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

$125+ 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 12/19. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — WAS
Nov 25 — Dec 21
Mon 11/25
Mon 12/2
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.

Discover tips and strategies to find the most affordable flight options for your journey from Idaho (USID) to Washington, D.C. (WAS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 20, 2024.

Find 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 November 20, 2024.

This United Airlines deal was found by Cheapflights users on 11/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/188:00 amBOI - IAD
1 stop8h 50mUnited Airlines
Wed 12/256:30 amIAD - BOI
1 stop8h 58mUnited Airlines
Deal found 11/20$310
This Mytrip deal was found by Cheapflights users on 11/19. 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 11/2811:51 amBOI - BWI
1 stop17h 27mSpirit Airlines
Wed 12/47:00 pmBWI - BOI
2 stops17h 58mSpirit Airlines
Deal found 11/19$312
This Delta deal was found by Cheapflights users on 11/20. 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 12/111:43 pmBOI - DCA
1 stop7h 57mDelta
Mon 12/164:00 pmDCA - BOI
2 stops10h 43mDelta
Deal found 11/20$345
This Delta deal was found by Cheapflights users on 11/18. 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 12/91:25 pmGEG - IAD
1 stop7h 24mDelta
Fri 12/136:07 amIAD - GEG
1 stop10h 05mDelta
Deal found 11/18$362
This Delta deal was found by Cheapflights users on 11/18. 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 12/92:20 pmGEG - DCA
1 stop6h 37mDelta
Fri 12/136:10 amDCA - GEG
1 stop10h 02mDelta
Deal found 11/18$362
This Southwest deal was found by Cheapflights users on 11/18. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/97:55 amGEG - IAD
2 stops12h 05mSouthwest
Fri 12/134:00 pmIAD - GEG
1 stop11h 05mSouthwest
Deal found 11/18$371
This Mytrip deal was found by Cheapflights users on 11/19. 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 11/2811:51 amBOI - BWI
1 stop17h 27mMultiple Airlines
Wed 12/47:19 pmBWI - BOI
3 stops23h 19mMultiple Airlines
Deal found 11/19$371
This Delta deal was found by Cheapflights users on 11/19. 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.
Sun 12/1512:52 pmGEG - BWI
1 stop8h 46mDelta
Tue 12/177:10 pmBWI - GEG
1 stop7h 03mDelta
Deal found 11/19$373
This Delta deal was found by Cheapflights users on 11/20. 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 11/286:00 amBOI - IAD
1 stop7h 48mDelta
Wed 12/46:00 amIAD - BOI
1 stop8h 40mDelta
Deal found 11/20$413
This Southwest deal was found by Cheapflights users on 11/18. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/91:30 pmGEG - BWI
1 stop6h 40mSouthwest
Fri 12/135:15 pmBWI - GEG
2 stops9h 35mSouthwest
Deal found 11/18$418
This United Airlines deal was found by Cheapflights users on 11/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/285:00 amBOI - BWI
1 stop8h 13mUnited Airlines
Wed 12/45:25 pmBWI - BOI
1 stop7h 19mUnited Airlines
Deal found 11/19$436
This Delta deal was found by Cheapflights users on 11/19. 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 12/93:26 pmBOI - BWI
1 stop6h 29mDelta
Fri 12/137:05 pmBWI - BOI
1 stop6h 40mDelta
Deal found 11/19$438

Find flights from Idaho to Washington, D.C. within your budget

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 2,629,791 searches. Data last updated November 20, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

BoiseBaltimore

BOI - BWI

BOIBWI

Boise Air Term. Gowen Fld

Mon 1/6

11:57 am-10:46 pm

1 stop8h 49m

Baltimore/Washington

Mon 1/13

10:37 am-6:38 pm

1 stop10h 01m

$279

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Wed 12/18

8:00 am-6:50 pm

1 stop8h 50m

Washington, D.C. Dulles Intl

Wed 12/25

6:30 am-1:28 pm

1 stop8h 58m

$310

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

Tue 1/14

7:00 am-5:53 pm

1 stop8h 53m

Washington, D.C. Reagan-National

Sun 1/19

5:32 pm-1:01 pm

1 stop21h 29m

$310

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Wed 1/15

1:35 pm-12:18 am

1 stop8h 43m

Washington, D.C. Dulles Intl

Wed 1/22

6:00 am-1:57 pm

2 stops9h 57m

$315

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

Wed 1/15

1:35 pm-11:39 pm

1 stop8h 04m

Washington, D.C. Reagan-National

Wed 1/22

6:00 am-1:57 pm

2 stops9h 57m

$315

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Wed 2/19

10:51 am-9:59 pm

1 stop8h 08m

Washington, D.C. Reagan-National

Wed 2/26

9:00 am-11:31 pm

1 stop17h 31m

$316

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Sat 1/25

7:00 am-7:35 pm

2 stops10h 35m

Washington, D.C. Dulles Intl

Sat 2/1

9:11 am-9:52 pm

2 stops14h 41m

$320

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Wed 2/19

6:00 am-6:04 pm

1 stop9h 04m

Washington, D.C. Reagan-National

Wed 2/26

4:25 pm-12:03 am

2 stops10h 38m

$321

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Tue 2/11

5:30 am-3:05 pm

1 stop6h 35m

Washington, D.C. Dulles Intl

Sun 2/16

5:50 pm-11:05 pm

1 stop8h 15m

$326

SpokaneBaltimore

GEG - BWI

GEGBWI

Spokane

Wed 2/19

8:43 pm-5:56 pm

1 stop18h 13m

Baltimore/Washington

Wed 2/26

6:56 pm-11:44 pm

1 stop7h 48m

$326

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/19

Showing 1-10 of 60 results
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.

