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

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

What airlines fly to Idaho?

Delta, United Airlines and Southwest are the top three most popular airlines that fly to Idaho from Washington, D.C. according to our data. Delta is the first choice among our users, with 39% of people opting to fly with this airline when traveling to Idaho. Keep in mind that there are 5 different airlines that fly to Idaho on a routine basis, so you have a few additional options to choose from.

How long is the flight from Washington, D.C. to Idaho?

Flight times from Washington, D.C. to Idaho vary, but if you’re flying out of Washington, D.C. and flying into Boise (one of the most popular routes), then the duration is 6h 58m on average. Another popular route from Washington, D.C. to Idaho is flying from Baltimore to Boise, which will take roughly 7h 39m. Keep in mind that layovers or delays could extend your travel time.

When did momondo last update prices for flights from Washington, D.C. to Idaho?

Prices for flights from Washington, D.C. to Idaho were last updated today.

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

The number of operators available for flights from Washington, D.C. to Idaho is 5 as of October 2025.

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

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 Washington, D.C. to Idaho.

What documentation or ID do you need to fly to Idaho?

The travel and health documents you'll need for your trip to Idaho 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 Idaho. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$76 Cheap Flights from Washington, D.C. to Idaho in 2025/26

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

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:00 pm - 11:49 amDCA-BOI

19h 49m1 stop

12:44 pm - 1:06 pmBOI-DCA

22h 22m1 stop

$138Frontier

Find Deal

Sat, Dec 6 - Fri, Dec 12

2:00 pm - 11:49 amDCA-BOI

23h 49m1 stop

12:44 pm - 9:59 pmBOI-DCA

7h 15m1 stop

$161Frontier

Find Deal

Sat, Dec 6 - Sun, Dec 14

6:00 am - 2:55 pmBWI-GEG

11h 55m2 stops

9:25 am - 12:22 amGEG-BWI

11h 57m2 stops

$256Delta

Find Deal

Thu, Dec 4 - Tue, Dec 9

12:30 pm - 9:29 pmIAD-JAC

10h 59m2 stops

2:31 pm - 10:52 pmJAC-IAD

6h 21m1 stop

$285Delta

Find Deal

Wed, Dec 17 - Thu, Dec 25

8:00 am - 3:10 pmDCA-BOI

9h 10m1 stop

5:40 am - 4:01 pmBOI-DCA

8h 21m1 stop

$290Alaska Airlines

Find Deal

Sat, Jan 17 - Sun, Jan 18

6:30 am - 11:06 amIAD-JAC

6h 36m1 stop

6:06 pm - 5:19 amJAC-IAD

9h 13m1 stop

$299United Airlines

Find Deal

Tue, Dec 16 - Sun, Dec 21

5:01 pm - 11:59 pmDCA-BOI

8h 58m1 stop

10:00 am - 9:59 pmBOI-DCA

9h 59m1 stop

$300Alaska Airlines

Find Deal

Tue, Jan 27 - Wed, Jan 28

4:11 pm - 9:32 pmDCA-BOI

7h 21m1 stop

8:41 am - 9:36 pmBOI-DCA

10h 55m1 stop

$316United Airlines

Find Deal

Sat, Feb 21 - Sat, Feb 28

9:05 am - 5:15 pmIAD-BOI

10h 10m2 stops

7:45 am - 3:50 pmBOI-IAD

6h 05m1 stop

$326Southwest

Find Deal

Tue, Jan 27 - Wed, Jan 28

4:40 pm - 10:30 pmDCA-BOI

7h 50m1 stop

11:20 am - 11:15 pmBOI-DCA

9h 55m2 stops

$326Southwest

Find Deal

Tue, Jan 27 - Wed, Jan 28

Southwest flights from Washington, D.C. to Idaho

Our best Southwest deals on Washington, D.C. to Idaho flight tickets

Southwest

Jan 27

IAD9:05 amWashington, D.C. Dulles Intl

10h 10m

2 stops

BOI5:15 pmBoise Air Term. Gowen Fld

Jan 28

BOI7:45 amBoise Air Term. Gowen Fld

6h 05m

1 stop

IAD3:50 pmWashington, D.C. Dulles Intl

