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Washington, D.C.

$121+ Cheap flights from Idaho to Washington, D.C. (WAS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/14. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — WAS
Jul 27 — Aug 31
Mon 7/27
Mon 8/3
1 adult, Economy
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Cheap flight deals from Idaho to Washington, D.C.

Cheapest flights from Idaho to Washington, D.C.
Explore the most affordable flight options available from Idaho to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 27, 2026.

This Orbitz deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2712:24 pm
BOI
-
DCA
1 stop7h 35m
Frontier
Tue 9/17:00 am
DCA
-
BOI
1 stop7h 29m
Frontier
Deal found 6/23$242
This Frontier deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/161:24 pm
BOI
-
DCA
1 stop6h 35m
Frontier
Sat 7/256:00 pm
DCA
-
BOI
1 stop20h 29m
Frontier
Deal found 6/22$243
This Expedia deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/91:24 pm
BOI
-
DCA
1 stop21h 27m
Frontier
Tue 7/147:00 am
DCA
-
BOI
1 stop7h 29m
Frontier
Deal found 6/22$248
This Expedia deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/121:24 pm
BOI
-
DCA
1 stop21h 27m
Frontier
Thu 7/167:00 am
DCA
-
BOI
1 stop7h 29m
Frontier
Deal found 6/26$254
This Booking.com deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/91:24 pm
BOI
-
DCA
1 stop6h 35m
Frontier
Mon 7/131:59 pm
DCA
-
BOI
1 stop24h 30m
Frontier
Deal found 6/22$260
This Delta deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2412:14 pm
BOI
-
IAD
1 stop8h 42m
Delta
Wed 9/306:20 am
IAD
-
BOI
1 stop9h 24m
Delta
Deal found 6/23$293
This Delta deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/242:11 pm
BOI
-
DCA
1 stop7h 32m
Delta
Wed 9/306:05 am
DCA
-
BOI
1 stop9h 39m
Delta
Deal found 6/26$293
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1711:10 pm
BOI
-
BWI
1 stop8h 09m
Delta
Thu 8/206:05 am
BWI
-
BOI
1 stop9h 37m
Delta
Deal found 6/25$293
This American Airlines deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/265:40 am
GEG
-
IAD
1 stop9h 47m
American Airlines
Wed 9/22:53 pm
IAD
-
GEG
1 stop8h 49m
American Airlines
Deal found 6/26$295
This American Airlines deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/122:09 pm
GEG
-
DCA
1 stop6h 50m
American Airlines
Sat 9/267:40 am
DCA
-
GEG
1 stop8h 39m
American Airlines
Deal found 6/22$295
This Delta deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1711:10 pm
BOI
-
BWI
1 stop8h 09m
Delta
Tue 8/256:05 am
BWI
-
BOI
2 stops13h 14m
Delta
Deal found 6/26$298
This American Airlines deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2012:12 pm
BOI
-
IAD
1 stop8h 40m
American Airlines
Thu 8/276:09 am
IAD
-
BOI
1 stop9h 50m
American Airlines
Deal found 6/22$302

Find flight deals from Idaho to Washington, D.C.

Keep the following information in mind while searching for Idaho to Washington, D.C. flight deals. Data was last updated June 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$242
(Frontier)

One-way from

$121
(Priceline)

Popular in

December

Cheapest in

February

Average price

$568
Provider with most accurate pricing for Boise Air Term. Gowen Fld-Washington, D.C. (WAS) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-Washington, D.C. (WAS) flights.
Search Deals
From Idaho to Washington, D.C. (WAS)
Search Deals
One-way flight from Idaho to Washington, D.C. (WAS)
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($115 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Idaho to Washington, D.C. that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 27, 2026.
Use the filters below to find and compare flights from Idaho to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

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 7/30

11:10 pm-9:26 am

1 stop8h 16m

Washington, D.C. Dulles Intl

Thu 8/6

3:03 pm-9:57 pm

1 stop8h 54m

$293

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Thu 9/24

11:10 pm-9:10 am

1 stop8h 00m

Washington, D.C. Dulles Intl

Wed 9/30

6:20 am-1:44 pm

1 stop9h 24m

$293

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Sat 9/19

2:11 pm-12:40 am

1 stop8h 29m

Washington, D.C. Dulles Intl

Tue 9/22

7:25 am-3:17 pm

1 stop9h 52m

$293

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Sat 10/24

1:15 pm-11:46 pm

1 stop8h 31m

Washington, D.C. Dulles Intl

Sat 10/31

7:05 am-2:22 pm

1 stop9h 17m

$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

BoiseBaltimore

BOI - BWI

BOIBWI

Boise Air Term. Gowen Fld

Thu 10/1

11:10 pm-9:16 am

1 stop8h 06m

Baltimore/Washington

Sat 10/3

6:15 am-1:29 pm

1 stop9h 14m

$293

BoiseBaltimore

BOI - BWI

BOIBWI

Boise Air Term. Gowen Fld

Thu 9/24

11:10 pm-10:56 am

1 stop9h 46m

Baltimore/Washington

Sat 9/26

2:59 pm-8:57 pm

1 stop7h 58m

$293

BoiseBaltimore

BOI - BWI

BOIBWI

Boise Air Term. Gowen Fld

Tue 8/11

6:45 pm-6:20 am

1 stop9h 35m

Baltimore/Washington

Sat 8/15

2:57 pm-8:52 pm

1 stop7h 55m

$293

BoiseBaltimore

BOI - BWI

BOIBWI

Boise Air Term. Gowen Fld

Tue 9/29

6:45 am-9:30 pm

2 stops12h 45m

Baltimore/Washington

Tue 10/6

6:59 pm-11:55 pm

1 stop6h 56m

$298

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/25

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Idaho to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Idaho with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Idaho to Washington, D.C.

