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Washington, D.C.

$93+ 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 9/18. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — WAS
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
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Cheap 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 July 31, 2025.

Round-trip from

$203
(Priceline)

One-way from

$93
(Mytrip)

Popular in

March

Cheapest in

August

Average price

$471
From Idaho to Washington, D.C. (WAS)
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One-way flight from Idaho to Washington, D.C. (WAS)
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Highest demand for flights based on searches. 1% potential increase in price ($7 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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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 July 31, 2025.

This Priceline deal was found by Cheapflights users on 7/31. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/216:06 pmBOI - BWI
1 stop9h 09mSpirit Airlines
Mon 8/256:30 amBWI - BOI
1 stop12h 41mSpirit Airlines
Deal found 7/31$203
This American Airlines deal was found by Cheapflights users on 7/30. 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 9/257:44 amJAC - IAD
1 stop7h 06mAmerican Airlines
Mon 9/296:25 amIAD - JAC
1 stop10h 12mAmerican Airlines
Deal found 7/30$217
This Gotogate deal was found by Cheapflights users on 7/31. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2112:33 pmBOI - BWI
1 stop27h 08mMultiple Airlines
Thu 8/288:09 amBWI - BOI
1 stop11h 02mMultiple Airlines
Deal found 7/31$251
This Delta deal was found by Cheapflights users on 7/31. 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 10/291:00 pmJAC - IAD
1 stop8h 33mDelta
Wed 11/127:20 amIAD - JAC
1 stop6h 57mDelta
Deal found 7/31$257
This Mytrip deal was found by Cheapflights users on 7/29. 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.
Sun 9/79:06 pmGEG - BWI
1 stop17h 51mMultiple Airlines
Thu 9/115:45 amBWI - GEG
2 stops17h 31mMultiple Airlines
Deal found 7/29$259
This FlightHub deal was found by Cheapflights users on 7/31. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1812:22 pmBOI - DCA
1 stop7h 37mFrontier
Wed 9/241:00 pmDCA - BOI
1 stop24h 37mFrontier
Deal found 7/31$265
This United Airlines deal was found by Cheapflights users on 7/31. 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.
Sat 12/202:30 pmJAC - IAD
Nonstop4h 15mUnited Airlines
Sat 1/39:00 amIAD - JAC
Nonstop4h 40mUnited Airlines
Deal found 7/31$269
This FlightHub deal was found by Cheapflights users on 7/31. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/511:53 amGEG - DCA
1 stop7h 06mFrontier
Wed 9/101:00 pmDCA - GEG
1 stop24h 58mFrontier
Deal found 7/31$275
This Hawaiian Airlines deal was found by Cheapflights users on 7/31. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/296:28 amBOI - BWI
1 stop9h 48mHawaiian Airlines
Sat 11/17:38 amBWI - BOI
1 stop10h 39mHawaiian Airlines
Deal found 7/31$286
This SmartFares deal was found by Cheapflights users on 7/29. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/126:35 amBOI - IAD
1 stop8h 34mAlaska Airlines
Fri 9/196:09 pmIAD - BOI
1 stop7h 59mAlaska Airlines
Deal found 7/29$287
This Delta deal was found by Cheapflights users on 7/30. 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 8/275:30 amBOI - BWI
1 stop5h 57mDelta
Wed 9/37:20 amBWI - BOI
1 stop7h 15mDelta
Deal found 7/30$287
This Hawaiian Airlines deal was found by Cheapflights users on 7/29. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/121:40 pmGEG - IAD
1 stop7h 43mHawaiian Airlines
Mon 9/156:09 pmIAD - GEG
1 stop9h 10mHawaiian Airlines
Deal found 7/29$296

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 July 31, 2025.
Use the filters below to find and compare flights from Idaho to Washington, D.C. that are best for you.

Fly from

Idaho

Fly to

Washington, D.C.

