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

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

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 51m on average. Another popular route from Washington, D.C. to Idaho is flying from Baltimore to Boise, which will take roughly 6h 57m. Keep in mind that layovers or delays could extend your travel time.

What airlines fly to Idaho?

United Airlines, Delta and Southwest are the top three most popular airlines that fly to Idaho from Washington, D.C. according to our data. United Airlines is the first choice among our users, with 48% 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.

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 November 2026.

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.

$161 Cheap Flights from Washington, D.C. to Idaho in 2026/27

Discover deals from 900+ travel sites with momondo.

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

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:47 am - 12:59 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld

7h 12m1 stop Chicago O'Hare Intl

2:42 pm - 11:59 pmBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National

7h 17m1 stop Dallas/Fort Worth

$321American Airlines

Mon, Dec 7 - Tue, Dec 15

5:00 am - 1:23 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld

10h 23m1 stop Dallas/Fort Worth

12:26 pm - 11:57 pmBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National

9h 31m1 stop Dallas/Fort Worth

$321American Airlines

Wed, Feb 24 - Mon, Mar 1

6:05 am - 2:05 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld

10h 00m1 stop Minneapolis St Paul

3:21 pm - 11:57 pmBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National

6h 36m1 stop Minneapolis St Paul

$321Delta

Sat, Dec 12 - Sat, Dec 19

6:05 am - 12:42 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld

8h 37m1 stop Minneapolis St Paul

1:47 pm - 10:41 pmBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National

6h 54m1 stop Atlanta Hartsfield-Jackson

$321Delta

Thu, Dec 3 - Fri, Dec 4

8:00 am - 3:28 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld

9h 28m1 stop Seattle/Tacoma Intl

5:40 am - 4:00 pmBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National

8h 20m1 stop Portland

$321Alaska Airlines

Thu, Nov 26 - Fri, Nov 27

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

11h 00m2 stops Dallas Love Field Oakland

8:55 pm - 8:50 amBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National

9h 55m2 stops Las Vegas Harry Reid Intl Nashville Intl

$331Southwest

Wed, Feb 24 - Mon, Mar 1

2:11 pm - 9:33 pmIAD Washington, D.C. Dulles Intl-BOI Boise Air Term. Gowen Fld

9h 22m1 stop Denver Intl

2:35 pm - 11:26 pmBOI Boise Air Term. Gowen Fld-IAD Washington, D.C. Dulles Intl

6h 51m1 stop Denver Intl

$343United Airlines

Thu, Jan 7 - Thu, Jan 14

5:17 pm - 11:49 pmIAD Washington, D.C. Dulles Intl-BOI Boise Air Term. Gowen Fld

8h 32m1 stop Seattle/Tacoma Intl

7:55 pm - 5:10 amBOI Boise Air Term. Gowen Fld-IAD Washington, D.C. Dulles Intl

7h 15m1 stop Las Vegas Harry Reid Intl

$344Multiple Airlines

Tue, Nov 17 - Sat, Nov 21

7:05 am - 2:18 pmIAD Washington, D.C. Dulles Intl-BOI Boise Air Term. Gowen Fld

9h 13m1 stop Seattle/Tacoma Intl

6:31 am - 4:28 pmBOI Boise Air Term. Gowen Fld-IAD Washington, D.C. Dulles Intl

7h 57m1 stop Seattle/Tacoma Intl

$360Alaska Airlines

Fri, Dec 25 - Thu, Dec 31

2:25 pm - 9:19 pmIAD Washington, D.C. Dulles Intl-IDA Idaho Falls Fanning Field

8h 54m1 stop Denver Intl

7:00 am - 5:10 pmIDA Idaho Falls Fanning Field-IAD Washington, D.C. Dulles Intl

8h 10m1 stop Denver Intl

$394United Airlines

Thu, Dec 24 - Wed, Jan 6

Cheap last minute flights

Enter your travel dates to find the best prices.