$326

Find similar

Southwest

Dec 16

BWI4:30 pmBaltimore/Washington

7h 55m

1 stop

BOI10:25 pmBoise Air Term. Gowen Fld

Jan 5

BOI8:10 pmBoise Air Term. Gowen Fld

7h 35m

1 stop

BWI5:45 amBaltimore/Washington

$329

Find similar

Southwest

Jan 27

DCA9:30 amWashington, D.C. Reagan-National

9h 45m

2 stops

BOI5:15 pmBoise Air Term. Gowen Fld

Jan 28

BOI1:30 pmBoise Air Term. Gowen Fld

7h 25m

2 stops

DCA10:55 pmWashington, D.C. Reagan-National

$331

Find similar

Frontier flights from Washington, D.C. to Idaho

Our best Frontier deals on Washington, D.C. to Idaho flight tickets

Frontier

Dec 6

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

19h 49m

1 stop

BOI11:49 amBoise Air Term. Gowen Fld

Dec 12

BOI12:44 pmBoise Air Term. Gowen Fld

22h 22m

1 stop

DCA1:06 pmWashington, D.C. Reagan-National

$138

Find similar

Frontier

Dec 6

DCA2:00 pmWashington, D.C. Reagan-National

23h 49m

1 stop

BOI11:49 amBoise Air Term. Gowen Fld

Dec 14

BOI12:44 pmBoise Air Term. Gowen Fld

7h 15m

1 stop

DCA9:59 pmWashington, D.C. Reagan-National

$161

Find similar

Frontier

Jan 14

DCA2:00 pmWashington, D.C. Reagan-National

23h 54m

1 stop

BOI11:54 amBoise Air Term. Gowen Fld

Jan 18

BOI12:54 pmBoise Air Term. Gowen Fld

7h 05m

1 stop

DCA9:59 pmWashington, D.C. Reagan-National

$175

Find similar

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Boise

DCA - BOI

DCABOI

Washington, D.C. Reagan-National

Sat 12/6

6:00 pm-11:49 am

1 stop19h 49m

Boise Air Term. Gowen Fld

Fri 12/12

12:44 pm-1:06 pm

1 stop22h 22m

$138

Washington, D.C.Boise

DCA - BOI

DCABOI

Washington, D.C. Reagan-National

Sat 12/6

2:00 pm-11:49 am

1 stop23h 49m

Boise Air Term. Gowen Fld

Sun 12/14

12:44 pm-9:59 pm

1 stop7h 15m

$161

BaltimoreSpokane

BWI - GEG

BWIGEG

Baltimore/Washington

Thu 12/4

6:00 am-2:55 pm

2 stops11h 55m

Spokane

Tue 12/9

9:25 am-12:22 am

2 stops11h 57m

$256

Washington, D.C.Jackson

IAD - JAC

IADJAC

Washington, D.C. Dulles Intl

Wed 12/17

12:30 pm-9:29 pm

2 stops10h 59m

Jackson Hole

Thu 12/25

2:31 pm-10:52 pm

1 stop6h 21m

$285

Washington, D.C.Boise

DCA - BOI

DCABOI

Washington, D.C. Reagan-National

Sat 1/17

8:00 am-3:10 pm

1 stop9h 10m

Boise Air Term. Gowen Fld

Sun 1/18

5:40 am-4:01 pm

1 stop8h 21m

$290

Washington, D.C.Jackson

IAD - JAC

IADJAC

Washington, D.C. Dulles Intl

Tue 12/16

6:30 am-11:06 am

1 stop6h 36m

Jackson Hole

Sun 12/21

6:06 pm-5:19 am

1 stop9h 13m

$299

Washington, D.C.Boise

DCA - BOI

DCABOI

Washington, D.C. Reagan-National

Tue 1/27

5:01 pm-11:59 pm

1 stop8h 58m

Boise Air Term. Gowen Fld

Wed 1/28

10:00 am-9:59 pm

1 stop9h 59m

$300

Washington, D.C.Boise

DCA - BOI

DCABOI

Washington, D.C. Reagan-National

Sat 2/21

4:11 pm-9:32 pm

1 stop7h 21m

Boise Air Term. Gowen Fld

Sat 2/28

8:41 am-9:36 pm

1 stop10h 55m

$316

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Tue 1/27

9:05 am-5:15 pm

2 stops10h 10m

Boise Air Term. Gowen Fld

Wed 1/28

7:45 am-3:50 pm

1 stop6h 05m

$326

Washington, D.C.Boise

DCA - BOI

DCABOI

Washington, D.C. Reagan-National

Tue 1/27

4:40 pm-10:30 pm

1 stop7h 50m

Boise Air Term. Gowen Fld

Wed 1/28

11:20 am-11:15 pm

2 stops9h 55m

$326

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 Washington, D.C. to Idaho

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 Idaho?

