HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Washington, D.C.

$115+ 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 6/17. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — WAS
Jun 11 — Jun 181
Thu 6/11
Thu 6/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Idaho to Washington, D.C. with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 May 12, 2026.

This American Airlines deal was found by Cheapflights users on 5/12. 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.
Fri 5/2210:00 am
JAC
-
DCA
1 stop8h 00m
American Airlines
Mon 5/258:31 am
DCA
-
JAC
1 stop8h 38m
American Airlines
Deal found 5/12$241
This Booking.com deal was found by Cheapflights users on 5/12. 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.
Tue 6/91:25 pm
BOI
-
DCA
1 stop21h 32m
Frontier
Tue 6/167:00 am
DCA
-
BOI
1 stop7h 30m
Frontier
Deal found 5/12$242
This Mytrip deal was found by Cheapflights users on 5/7. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/131:25 pm
BOI
-
DCA
1 stop6h 34m
Frontier
Mon 8/176:00 pm
DCA
-
BOI
1 stop20h 09m
Frontier
Deal found 5/7$254
This Booking.com deal was found by Cheapflights users on 5/11. 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.
Mon 6/112:33 pm
GEG
-
DCA
1 stop25h 26m
Frontier
Fri 6/57:00 am
DCA
-
GEG
1 stop7h 38m
Frontier
Deal found 5/11$262
This Delta deal was found by Cheapflights users on 5/12. 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.
Sat 9/191:43 pm
BOI
-
IAD
1 stop8h 27m
Delta
Tue 9/227:10 am
IAD
-
BOI
1 stop10h 28m
Delta
Deal found 5/12$263
This Delta deal was found by Cheapflights users on 5/11. 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.
Tue 9/226:00 am
BOI
-
DCA
1 stop7h 40m
Delta
Tue 9/295:00 pm
DCA
-
BOI
1 stop8h 56m
Delta
Deal found 5/11$263
This Delta deal was found by Cheapflights users on 5/11. 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.
Sat 9/195:40 am
BOI
-
BWI
1 stop6h 15m
Delta
Tue 9/227:10 am
BWI
-
BOI
1 stop7h 04m
Delta
Deal found 5/11$263
This Delta deal was found by Cheapflights users on 5/11. 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.
Tue 9/222:45 pm
BOI
-
IAD
1 stop7h 10m
Delta
Tue 9/295:15 pm
IAD
-
BOI
2 stops8h 14m
Delta
Deal found 5/11$268
This Expedia deal was found by Cheapflights users on 5/11. 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 9/31:04 pm
BOI
-
DCA
1 stop25h 53m
Frontier
Tue 9/157:00 am
DCA
-
BOI
1 stop7h 04m
Frontier
Deal found 5/11$270
This Delta deal was found by Cheapflights users on 5/11. 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.
Wed 5/2712:55 pm
BOI
-
BWI
2 stops9h 56m
Delta
Tue 6/21:59 pm
BWI
-
BOI
2 stops12h 05m
Delta
Deal found 5/11$273
This Delta deal was found by Cheapflights users on 5/10. 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.
Tue 7/1410:48 pm
GEG
-
IAD
1 stop7h 38m
Delta
Tue 7/216:00 am
IAD
-
GEG
1 stop8h 39m
Delta
Deal found 5/10$275
This Trip.com deal was found by Cheapflights users on 5/8. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/211:25 pm
BOI
-
DCA
1 stop6h 33m
Frontier
Sun 5/247:00 am
DCA
-
BOI
1 stop7h 30m
Frontier
Deal found 5/8$275

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 May 12, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$242
(Booking.com)

One-way from

$115
(Mytrip)

Popular in

December

Cheapest in

February

Average price

$345
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. 24% potential increase in price ($131 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 May 12, 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