10:30 am - 7:24 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld

10h 54m1 stop Phoenix Sky Harbor Intl

2:41 pm - 11:59 pmBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National

7h 18m1 stop Dallas/Fort Worth

$403American Airlines

Mon, Nov 9 - Tue, Nov 10

5:54 am - 12:37 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld

8h 43m1 stop Chicago O'Hare Intl

1:24 pm - 11:55 pmBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National

8h 31m1 stop Chicago O'Hare Intl

$403American Airlines

Sat, Nov 7 - Sat, Nov 14

6:59 pm - 11:59 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld

7h 00m1 stop Minneapolis St Paul

11:10 pm - 9:14 amBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National

8h 04m1 stop Atlanta Hartsfield-Jackson

$403Delta

Mon, Nov 9 - Thu, Nov 12

6:59 pm - 11:59 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld

7h 00m1 stop Minneapolis St Paul

2:26 pm - 11:46 pmBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National

7h 20m1 stop Atlanta Hartsfield-Jackson

$403Delta

Mon, Nov 9 - Sat, Nov 14

12:40 pm - 6:03 pmIAD Washington, D.C. Dulles Intl-BOI Boise Air Term. Gowen Fld

7h 23m1 stop Denver Intl

2:51 pm - 11:15 pmBOI Boise Air Term. Gowen Fld-IAD Washington, D.C. Dulles Intl

6h 24m1 stop Denver Intl

$403United Airlines

Sat, Nov 7 - Sat, Nov 14

5:20 pm - 11:46 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld

8h 26m1 stop Portland

10:49 am - 9:59 pmBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National

9h 10m1 stop Seattle/Tacoma Intl

$403Alaska Airlines

Mon, Nov 9 - Tue, Nov 17

5:20 pm - 11:46 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld

8h 26m1 stop Portland

5:43 am - 4:11 pmBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National

8h 28m1 stop Portland

$403Alaska Airlines

Mon, Nov 9 - Wed, Nov 11

7:00 am - 1:23 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld

8h 23m1 stop Phoenix Sky Harbor Intl

2:41 pm - 12:01 amBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National

7h 20m1 stop Dallas/Fort Worth

$403American Airlines

Sat, Nov 7 - Sat, Nov 14

4:05 pm - 9:59 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld

7h 54m1 stop Atlanta Hartsfield-Jackson

3:00 pm - 11:37 pmBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National

6h 37m1 stop Minneapolis St Paul

$403Delta

Mon, Nov 9 - Mon, Nov 16

12:40 pm - 6:03 pmIAD Washington, D.C. Dulles Intl-BOI Boise Air Term. Gowen Fld

7h 23m1 stop Denver Intl

2:51 pm - 11:15 pmBOI Boise Air Term. Gowen Fld-IAD Washington, D.C. Dulles Intl

6h 24m1 stop Denver Intl

$533United Airlines

Sat, Nov 7 - Sat, Nov 14

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Delta flights from Washington, D.C. to Idaho

