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 $89 on Frontier. Other airlines that offer cheap prices include Alaska Airlines from $135 and Spirit Airlines from $139 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 Spokane - Washington, D.C. Reagan-National as they are the most popular.

What are the most popular airlines that fly from Idaho to Washington, D.C.?

Alaska Airlines, Delta and United Airlines are the most popular airlines when flying from Idaho to Washington, D.C..

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

To save on the cost of your flight from Idaho to Washington, D.C., book at least 38 days before your planned departure. Booking around this time can save you about 169% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $506 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $1,051.

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

Our data shows that February tends to be the cheapest month to fly to Washington, D.C. from Idaho. Users have commonly found prices around $468 for the month, but tickets can be as low as $300. Due to multiple factors, prepare for potentially higher prices in March.

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.

$89+ Flights from Idaho to Washington, D.C.

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

Most accurate provider	FlightHub 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$218 (Booking.com)
One-way from	$89 (Frontier)
Popular in	March
Cheapest in	February
Average price	$374

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)

Search Deals

High demand for flights, 6% potential price rise

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 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 April 25, 2025.

Sat 5/102:41 pmBOI - IAD

1 stop7h 17mAlaska Airlines

Wed 5/146:30 amIAD - BOI

1 stop7h 46mAlaska Airlines

Deal found 4/25

$279

Tue 9/26:05 pmBOI - BWI

1 stop9h 05mSouthwest

Tue 9/236:10 amBWI - BOI

1 stop6h 25mSouthwest

Deal found 4/24

$287

Sun 5/187:26 pmGEG - IAD

1 stop9h 10mHawaiian Airlines

Sat 5/245:14 pmIAD - GEG

1 stop9h 33mHawaiian Airlines

Deal found 4/24

$296

Wed 5/219:30 amGEG - DCA

1 stop9h 29mAlaska Airlines

Sun 5/258:59 amDCA - GEG

1 stop16h 23mAlaska Airlines

Deal found 4/24

$296

Fri 6/612:16 pmBOI - BWI

1 stop15h 54mMultiple Airlines

Wed 6/115:20 pmBWI - BOI

1 stop20h 27mMultiple Airlines

Deal found 4/24

$296

Tue 5/277:25 pmGEG - IAD

1 stop7h 27mDelta

Fri 5/307:45 amIAD - GEG

1 stop10h 05mDelta

Deal found 4/25

$297

Wed 5/282:10 pmGEG - DCA

1 stop6h 16mDelta

Mon 6/96:10 amDCA - GEG

1 stop7h 26mDelta

Deal found 4/23

$297

Fri 5/237:49 pmBOI - IAD

1 stop8h 03mDelta

Tue 5/277:45 amIAD - BOI

1 stop10h 34mDelta

Deal found 4/24

$301

Fri 6/611:59 pmBOI - DCA

1 stop8h 57mDelta

Tue 6/104:40 pmDCA - BOI

1 stop9h 10mDelta

Deal found 4/23

$301

Wed 5/282:38 pmBOI - IAD

1 stop6h 12mUnited Airlines

Sat 5/318:15 amIAD - BOI

1 stop9h 39mUnited Airlines

Deal found 4/25

$312

Thu 6/57:18 pmBOI - BWI

1 stop8h 22mDelta

Sat 6/75:40 amBWI - BOI

1 stop8h 28mDelta

Deal found 4/24

$315

Wed 11/129:50 amBOI - DCA

1 stop10h 05mAlaska Airlines

Wed 11/198:00 amDCA - BOI

1 stop10h 20mAlaska Airlines

Deal found 4/24

$323

Best flights from Idaho to Washington, D.C.
Discover carefully curated flight deals from Idaho to Washington, D.C. that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 25, 2025.

