What is the cheapest airline that flies from Idaho to District of Columbia?

Frontier, Delta, and United Airlines are the most popular carriers operating from Idaho to District of Columbia

How many flights depart from Idaho to District of Columbia on average per week?

10 flights are operational weekly from Idaho to District of Columbia as of June 2026. The most popular departure day for this route is Mon, with 20% of flights per week taking off on this day.

What airlines fly to District of Columbia?

United Airlines, Delta and Southwest are the top three most popular airlines that fly to District of Columbia from Idaho according to our data. United Airlines is the first choice among our users, with 36% of people opting to fly with this airline when traveling to District of Columbia. Keep in mind that there are 5 different airlines that fly to District of Columbia on a routine basis, so you have a few additional options to choose from.

How long is the flight from Idaho to District of Columbia?

On average, it takes 6h 04m to fly from Idaho to District of Columbia if you fly out of Twin Falls (the most popular airport in Idaho) and into Washington, D.C. Dulles Intl Airport (the most popular airport in District of Columbia). If you’re flying out of Boise and into Washington, D.C. Dulles Intl Airport, then the flight time is around 6h 11m.

When did momondo last update prices for flights from Idaho to District of Columbia?

Prices for flights from Idaho to District of Columbia are updated daily.

How many operators does momondo search for flights from Idaho to District of Columbia?

The number of operators available for flights from Idaho to District of Columbia is 5 as of June 2026.

How old do you have to be to fly from Idaho to District of Columbia?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Idaho to District of Columbia.

What documentation or ID do you need to fly to District of Columbia?

The required travel and health documents for your District of Columbia 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 District of Columbia. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$121 Cheap Flights from Idaho to District of Columbia in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Idaho to District of Columbia

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

12:24 pm - 9:59 pm

BOI

DCA

7h 35m

1 stop

7:00 am - 12:29 pm

DCA

BOI

7h 29m

1 stop

$242Frontier

Thu, Aug 27 - Tue, Sep 1

1:24 pm - 12:51 pm

BOI

DCA

21h 27m

1 stop

7:00 am - 12:29 pm

DCA

BOI

7h 29m

1 stop

$254Frontier

Sun, Jul 12 - Thu, Jul 16

12:14 pm - 10:56 pm

BOI

IAD

8h 42m

1 stop

6:20 am - 1:44 pm

IAD

BOI

9h 24m

1 stop

$293Delta

Thu, Sep 24 - Wed, Sep 30

2:11 pm - 11:43 pm

BOI

DCA

7h 32m

1 stop

6:05 am - 1:44 pm

DCA

BOI

9h 39m

1 stop

$293Delta

Thu, Sep 24 - Wed, Sep 30

5:40 am - 6:27 pm

GEG

IAD

9h 47m

1 stop

2:53 pm - 8:42 pm

IAD

GEG

8h 49m

1 stop

$295American Airlines

Wed, Aug 26 - Wed, Sep 2

12:45 pm - 11:58 pm

GEG

DCA

8h 13m

1 stop

7:29 am - 12:48 pm

DCA

GEG

8h 19m

1 stop

$295American Airlines

Wed, Oct 28 - Sat, Oct 31

1:24 pm - 4:59 pm

BOI

DCA

25h 35m

1 stop

7:00 am - 12:29 pm

DCA

BOI

7h 29m

1 stop

$303Frontier

Thu, Jul 23 - Sun, Jul 26

5:00 am - 5:50 pm

GEG

IAD

9h 50m

1 stop

6:30 am - 12:35 pm

IAD

GEG

9h 05m

1 stop

$312United Airlines

Wed, Sep 2 - Mon, Sep 7

5:00 am - 3:42 pm

GEG

IAD

7h 42m

1 stop

6:30 am - 12:47 pm

IAD

GEG

9h 17m

1 stop

$320United Airlines

Wed, Oct 28 - Sun, Nov 1

6:15 am - 5:00 pm

GEG

DCA

7h 45m

1 stop

1:00 pm - 10:05 pm

DCA

GEG

12h 05m

2 stops

$340Southwest

Wed, Aug 26 - Wed, Sep 2

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Delta flights from Idaho to District of Columbia