Travel insights for flights from Idaho to Washington, D.C.

Get recent, data-driven insights about flights from Idaho to Washington, D.C. including ideal travel times, pricing trends, and more.

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

Currently, September is the cheapest month in which you can book a flight from Idaho to Washington, D.C. (average of $300). Flying from Idaho to Washington, D.C. in June is currently the most expensive (average of $376). 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.

What is the cheapest time of day to fly from ID to WAS?

Find hourly flight availability from Idaho to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 20, 2024.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Idaho to Washington, D.C. as you normally would.

Rainfall in Washington, D.C. by month

Plan your trip to Washington, D.C. by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Washington, D.C. ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. when rainfall is around 2.6 in.

Temperature in Washington, D.C. by month

Plan your trip to Washington, D.C. by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Washington, D.C., use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

Reviews of airlines servicing Washington, D.C.

Get insights into the airlines that provide service to Washington, D.C.. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Washington, D.C.. Reviews last updated November 20, 2024.
Peruse reviews from past customers who have flown with Delta, American Airlines and United Airlines from Idaho to Washington, D.C. to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
5,014 reviews

Boarding

8.2

Comfort

8.1

Crew

8.7

Overall

8.1

Entertainment

7.7

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Southwest
8.1
Very good
5,014 reviews
Southwest
8.1
Very good
5,014 reviews

Boarding

8.2

Comfort

8.1

Crew

8.7

Overall

8.1

Entertainment

7.7

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Alaska Airlines
8.0
Very good
9,461 reviews
Southwest
8.1
Very good
5,014 reviews

Boarding

8.2

Comfort

8.1

Crew

8.7

Overall

8.1

Entertainment

7.7

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Delta
8.0
Very good
8,756 reviews
Southwest
8.1
Very good
5,014 reviews

Boarding

8.2

Comfort

8.1

Crew

8.7

Overall

8.1

Entertainment

7.7

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

United Airlines
7.4
Good
9,171 reviews
Southwest
8.1
Very good
5,014 reviews

Boarding

8.2

Comfort

8.1

Crew

8.7

Overall

8.1

Entertainment

7.7

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
5,014 reviews

Boarding

8.2

Comfort

8.1

Crew

8.7

Overall

8.1

Entertainment

7.7

Food

7.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

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.

  • 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 $125 on Spirit Airlines. Other airlines that offer cheap prices include Delta from $147 and Southwest from $153 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, Spokane - Baltimore/Washington or Boise Air Term. Gowen Fld - Washington, D.C. Dulles Intl 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, September is the cheapest month in which you can book a flight from Idaho to Washington, D.C. (average of $300). Flying from Idaho to Washington, D.C. in June is currently the most expensive (average of $376). 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

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.
Los Angeles to Reagan-National flights
Los Angeles to Dulles Intl flights
Dallas/Fort Worth to Dulles Intl flights
Boston to Dulles Intl flights
Dallas/Fort Worth to Reagan-National flights
Seattle to Dulles Intl flights
Boston to Reagan-National flights
Atlanta to Dulles Intl flights
San Francisco to Dulles Intl flights
San Francisco to Reagan-National flights
Atlanta to Reagan-National flights
Seattle to Reagan-National flights
O'Hare Intl to Dulles Intl flights
Hobby to Reagan-National flights
Orlando to Reagan-National flights
O'Hare Intl to Reagan-National flights
Orlando to Dulles Intl flights
Denver to Dulles Intl flights
Denver to Reagan-National flights
Miami to Reagan-National flights
Hobby to Dulles Intl flights
LaGuardia to Reagan-National flights
George Bush Intcntl to Dulles Intl flights
Newark to Dulles Intl flights
Austin to Dulles Intl flights
LaGuardia to Dulles Intl flights
Charlotte to Dulles Intl flights
Tampa to Dulles Intl flights
Newark to Reagan-National flights
Fort Lauderdale to Reagan-National flights
Miami to Dulles Intl flights
John F Kennedy Intl to Dulles Intl flights
George Bush Intcntl to Reagan-National flights
John F Kennedy Intl to Reagan-National flights
Tampa to Reagan-National flights
Minneapolis to Reagan-National flights
Fort Lauderdale to Dulles Intl flights
San Diego to Dulles Intl flights
Minneapolis to Dulles Intl flights
Detroit to Reagan-National flights
Sky Harbor Intl to Dulles Intl flights
Ontario to Reagan-National flights
Midway to Dulles Intl flights
Salt Lake City to Dulles Intl flights
Portland to Dulles Intl flights
Salt Lake City to Reagan-National flights
Jacksonville to Dulles Intl flights
Nashville to Reagan-National flights
Ontario to Dulles Intl flights
Portland to Reagan-National 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 2,629,791 searches. Data last updated November 20, 2024.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$185Average$306FlexibilityNo cancel feeOn-time65%
DeltaCheapest$316Average$501FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$326Average$714FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$336Average$669FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$355Average$546FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$397Average$501FlexibilityNo cancel feeOn-time75%
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.
View all available airlines