Thu 6/511:48 amGEG - BWI

1 stop25h 37mFrontier

Wed 6/115:20 pmBWI - GEG

1 stop20h 43mFrontier

Deal found 4/23

$218

Sat 5/102:41 pmBOI - IAD

1 stop7h 17mAlaska Airlines

Wed 5/146:30 amIAD - BOI

1 stop7h 46mAlaska Airlines

Deal found 4/25

$279

Sun 5/187:26 pmGEG - IAD

1 stop9h 10mHawaiian Airlines

Sat 5/245:14 pmIAD - GEG

1 stop9h 33mHawaiian Airlines

Deal found 4/24

$296

Fri 6/612:16 pmBOI - BWI

1 stop15h 54mMultiple Airlines

Wed 6/115:20 pmBWI - BOI

1 stop20h 27mMultiple Airlines

Deal found 4/24

$296

Tue 5/277:25 pmGEG - IAD

1 stop7h 27mDelta

Fri 5/307:45 amIAD - GEG

1 stop10h 05mDelta

Deal found 4/25

$297

Wed 5/282:38 pmBOI - IAD

1 stop6h 12mUnited Airlines

Sat 5/318:15 amIAD - BOI

1 stop9h 39mUnited Airlines

Deal found 4/25

$312

Fri 6/131:15 pmBOI - DCA

1 stop8h 31mAmerican Airlines

Wed 6/185:08 amDCA - BOI

1 stop7h 48mAmerican Airlines

Deal found 4/24

$330

Fri 6/65:00 amBOI - BWI

2 stops9h 05mSouthwest

Tue 6/106:55 pmBWI - BOI

1 stop7h 45mSouthwest

Deal found 4/23

$367

Thu 6/55:05 pmGEG - BWI

1 stop15h 18mSun Country Air

Thu 6/1212:25 pmBWI - GEG

1 stop6h 40mSun Country Air

Deal found 4/23

$400

Mon 5/51:52 pmBOI - BWI

3 stops21h 55mSpirit Airlines

Thu 5/88:10 amBWI - BOI

2 stops29h 11mSpirit Airlines

Deal found 4/25

$493

Wed 5/219:30 amGEG - DCA

1 stop9h 29mAlaska Airlines

Sun 5/258:59 amDCA - GEG

1 stop16h 23mAlaska Airlines

Deal found 4/24

$296

Wed 5/282:10 pmGEG - DCA

1 stop6h 16mDelta

Mon 6/96:10 amDCA - GEG

1 stop7h 26mDelta

Deal found 4/23

$297

Last-minute flights from Idaho to Washington, D.C.
Discover last-minute flight deals from Idaho to Washington, D.C.. Data last updated April 25, 2025 and is based on user searches.

Wed 4/304:15 pmJAC - IAD

1 stop17h 10mUnited Airlines

Sat 5/1010:25 pmIAD - JAC

1 stop13h 14mUnited Airlines

Deal found 4/23

$655

Wed 4/301:23 pmJAC - IAD

1 stop8h 08mDelta

Wed 5/712:39 pmIAD - JAC

2 stops10h 09mDelta

Deal found 4/23

$660

Wed 4/3010:40 amJAC - BWI

1 stop10h 50mUnited Airlines

Wed 5/78:23 amBWI - JAC

1 stop6h 53mUnited Airlines

Deal found 4/23

$673

Sat 5/35:35 amGEG - IAD

1 stop6h 40mSouthwest

Sun 5/45:15 amIAD - GEG

1 stop7h 20mSouthwest

Deal found 4/25

$397

Sun 5/43:25 pmGEG - IAD

1 stop10h 58mUnited Airlines

Mon 5/58:35 amIAD - GEG

2 stops15h 15mUnited Airlines

Deal found 4/25

$578

Mon 5/51:52 pmBOI - BWI

3 stops33h 07mMultiple Airlines

Fri 5/97:17 amBWI - BOI

2 stops32h 04mMultiple Airlines

Deal found 4/23

$481

Mon 5/51:52 pmBOI - BWI

3 stops21h 55mSpirit Airlines

Thu 5/88:10 amBWI - BOI

2 stops29h 11mSpirit Airlines

Deal found 4/25

$493

Mon 5/56:52 amBOI - BWI

2 stops13h 23mAmerican Airlines

Fri 5/93:29 pmBWI - BOI

1 stop8h 31mAmerican Airlines

Deal found 4/25

$568

Mon 5/51:10 pmIDA - IAD

1 stop8h 21mDelta

Wed 5/77:30 amIAD - IDA

1 stop6h 20mDelta

Deal found 4/25

$611

Mon 5/51:52 pmBOI - IAD

3 stops19h 34mMultiple Airlines

Thu 5/812:49 pmIAD - BOI

2 stops24h 32mMultiple Airlines

Deal found 4/25

$640

Mon 5/55:30 amBOI - BWI

1 stop7h 13mDelta

Fri 5/97:02 pmBWI - BOI

1 stop7h 20mDelta

Deal found 4/25

$687

Mon 5/55:40 pmBOI - IAD

2 stops12h 03mAlaska Airlines

Fri 5/95:38 pmIAD - BOI

1 stop21h 04mAlaska Airlines

Deal found 4/25

$688

One-way flights from Idaho to Washington, D.C.
Search for one-way flight options from Idaho to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated April 25, 2025.