Wed 10/21

3:22 pm-11:29 pm

1 stop6h 07m

Washington, D.C. Reagan-National

Thu 10/22

4:40 pm-11:52 pm

1 stop9h 12m

$263

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

Wed 7/1

5:30 am-6:46 pm

2 stops11h 16m

Washington, D.C. Reagan-National

Thu 7/9

2:45 pm-12:05 am

2 stops11h 20m

$273

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Tue 7/14

10:48 pm-9:26 am

1 stop7h 38m

Washington, D.C. Dulles Intl

Tue 7/21

6:00 am-11:39 am

1 stop8h 39m

$275

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

Tue 9/22

6:00 am-3:40 pm

1 stop7h 40m

Washington, D.C. Reagan-National

Tue 9/29

6:00 am-2:03 pm

2 stops10h 03m

$278

BoiseBaltimore

BOI - BWI

BOIBWI

Boise Air Term. Gowen Fld

Sat 7/4

2:50 pm-11:13 pm

1 stop6h 23m

Baltimore/Washington

Wed 7/8

2:08 pm-12:05 am

2 stops11h 57m

$283

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Thu 6/4

2:16 pm-11:28 pm

1 stop6h 12m

Washington, D.C. Reagan-National

Tue 6/9

7:45 am-1:18 pm

1 stop8h 33m

$292

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Fri 9/25

11:30 pm-9:50 am

1 stop8h 20m

Washington, D.C. Dulles Intl

Wed 9/30

6:15 am-2:03 pm

1 stop9h 48m

$297

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Sat 9/12

5:20 am-3:40 pm

1 stop7h 20m

Washington, D.C. Reagan-National

Fri 9/18

4:40 pm-11:44 pm

1 stop10h 04m

$301

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

Fri 8/21

8:25 am-11:48 pm

2 stops13h 23m

Washington, D.C. Reagan-National

Mon 8/24

6:00 am-12:49 pm

1 stop8h 49m

$312

SpokaneBaltimore

GEG - BWI

GEGBWI

Spokane

Wed 6/3

1:11 pm-5:45 am

2 stops13h 34m

Baltimore/Washington

Sat 6/6

6:00 am-11:21 am

1 stop8h 21m

$314

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/9

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

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.

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

Booking 89 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.

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 $105). Flying from Idaho to Washington, D.C. in July is currently the most expensive (average of $300). 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.?

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 Delta, Alaska Airlines, and Southwest fly from Idaho to Washington, D.C. in about 6h 05m. The time it takes to get you to your destination can typically vary by up to 17h 43m. There are 2052 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 $90 on Frontier. Other airlines that offer cheap prices include Delta from $125 and American Airlines from $171 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 - Baltimore/Washington 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 $105). Flying from Idaho to Washington, D.C. in July is currently the most expensive (average of $300). 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
Tysons
Owings Mills
Springfield
Arlington
Herndon
Rockville
Hyattsville
Manassas
Fredericksburg
Silver Spring
Hanover
Laurel
Woodbridge
Waldorf
Largo
Clinton
Hunt Valley
Cordova
Reston

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
Los Angeles to Reagan-National flights
Los Angeles to Dulles Intl flights
Seattle to Dulles Intl flights
Atlanta to Dulles Intl flights
San Francisco to Dulles Intl flights
Seattle to Reagan-National flights
Boston to Dulles Intl flights
San Francisco to Reagan-National flights
Dallas/Fort Worth to Reagan-National flights
Boston to Reagan-National flights
Denver to Dulles Intl flights
Orlando to Dulles Intl flights
Hobby to Reagan-National flights
Atlanta to Reagan-National flights
O'Hare Intl to Dulles Intl flights
Hobby to Dulles Intl flights
O'Hare Intl to Reagan-National flights
San Diego to Dulles Intl flights
Tampa to Dulles Intl flights
George Bush Intcntl to Dulles Intl flights
George Bush Intcntl to Reagan-National flights
Austin to Dulles Intl flights
Fort Lauderdale to Dulles Intl flights
Sky Harbor Intl to Dulles Intl flights
Tampa to Reagan-National flights
Ontario to Dulles Intl flights
Minneapolis to Reagan-National flights
Minneapolis to Dulles Intl flights
Miami to Dulles Intl flights
Midway to Dulles Intl flights
Portland to Dulles Intl flights
Denver to Reagan-National flights
Austin to Reagan-National flights
Detroit to Dulles Intl flights
Ontario to Reagan-National flights
Orlando to Reagan-National flights
Charlotte to Dulles Intl flights
John F Kennedy Intl to Dulles Intl flights
Sky Harbor Intl to Reagan-National flights
Salt Lake City to Dulles Intl flights
Detroit to Reagan-National flights
Miami to Reagan-National flights
San Diego to Reagan-National flights
John F Kennedy Intl to Reagan-National flights
Nashville to Reagan-National flights
LaGuardia to Reagan-National flights
Fort Lauderdale to Reagan-National flights
St. Louis to Dulles Intl flights
San Jose to Dulles Intl flights

Top 6 airlines flying from Idaho to Washington, D.C.

Discover the top 6 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 May 12, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$78Average$334FlexibilityNo cancel feeOn-time62%
DeltaCheapest$222Average$410FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$245Average$464FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$277Average$744FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$278Average$554FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$340Average$509FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.