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Washington, D.C.

$83+ 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 11/16. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — WAS
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
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 October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$131
(Frontier)

One-way from

$83
(Booking.com)

Popular in

March

Cheapest in

August

Average price

$373
Provider with most accurate pricing for Boise Air Term. Gowen Fld-Washington, D.C. (WAS) flight deals.
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Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-Washington, D.C. (WAS) flights.
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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. 2% potential increase in price ($11 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 October 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 October 30, 2025.

This Frontier deal was found by Cheapflights users on 10/29. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/412:08 pmGEG - DCA
1 stop6h 51mFrontier
Wed 12/106:00 pmDCA - GEG
1 stop20h 13mFrontier
Deal found 10/29$131
This Gotogate deal was found by Cheapflights users on 10/29. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1312:03 pmGEG - DCA
1 stop6h 56mFrontier
Sat 11/156:00 pmDCA - GEG
1 stop20h 08mFrontier
Deal found 10/29$140
This Mytrip deal was found by Cheapflights users on 10/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/712:44 pmBOI - DCA
1 stop22h 22mFrontier
Wed 12/106:00 pmDCA - BOI
1 stop19h 49mFrontier
Deal found 10/30$143
This Delta deal was found by Cheapflights users on 10/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/411:19 amGEG - BWI
2 stops10h 02mDelta
Wed 12/107:15 amBWI - GEG
2 stops10h 40mDelta
Deal found 10/29$256
This KAYAK deal was found by Cheapflights users on 10/30. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/55:51 amGEG - DCA
1 stop7h 17mAlaska Airlines
Mon 12/85:00 pmDCA - GEG
1 stop9h 14mAlaska Airlines
Deal found 10/30$284
This Kiwi.com deal was found by Cheapflights users on 10/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/79:17 pmBOI - DCA
2 stops22h 42mMultiple Airlines
Wed 12/101:00 pmDCA - BOI
1 stop24h 49mMultiple Airlines
Deal found 10/30$285
This Delta deal was found by Cheapflights users on 10/28. 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 11/271:16 pmGEG - BWI
1 stop8h 10mDelta
Thu 12/41:52 pmBWI - GEG
2 stops13h 19mDelta
Deal found 10/28$292
This Alaska Airlines deal was found by Cheapflights users on 10/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/275:30 amGEG - IAD
1 stop9h 04mAlaska Airlines
Thu 12/47:34 amIAD - GEG
1 stop16h 54mAlaska Airlines
Deal found 10/30$304
This Delta deal was found by Cheapflights users on 10/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/271:10 pmGEG - IAD
1 stop8h 15mDelta
Thu 12/47:15 amIAD - GEG
1 stop8h 15mDelta
Deal found 10/29$305
This Alaska Airlines deal was found by Cheapflights users on 10/29. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/275:30 amGEG - BWI
1 stop9h 38mAlaska Airlines
Thu 12/47:16 pmBWI - GEG
1 stop8h 08mAlaska Airlines
Deal found 10/29$312
This Delta deal was found by Cheapflights users on 10/30. 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.
Fri 12/127:45 pmBOI - BWI
2 stops12h 17mDelta
Mon 12/1511:39 amBWI - BOI
2 stops12h 37mDelta
Deal found 10/30$314
This American Airlines deal was found by Cheapflights users on 10/28. 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 11/131:11 pmJAC - IAD
1 stop7h 21mAmerican Airlines
Tue 11/256:04 amIAD - JAC
1 stop8h 10mAmerican Airlines
Deal found 10/28$319

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 October 30, 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

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Thu 11/13

12:03 pm-4:56 pm

1 stop25h 53m

Washington, D.C. Reagan-National

Sat 11/15

6:00 pm-11:08 am

1 stop20h 08m

$141

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

Sun 12/7

12:44 pm-1:06 pm

1 stop22h 22m

Washington, D.C. Reagan-National

Wed 12/10

6:00 pm-11:49 am

1 stop19h 49m

$143

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

Mon 2/2

10:10 am-9:59 pm

2 stops33h 49m

Washington, D.C. Reagan-National

Sat 2/7

2:00 pm-11:59 am

1 stop23h 59m

$221

SpokaneBaltimore

GEG - BWI

GEGBWI

Spokane

Thu 12/4

11:19 am-12:21 am

2 stops10h 02m

Baltimore/Washington

Wed 12/10

7:15 am-2:55 pm

2 stops10h 40m

$256

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Fri 12/5

5:51 am-4:08 pm

1 stop7h 17m

Washington, D.C. Reagan-National

Mon 12/8

5:00 pm-11:14 pm

1 stop9h 14m

$284

SpokaneBaltimore

GEG - BWI

GEGBWI

Spokane

Thu 11/27

1:16 pm-12:26 am

1 stop8h 10m

Baltimore/Washington

Thu 12/4

6:00 am-2:55 pm

2 stops11h 55m

$302

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Thu 12/4

7:47 pm-4:36 pm

1 stop17h 49m

Washington, D.C. Dulles Intl

Wed 12/10

7:34 am-12:39 pm

1 stop8h 05m

$304

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Thu 11/27

5:30 am-5:34 pm

1 stop9h 04m

Washington, D.C. Dulles Intl

Thu 12/4

7:34 am-9:28 pm

1 stop16h 54m

$304

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Thu 11/27

1:10 pm-12:25 am

1 stop8h 15m

Washington, D.C. Dulles Intl

Thu 12/4

7:15 am-12:30 pm

1 stop8h 15m

$305

SpokaneBaltimore

GEG - BWI

GEGBWI

Spokane

Wed 12/3

11:19 am-12:22 am

2 stops10h 03m

Baltimore/Washington

Sun 12/7

6:00 am-12:29 pm

2 stops9h 29m

$306

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

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, April is the cheapest month in which you can book a flight from Idaho to Washington, D.C. (average of $141). Flying from Idaho to Washington, D.C. in December 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 October 30, 2025.

It’s optimal to fly from Idaho to Washington, D.C. in the evening. By choosing this option you can save up to 32% on the cost of your flight, compared to a flight in the morning.

What is the cheapest day to fly from Idaho to Washington, D.C.?

Use this chart to determine the cheapest time to fly round-trip from Idaho to Washington, D.C.. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Idaho to Washington, D.C. flight should consider departing on Monday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 Frontier, Delta, and Alaska Airlines fly from Idaho to Washington, D.C. in about 7h 17m. The time it takes to get you to your destination can typically vary by up to 18h 36m. There are 2099 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 $83 on Frontier. Other airlines that offer cheap prices include Delta from $125 and Alaska Airlines from $154 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 Boise Air Term. Gowen Fld - Washington, D.C. Dulles Intl, Spokane - 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, April is the cheapest month in which you can book a flight from Idaho to Washington, D.C. (average of $141). Flying from Idaho to Washington, D.C. in December 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

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

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
Woodbridge
Tysons
Arlington
Springfield
Hanover
Silver Spring
Fairfax
Fredericksburg
Falls Church
Owings Mills
Linthicum Heights
Manassas
Largo
Oxon Hill
Laurel
Towson
National Harbor
Waldorf
Bowie

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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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$141Average$356FlexibilityNo cancel feeOn-time75%
DeltaCheapest$249Average$435FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$278Average$588FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$300Average$546FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$351Average$494FlexibilityNo cancel feeOn-time63%

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