Tue 5/2012:26 pmGEG - DCA

1 stop6h 33mFrontier

Deal found 4/24

$89

Fri 5/306:03 pmGEG - BWI

1 stop22h 36mMultiple Airlines

Deal found 4/25

$113

Thu 5/2911:49 amGEG - BWI

1 stop25h 39mFrontier

Deal found 4/25

$120

Tue 5/271:40 pmGEG - IAD

1 stop7h 19mAlaska Airlines

Deal found 4/24

$135

Fri 6/612:16 pmBOI - BWI

1 stop15h 54mSpirit Airlines

Deal found 4/23

$139

Sat 6/712:50 pmBOI - BWI

1 stop8h 46mDelta

Deal found 4/24

$144

Tue 5/206:00 amGEG - IAD

1 stop8h 15mHawaiian Airlines

Deal found 4/24

$148

Sat 5/2410:45 amGEG - DCA

1 stop8h 14mHawaiian Airlines

Deal found 4/24

$148

Sat 6/141:00 pmGEG - IAD

1 stop7h 43mDelta

Deal found 4/25

$149

Fri 7/46:50 amGEG - DCA

1 stop8h 08mDelta

Deal found 4/24

$149

Tue 5/2012:39 pmGEG - BWI

1 stop7h 06mDelta

Deal found 4/25

$149

Thu 6/127:45 pmBOI - IAD

1 stop8h 14mDelta

Deal found 4/25

$151

Cheapflights Fare Finder

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

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Sat 5/10

2:41 pm-11:58 pm

1 stop7h 17m

Washington, D.C. Dulles Intl

Wed 5/14

6:30 am-12:16 pm

1 stop7h 46m

$279

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Sun 5/18

7:26 pm-7:36 am

1 stop9h 10m

Washington, D.C. Dulles Intl

Sat 5/24

5:14 pm-11:47 pm

1 stop9h 33m

$296

BoiseBaltimore

BOI - BWI

BOIBWI

Boise Air Term. Gowen Fld

Fri 6/6

12:16 pm-6:10 am

1 stop15h 54m

Baltimore/Washington

Wed 6/11

5:20 pm-11:47 am

1 stop20h 27m

$296

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Wed 5/21

9:30 am-9:59 pm

1 stop9h 29m

Washington, D.C. Reagan-National

Sun 5/25

8:59 am-10:22 pm

1 stop16h 23m

$296

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Tue 5/27

7:25 pm-5:52 am

1 stop7h 27m

Washington, D.C. Dulles Intl

Fri 5/30

7:45 am-2:50 pm

1 stop10h 05m

$297

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Wed 5/28

2:10 pm-11:26 pm

1 stop6h 16m

Washington, D.C. Reagan-National

Mon 6/9

6:10 am-10:36 am

1 stop7h 26m

$297

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Fri 5/23

7:49 pm-5:52 am

1 stop8h 03m

Washington, D.C. Dulles Intl

Tue 5/27

7:45 am-4:19 pm

1 stop10h 34m

$301

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

Fri 6/6

11:59 pm-10:56 am

1 stop8h 57m

Washington, D.C. Reagan-National

Tue 6/10

4:40 pm-11:50 pm

1 stop9h 10m

$301

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Wed 5/28

2:38 pm-10:50 pm

1 stop6h 12m

Washington, D.C. Dulles Intl

Sat 5/31

8:15 am-3:54 pm

1 stop9h 39m

$312

BoiseBaltimore

BOI - BWI

BOIBWI

Boise Air Term. Gowen Fld

Thu 6/5

7:18 pm-5:40 am

1 stop8h 22m

Baltimore/Washington

Sat 6/7

5:40 am-12:08 pm

1 stop8h 28m

$315

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/24

Showing 1-10 of 60 results

...

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 $309). Flying from Idaho to Washington, D.C. in June is currently the most expensive (average of $383). 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?

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

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

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.

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. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

9,928 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Alaska Airlines

8.0

Very good

9,928 reviews

Alaska Airlines

8.0

Very good

9,928 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Southwest

8.0

Very good

4,287 reviews

Alaska Airlines

8.0

Very good

9,928 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Delta

8.0

Very good

7,920 reviews

Alaska Airlines

8.0

Very good

9,928 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Hawaiian Airlines

7.9

Good

2,395 reviews

Alaska Airlines

8.0

Very good

9,928 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

United Airlines

7.4

Good

8,685 reviews

Alaska Airlines

8.0

Very good

9,928 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Related info for your journey

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 $89 on Frontier. Other airlines that offer cheap prices include Alaska Airlines from $135 and Spirit Airlines from $139 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 Spokane - 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, August is the cheapest month in which you can book a flight from Idaho to Washington, D.C. (average of $309). Flying from Idaho to Washington, D.C. in June is currently the most expensive (average of $383). 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

Arlington

Alexandria

Woodbridge

Fairfax

Tysons

Springfield

Rockville

Fredericksburg

Gaithersburg

Silver Spring

Linthicum Heights

Falls Church

Laurel

Easton

Herndon

Bowie

Towson

National Harbor

Oxon Hill

Reston

Browse thousands of different options on Cheapflights for your next trip

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

Airline	Cheapest	Average	Flexibility	On-time
Alaska Airlines	Cheapest$141	Average$489	FlexibilityNo cancel fee	On-time75%
United Airlines	Cheapest$300	Average$676	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$306	Average$465	FlexibilityNo cancel fee	On-timeN/A
Southwest	Cheapest$346	Average$482	FlexibilityNo cancel fee	On-time63%
American Airlines	Cheapest$359	Average$627	FlexibilityNo cancel fee	On-time71%

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$89+ 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 5/20. Fares are subject to change and may not be available on all flights or dates of travel.

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

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

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 April 25, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

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 April 25, 2025.

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 April 25, 2025.

Cheapflights Fare Finder

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

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.

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.?

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 April 25, 2025.

Rainfall in Washington, D.C. by month

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

Temperature in Washington, D.C. by month

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

Reviews of airlines servicing Washington, D.C.

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. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

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?

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

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

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

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

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

Traveling to a place near Idaho?

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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.

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

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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 April 25, 2025.