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

Delta

Dec 16

IAD6:00 amWashington, D.C. Dulles Intl

9h 44m

1 stop

BOI1:44 pmBoise Air Term. Gowen Fld

Jan 4

BOI12:02 pmBoise Air Term. Gowen Fld

9h 48m

1 stop

IAD11:50 pmWashington, D.C. Dulles Intl

$321

Delta

Feb 27

DCA7:19 amWashington, D.C. Reagan-National

8h 54m

1 stop

BOI2:13 pmBoise Air Term. Gowen Fld

Mar 4

BOI3:08 pmBoise Air Term. Gowen Fld

6h 38m

1 stop

DCA11:46 pmWashington, D.C. Reagan-National

$332

Delta

Jan 8

IAD7:10 amWashington, D.C. Dulles Intl

9h 00m

1 stop

BOI2:10 pmBoise Air Term. Gowen Fld

Jan 10

BOI3:05 pmBoise Air Term. Gowen Fld

6h 46m

1 stop

IAD11:51 pmWashington, D.C. Dulles Intl

$356

Alaska Airlines flights from Washington, D.C. to Idaho

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

Alaska Airlines

Dec 15

DCA5:20 pmWashington, D.C. Reagan-National

8h 26m

1 stop

BOI11:46 pmBoise Air Term. Gowen Fld

Dec 31

BOI10:03 amBoise Air Term. Gowen Fld

9h 56m

1 stop

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

$360

Alaska Airlines

Dec 7

DCA10:59 amWashington, D.C. Reagan-National

13h 28m

1 stop

BOI10:27 pmBoise Air Term. Gowen Fld

Dec 15

BOI7:57 amBoise Air Term. Gowen Fld

11h 03m

2 stops

DCA9:00 pmWashington, D.C. Reagan-National

$370

Alaska Airlines

Jan 9

DCA5:05 pmWashington, D.C. Reagan-National

8h 39m

1 stop

BOI11:44 pmBoise Air Term. Gowen Fld

Jan 13

BOI11:10 amBoise Air Term. Gowen Fld

8h 49m

1 stop

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

$373

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

Washington, D.C.Boise

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

DCABOI

Washington, D.C. Reagan-National

Mon 12/7

7:47 am-12:59 pm

1 stop7h 12m

Boise Air Term. Gowen Fld

Tue 12/15

2:42 pm-11:59 pm

1 stop7h 17m

$321

Washington, D.C.Boise

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

DCABOI

Washington, D.C. Reagan-National

Wed 2/24

5:00 am-1:23 pm

1 stop10h 23m

Boise Air Term. Gowen Fld

Mon 3/1

12:26 pm-11:57 pm

1 stop9h 31m

$321

Washington, D.C.Boise

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

DCABOI

Washington, D.C. Reagan-National

Sat 12/12

6:05 am-2:05 pm

1 stop10h 00m

Boise Air Term. Gowen Fld

Sat 12/19

3:21 pm-11:57 pm

1 stop6h 36m

$321

Washington, D.C.Boise

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

DCABOI

Washington, D.C. Reagan-National

Thu 12/3

6:05 am-12:42 pm

1 stop8h 37m

Boise Air Term. Gowen Fld

Fri 12/4

1:47 pm-10:41 pm

1 stop6h 54m

$321

Washington, D.C.Boise

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

DCABOI

Washington, D.C. Reagan-National

Thu 11/26

8:00 am-3:28 pm

1 stop9h 28m

Boise Air Term. Gowen Fld

Fri 11/27

5:40 am-4:00 pm

1 stop8h 20m

$321

Washington, D.C.Boise

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

DCABOI

Washington, D.C. Reagan-National

Wed 2/24

6:10 am-3:10 pm

2 stops11h 00m

Boise Air Term. Gowen Fld

Mon 3/1

8:55 pm-8:50 am

2 stops9h 55m

$331

Washington, D.C.Boise

IAD Washington, D.C. Dulles Intl - BOI Boise Air Term. Gowen Fld

IADBOI

Washington, D.C. Dulles Intl

Thu 1/7

2:11 pm-9:33 pm

1 stop9h 22m

Boise Air Term. Gowen Fld

Thu 1/14

2:35 pm-11:26 pm

1 stop6h 51m

$343

Washington, D.C.Boise

IAD Washington, D.C. Dulles Intl - BOI Boise Air Term. Gowen Fld

IADBOI

Washington, D.C. Dulles Intl

Tue 11/17

5:17 pm-11:49 pm

1 stop8h 32m

Boise Air Term. Gowen Fld

Sat 11/21

7:55 pm-5:10 am

1 stop7h 15m

$344

Washington, D.C.Boise

IAD Washington, D.C. Dulles Intl - BOI Boise Air Term. Gowen Fld

IADBOI

Washington, D.C. Dulles Intl

Fri 12/25

7:05 am-2:18 pm

1 stop9h 13m

Boise Air Term. Gowen Fld

Thu 12/31

6:31 am-4:28 pm

1 stop7h 57m

$360

Washington, D.C.Idaho Falls

IAD Washington, D.C. Dulles Intl - IDA Idaho Falls Fanning Field

IADIDA

Washington, D.C. Dulles Intl

Thu 12/24

2:25 pm-9:19 pm

1 stop8h 54m

Idaho Falls Fanning Field

Wed 1/6

7:00 am-5:10 pm

1 stop8h 10m

$394

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, May 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 $389. If you don’t want to visit Idaho in May, then you should wait until November to fly from Washington, D.C., when ticket prices are also cheap, with an average price of $402.

What is the cheapest Washington, D.C. to Idaho flight route?

Fly from Washington, D.C. Dulles Intl to Idaho Falls Fanning Field for the best Washington, D.C. - Idaho flight prices

What cabin class options are available on Washington, D.C. to Idaho flights?

There is only 1 cabin class available to choose from on Washington, D.C. to Idaho flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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

You could potentially save up to 19% 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

Best Price Found	$161
Fastest flight time	4h 40m
Direct flights	None

The best one-way flight to Idaho from Washington, D.C. in the past 72 hours is $161. The best round-trip flight deal from Washington, D.C. to Idaho found on momondo in the last 72 hours is $321.

The fastest flight from Washington, D.C. to Idaho takes 4h 40m

There are no direct flights from Washington, D.C. to Idaho. There are no popular flight routes from Washington, D.C. to Idaho.

Search flight deals

Frequently asked questions about flying from Washington, D.C. to Idaho

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 November 2026.
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.
What is the most popular plane model from Washington, D.C. to Idaho?
Based on momondo bookings for flights between Washington, D.C. and Idaho, the leading plane model is Airbus A321neo, making up 100.00% of the total bookings.

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
Delta	PriceFrom $200	Free Cancellation	Rating 7.8 8,699 reviews	Search Delta flights
United Airlines	PriceFrom $255	Free Cancellation	Rating 7.3 10,460 reviews	Search United Airlines flights
American Airlines	PriceFrom $262	Free Cancellation	Rating 7.0 12,228 reviews	Search American Airlines flights
Southwest	PriceFrom $320	Free Cancellation	Rating 8.0 4,215 reviews	Search Southwest flights
Alaska Airlines	PriceFrom $388	Free Cancellation	Rating 7.9 13,136 reviews	Search Alaska Airlines 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.