Our best Delta deals on Idaho to District of Columbia flight tickets

Delta

Sep 24

BOI12:14 pmBoise Air Term. Gowen Fld

8h 42m

1 stop

IAD10:56 pmWashington, D.C. Dulles Intl

Sep 30

IAD6:20 amWashington, D.C. Dulles Intl

9h 24m

1 stop

BOI1:44 pmBoise Air Term. Gowen Fld

$293

Delta

Aug 25

GEG1:23 pmSpokane

7h 16m

1 stop

IAD11:39 pmWashington, D.C. Dulles Intl

Sep 2

IAD6:00 pmWashington, D.C. Dulles Intl

8h 09m

1 stop

GEG11:09 pmSpokane

$307

Delta

Sep 4

BOI2:53 pmBoise Air Term. Gowen Fld

6h 28m

1 stop

IAD11:21 pmWashington, D.C. Dulles Intl

Sep 9

IAD6:20 amWashington, D.C. Dulles Intl

9h 24m

1 stop

BOI1:44 pmBoise Air Term. Gowen Fld

$317

United Airlines flights from Idaho to District of Columbia

Our best United Airlines deals on Idaho to District of Columbia flight tickets

United Airlines

Sep 2

GEG5:00 amSpokane

9h 50m

1 stop

IAD5:50 pmWashington, D.C. Dulles Intl

Sep 7

IAD6:30 amWashington, D.C. Dulles Intl

9h 05m

1 stop

GEG12:35 pmSpokane

$312

United Airlines

Oct 28

GEG5:00 amSpokane

7h 42m

1 stop

IAD3:42 pmWashington, D.C. Dulles Intl

Nov 1

IAD6:30 amWashington, D.C. Dulles Intl

9h 17m

1 stop

GEG12:47 pmSpokane

$320

United Airlines

Jul 8

BOI7:05 pmBoise Air Term. Gowen Fld

8h 48m

1 stop

IAD5:53 amWashington, D.C. Dulles Intl

Jul 12

IAD6:10 amWashington, D.C. Dulles Intl

7h 22m

1 stop

BOI11:32 amBoise Air Term. Gowen Fld

$353

momondo Fare Finder

Use the filters below to find and compare flights from Idaho to District of Columbia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

Thu 8/27

12:24 pm-9:59 pm

1 stop7h 35m

Washington, D.C. Reagan-National

Tue 9/1

7:00 am-12:29 pm

1 stop7h 29m

$242

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

Sun 7/12

1:24 pm-12:51 pm

1 stop21h 27m

Washington, D.C. Reagan-National

Thu 7/16

7:00 am-12:29 pm

1 stop7h 29m

$254

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Thu 9/24

12:14 pm-10:56 pm

1 stop8h 42m

Washington, D.C. Dulles Intl

Wed 9/30

6:20 am-1:44 pm

1 stop9h 24m

$293

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

Thu 9/24

2:11 pm-11:43 pm

1 stop7h 32m

Washington, D.C. Reagan-National

Wed 9/30

6:05 am-1:44 pm

1 stop9h 39m

$293

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Wed 8/26

5:40 am-6:27 pm

1 stop9h 47m

Washington, D.C. Dulles Intl

Wed 9/2

2:53 pm-8:42 pm

1 stop8h 49m

$295

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Wed 10/28

12:45 pm-11:58 pm

1 stop8h 13m

Washington, D.C. Reagan-National

Sat 10/31

7:29 am-12:48 pm

1 stop8h 19m

$295

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

Thu 7/23

1:24 pm-4:59 pm

1 stop25h 35m

Washington, D.C. Reagan-National

Sun 7/26

7:00 am-12:29 pm

1 stop7h 29m

$303

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Wed 9/2

5:00 am-5:50 pm

1 stop9h 50m

Washington, D.C. Dulles Intl

Mon 9/7

6:30 am-12:35 pm

1 stop9h 05m

$312

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Wed 10/28

5:00 am-3:42 pm

1 stop7h 42m

Washington, D.C. Dulles Intl

Sun 11/1

6:30 am-12:47 pm

1 stop9h 17m

$320

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Wed 8/26

6:15 am-5:00 pm

1 stop7h 45m

Washington, D.C. Reagan-National

Wed 9/2

1:00 pm-10:05 pm

2 stops12h 05m

$340

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 District of Columbia

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 District of Columbia?

In general, May is the cheapest month to fly from Idaho to District of Columbia. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $78. If you don’t want to visit District of Columbia in May, then you should wait until December to fly from Idaho, when ticket prices are also cheap, with an average price of $162.

Can stopping save me money on Idaho to District of Columbia flights?

You could potentially save up to 65% on your flight if you consider stops on a Idaho to District of Columbia flight.

Cheap Idaho to District of Columbia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Idaho to District of Columbia

Fastest flight time	6h 04m
Direct flights	None

The fastest flight from Idaho to District of Columbia takes 6h 04m

There are no direct flights from Idaho to District of Columbia. There are no popular flight routes from Idaho to District of Columbia.

Search flight deals

Frequently asked questions about flying from Idaho to District of Columbia

When did momondo last update prices for flights from Idaho to District of Columbia?
Prices for flights from Idaho to District of Columbia are updated daily.
How many operators does momondo search for flights from Idaho to District of Columbia?
The number of operators available for flights from Idaho to District of Columbia is 5 as of June 2026.
How old do you have to be to fly from Idaho to District of Columbia?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Idaho to District of Columbia.
What documentation or ID do you need to fly to District of Columbia?
The required travel and health documents for your District of Columbia 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 District of Columbia. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Idaho to District of Columbia

Compare and see reviews for airlines that fly from Idaho to District of Columbia with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $196	Free Cancellation	Rating 7.8 8,454 reviews	Search Delta flights
Alaska Airlines	PriceFrom $245	Free Cancellation	Rating 7.9 12,589 reviews	Search Alaska Airlines flights
American Airlines	PriceFrom $277	Free Cancellation	Rating 7.1 11,774 reviews	Search American Airlines flights
United Airlines	PriceFrom $278	Free Cancellation	Rating 7.4 9,899 reviews	Search United Airlines flights
Southwest	PriceFrom $340	Free Cancellation	Rating 7.9 4,246 reviews	Search Southwest flights

Why use momondo?

Why should I use momondo to find a flight deal from Idaho to District of Columbia?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Idaho to District of Columbia. momondo saves you time and could save you money on your trip.

Can I find flights from Idaho to District of Columbia with flexible booking policies on momondo?

All flight searches from Idaho to District of Columbia on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Idaho to District of Columbia?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to District of Columbia from Idaho.

I’m not ready to book a flight from Idaho to District of Columbia right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to District of Columbia 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.