheap Idaho to Washington, D.C. Dulles Intl Airport flight deals and tips

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

Fastest flight time	4h 15m
Direct flights	Sun

The fastest flight from Idaho to Washington, D.C. Dulles Intl Airport takes 4h 15m

Direct flights go from Idaho to Washington, D.C. Dulles Intl Airport on Sunday. There are no airlines offering direct flights.

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When did momondo last update prices for flights from Idaho to Washington, D.C. Dulles Intl Airport?
Prices for flights from Idaho to Washington, D.C. Dulles Intl Airport are updated daily.
How many operators does momondo search for flights from Idaho to Washington, D.C. Dulles Intl Airport?
The number of operators available for flights from Idaho to Washington, D.C. Dulles Intl Airport is 4 as of February 2026.
How old do you have to be to fly from Idaho to Washington, D.C. Dulles Intl Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Idaho to Washington, D.C. Dulles Intl Airport.
What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?
The required travel and health documents for your Washington, D.C. Dulles Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington, D.C. Dulles Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Idaho to Washington, D.C. Dulles Intl Airport

Compare and see reviews for airlines that fly from Idaho to Washington, D.C. Dulles Intl Airport with momondo

Airline	Rating	Free Cancellation	Price
Alaska Airlines	PriceFrom $141	Free Cancellation	Rating 8.0 11,937 reviews	Search Alaska Airlines flights
Delta	PriceFrom $257	Free Cancellation	Rating 7.9 8,235 reviews	Search Delta flights
United Airlines	PriceFrom $300	Free Cancellation	Rating 7.4 9,342 reviews	Search United Airlines flights
Southwest	PriceFrom $379	Free Cancellation	Rating 8.0 4,300 reviews	Search Southwest flights

Alexandria

National Harbor

Gettysburg

Arlington

Winchester

Waldorf

Woodbridge

Colonial Beach

Laurel

Towson

Silver Spring

Gaithersburg

Tysons

Fredericksburg

Rockville

Manassas

Springfield

Fairfax

Bethesda

Sterling

Why use momondo?

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

Finding the right flight to Washington, D.C. from Idaho is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Washington, D.C. quick and easy, saving you time and money.

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.?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight 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?

Yes momondo offers price alerts on flights to Washington, D.C. from Idaho. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Washington, D.C. Dulles Intl Airport trip

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Cheap flights from Idaho to Washington, D.C. from $126

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 4/29. 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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United Airlines flights from Idaho to Washington, D.C. Dulles Intl Airport

Our best United Airlines deals on Idaho to Washington, D.C. Dulles Intl Airport flight tickets

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Our best Alaska Airlines deals on Idaho to Washington, D.C. Dulles Intl Airport flight tickets

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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. Dulles Intl Airport

What is the cheapest month to fly to Washington, D.C. Dulles Intl Airport?

What is the cheapest airline that flies from Idaho to Washington, D.C. Dulles Intl?

What airlines fly to Washington, D.C. Dulles Intl Airport?

How many flights depart from Idaho to Washington, D.C. Dulles Intl Airport on average per week?

How long does it take to fly to Washington, D.C. Dulles Intl Airport?

Cheap Idaho to Washington, D.C. Dulles Intl Airport flight deals and tips

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

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Direct flights

Best airlines flying from Idaho to Washington, D.C. Dulles Intl Airport

Compare and see reviews for airlines that fly from Idaho to Washington, D.C. Dulles Intl 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. Dulles Intl Airport trip

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