What is the cheapest month to book a flight from Idaho to Washington, D.C.?

Currently, May is the cheapest month in which you can book a flight from Idaho to Washington, D.C. (average of $78). Flying from Idaho to Washington, D.C. in June is currently the most expensive (average of $312). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from Idaho to Washington, D.C.?

How far ahead should I book a flight from Idaho to Washington, D.C.?

Booking 87 days in advance of your planned departure date is, on average, the best time to get cheap flights from Idaho to Washington, D.C.. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Related info for your journey

Find useful and relevant information for your journey from Idaho to Washington, D.C.. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    Airlines like Frontier, Delta, and United Airlines fly from Idaho to Washington, D.C. in about 6h 42m. The time it takes to get you to your destination can typically vary by up to 14h 45m. There are 2076 mi between Idaho and Washington, D.C.. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Idaho to Washington, D.C. one-way?

    One-way options have recently been found by users for as low as $80 on Frontier. Other airlines that offer cheap prices include Delta from $125 and American Airlines from $131 one-way.

  • What are the most popular routes from Idaho to Washington, D.C.?

    When deciding which route to take from Idaho to Washington, D.C. consider Spokane - Washington, D.C. Dulles Intl, Boise Air Term. Gowen Fld - Washington, D.C. Dulles Intl or Boise Air Term. Gowen Fld - Washington, D.C. Reagan-National as they are the most popular.

  • Can I find deals for flights from Idaho to Washington, D.C. that include hotel bookings?

    Yes. In addition to deals on Idaho to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Idaho to Washington, D.C.?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Idaho to Washington, D.C..

  • Can I find deals for business class flights from Idaho to Washington, D.C.?

    Yes. Cheapflights offers flight deals from Idaho to Washington, D.C. by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Idaho to Washington, D.C.?

    Currently, May is the cheapest month in which you can book a flight from Idaho to Washington, D.C. (average of $78). Flying from Idaho to Washington, D.C. in June is currently the most expensive (average of $312). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
Arlington
Tysons
Owings Mills
Springfield
Lanham
Reston
Herndon
Rockville
Hyattsville
Falls Church
Laurel
Fredericksburg
Hanover
Manassas
Waldorf
Silver Spring
Largo
Clinton
Hunt Valley

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Idaho to Washington, D.C.

See prices for flight routes from nearby airports that may be better suited for you.
Dallas/Fort Worth to Dulles Intl flights
Dallas/Fort Worth to Reagan-National flights
Los Angeles to Reagan-National flights
Los Angeles to Dulles Intl flights
Atlanta to Dulles Intl flights
San Francisco to Reagan-National flights
San Francisco to Dulles Intl flights
Denver to Dulles Intl flights
Boston to Reagan-National flights
O'Hare Intl to Reagan-National flights
Boston to Dulles Intl flights
Seattle to Reagan-National flights
Seattle to Dulles Intl flights
Atlanta to Reagan-National flights
Hobby to Reagan-National flights
Tampa to Dulles Intl flights
Hobby to Dulles Intl flights
Orlando to Dulles Intl flights
Fort Lauderdale to Dulles Intl flights
O'Hare Intl to Dulles Intl flights
Ontario to Dulles Intl flights
Miami to Dulles Intl flights
Sky Harbor Intl to Dulles Intl flights
Orlando to Reagan-National flights
Tampa to Reagan-National flights
Minneapolis to Reagan-National flights
George Bush Intcntl to Dulles Intl flights
Minneapolis to Dulles Intl flights
Fort Lauderdale to Reagan-National flights
Ontario to Reagan-National flights
Miami to Reagan-National flights
Austin to Dulles Intl flights
John F Kennedy Intl to Dulles Intl flights
Denver to Reagan-National flights
George Bush Intcntl to Reagan-National flights
Charlotte to Dulles Intl flights
Austin to Reagan-National flights
San Diego to Dulles Intl flights
Newark to Dulles Intl flights
Midway to Dulles Intl flights
Portland to Dulles Intl flights
Detroit to Dulles Intl flights
San Jose to Dulles Intl flights
John F Kennedy Intl to Reagan-National flights
LaGuardia to Reagan-National flights
Sky Harbor Intl to Reagan-National flights
LaGuardia to Dulles Intl flights
Nashville to Reagan-National flights
Newark to Reagan-National flights
St. Louis to Dulles Intl flights

Top 5 airlines flying from Idaho to Washington, D.C.

Discover the top 5 airlines that operate flights from Idaho to Washington, D.C.. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$196Average$425FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$245Average$490FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$277Average$702FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$278Average$568FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$340Average$488FlexibilityNo cancel feeOn-time63%

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