In general, April is the cheapest month to fly from Washington, D.C. to Idaho. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $296. If you don’t want to visit Idaho in April, then you should wait until May to fly from Washington, D.C., when ticket prices are also cheap, with an average price of $300.

What is the cheapest day to depart on your flight to Idaho?

Our data shows that Wednesday is the least expensive day to fly to Idaho. Tickets to fly out on this day can be as low as $434. On the other hand, Monday is the most expensive day to depart from Washington, D.C. because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $711.

What is the cheapest time of day to depart on your flight to Idaho?

According to our data, the cheapest time of day to fly to Idaho is at noon. momondo users have found flights departing from Washington, D.C. to Idaho at noon for as low as $431. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In the evening is when there is more demand to fly to Idaho, so prices are often more expensive at around $671 per ticket.

Can stopping save me money on Washington, D.C. to Idaho flights?

You could potentially save up to 66% on your flight if you consider stops on a Washington, D.C. to Idaho flight.

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

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

Fastest flight time	4h 30m
Direct flights	Sun
Airports in Idaho	1 airport

The fastest flight from Washington, D.C. to Idaho takes 4h 30m

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

There is 1 airport near Idaho: Jackson Hole (JAC)

Search flight deals

When did momondo last update prices for flights from Washington, D.C. to Idaho?
Prices for flights from Washington, D.C. to Idaho were last updated today.
How many operators does momondo search for flights from Washington, D.C. to Idaho?
The number of operators available for flights from Washington, D.C. to Idaho is 5 as of October 2025.
How old do you have to be to fly from Washington, D.C. to Idaho?
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 Washington, D.C. to Idaho.
What documentation or ID do you need to fly to Idaho?
The travel and health documents you'll need for your trip to Idaho 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 Idaho. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Washington, D.C. to Idaho

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

Airline	Rating	Free Cancellation	Price
Alaska Airlines	PriceFrom $182	Free Cancellation	Rating 8.0 11,217 reviews	Search Alaska Airlines flights
Delta	PriceFrom $202	Free Cancellation	Rating 7.9 7,998 reviews	Search Delta flights
United Airlines	PriceFrom $222	Free Cancellation	Rating 7.4 8,998 reviews	Search United Airlines flights
American Airlines	PriceFrom $300	Free Cancellation	Rating 7.2 11,035 reviews	Search American Airlines flights
Southwest	PriceFrom $347	Free Cancellation	Rating 8.0 4,243 reviews	Search Southwest flights

Why use momondo?

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

Finding the right flight to Idaho from Washington, D.C. 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 Idaho quick and easy, saving you time and money.

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

Yes. All flights to Idaho from Washington, D.C. on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once all potential Washington, D.C. to Idaho 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 Washington, D.C. to Idaho right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Washington, D.C. to Idaho flights. All you need is a valid email address and we will do the rest; it is that quick and easy.