Route

Depart

Return

Price

BoiseBaltimore

BOI - BWI

BOIBWI

Boise Air Term. Gowen Fld

Thu 8/21

6:06 pm-5:15 am

1 stop9h 09m

Baltimore/Washington

Mon 8/25

6:30 am-5:11 pm

1 stop12h 41m

$203

JacksonWashington, D.C.

JAC - IAD

JACIAD

Jackson Hole

Thu 9/25

7:44 am-4:50 pm

1 stop7h 06m

Washington, D.C. Dulles Intl

Mon 9/29

6:25 am-2:37 pm

1 stop10h 12m

$217

BoiseBaltimore

BOI - BWI

BOIBWI

Boise Air Term. Gowen Fld

Thu 8/21

12:33 pm-5:41 pm

1 stop27h 08m

Baltimore/Washington

Thu 8/28

8:09 am-5:11 pm

1 stop11h 02m

$251

JacksonWashington, D.C.

JAC - IAD

JACIAD

Jackson Hole

Wed 10/29

1:00 pm-11:33 pm

1 stop8h 33m

Washington, D.C. Dulles Intl

Wed 11/12

7:20 am-12:17 pm

1 stop6h 57m

$257

SpokaneBaltimore

GEG - BWI

GEGBWI

Spokane

Sun 9/7

9:06 pm-5:57 pm

1 stop17h 51m

Baltimore/Washington

Thu 9/11

5:45 am-8:16 pm

2 stops17h 31m

$259

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

Thu 9/18

12:22 pm-9:59 pm

1 stop7h 37m

Washington, D.C. Reagan-National

Wed 9/24

1:00 pm-11:37 am

1 stop24h 37m

$265

JacksonWashington, D.C.

JAC - IAD

JACIAD

Jackson Hole

Sat 12/20

2:30 pm-8:45 pm

Nonstop4h 15m

Washington, D.C. Dulles Intl

Sat 1/3

9:00 am-11:40 am

Nonstop4h 40m

$269

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Fri 9/5

11:53 am-9:59 pm

1 stop7h 06m

Washington, D.C. Reagan-National

Wed 9/10

1:00 pm-10:58 am

1 stop24h 58m

$275

BoiseBaltimore

BOI - BWI

BOIBWI

Boise Air Term. Gowen Fld

Wed 10/29

6:28 am-6:16 pm

1 stop9h 48m

Baltimore/Washington

Sat 11/1

7:38 am-4:17 pm

1 stop10h 39m

$286

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Fri 9/12

6:35 am-5:09 pm

1 stop8h 34m

Washington, D.C. Dulles Intl

Fri 9/19

6:09 pm-12:08 am

1 stop7h 59m

$287

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 60 results
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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, August is the cheapest month in which you can book a flight from Idaho to Washington, D.C. (average of $241). Flying from Idaho to Washington, D.C. in March is currently the most expensive (average of $290). 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 July 31, 2025.

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.

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 July 31, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest, and Delta from Idaho to Washington, D.C. to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Southwest
8.0
Very good
4,246 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,981 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Hawaiian Airlines
7.8
Good
2,611 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,900 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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 $93 on Spirit Airlines. Other airlines that offer cheap prices include American Airlines from $112 and Delta from $134 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 - Washington, D.C. Reagan-National or Spokane - 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, August is the cheapest month in which you can book a flight from Idaho to Washington, D.C. (average of $241). Flying from Idaho to Washington, D.C. in March is currently the most expensive (average of $290). 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
Woodbridge
Arlington
Alexandria
Tysons
Silver Spring
Fredericksburg
Gaithersburg
Towson
Linthicum Heights
Easton
Fairfax
Manassas
Falls Church
Waldorf
Laurel
Rockville
Oxon Hill
National Harbor
Dundalk
Bowie

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Idaho to Washington, D.C.

See prices for flight routes from nearby airports that may be better suited for you.
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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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$141Average$452FlexibilityNo cancel feeOn-time75%
DeltaCheapest$286Average$459FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$300Average$546FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$300Average$626FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$346Average$493FlexibilityNo cancel feeOn-time63%

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