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 $101 on Frontier. Other airlines that offer cheap prices include Alaska Airlines from $115 and Delta from $116 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, Boise Air Term. Gowen Fld - Washington, D.C. Reagan-National or Boise Air Term. Gowen Fld - Baltimore/Washington 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 22 days before your planned departure. Booking around this time can save you about 263% 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 $486 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.

$101+ Save on 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	FlightHub 3 stars
Round-trip from	$231 (American Airlines)
One-way from	$101 (Booking.com)
Popular in	March
Cheapest in	February
Average price	$361

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, 0% potential price rise

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Cheapest flight prices on average. 2% potential price decrease ($15 potential savings vs. average RT price).

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Average for round-trip flights in February 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 February 20, 2025.

Fri 4/111:23 pmBOI - IAD

1 stop7h 19mAmerican Airlines

Tue 4/156:18 amIAD - BOI

1 stop8h 15mAmerican Airlines

Deal found 2/18

$231

Fri 4/113:00 pmBOI - DCA

1 stop6h 51mDelta

Sat 4/197:30 amDCA - BOI

1 stop9h 00mDelta

Deal found 2/20

$231

Tue 4/152:15 pmBOI - BWI

1 stop8h 26mDelta

Tue 4/228:05 amBWI - BOI

1 stop7h 15mDelta

Deal found 2/20

$231

Mon 4/71:31 pmBOI - BWI

1 stop13h 54mSpirit Airlines

Thu 4/109:29 pmBWI - BOI

1 stop18h 10mSpirit Airlines

Deal found 2/20

$234

Fri 4/116:40 pmBOI - IAD

1 stop9h 00mAlaska Airlines

Wed 4/167:00 amIAD - BOI

1 stop8h 52mAlaska Airlines

Deal found 2/20

$251

Fri 4/116:40 pmBOI - IAD

1 stop9h 00mHawaiian Airlines

Sat 4/197:00 amIAD - BOI

1 stop9h 55mHawaiian Airlines

Deal found 2/20

$265

Wed 4/231:23 pmBOI - DCA

1 stop9h 32mAmerican Airlines

Sat 5/35:00 amDCA - BOI

1 stop9h 33mAmerican Airlines

Deal found 2/19

$266

Tue 4/227:00 pmBOI - IAD

1 stop8h 15mUnited Airlines

Wed 4/235:30 pmIAD - BOI

1 stop7h 33mUnited Airlines

Deal found 2/20

$278

Wed 4/161:29 pmGEG - IAD

1 stop13h 05mAlaska Airlines

Sun 4/207:31 amIAD - GEG

1 stop18h 31mAlaska Airlines

Deal found 2/20

$296

Wed 4/166:30 amGEG - DCA

1 stop11h 29mAlaska Airlines

Sat 4/196:58 pmDCA - GEG

1 stop18h 11mAlaska Airlines

Deal found 2/20

$296

Wed 4/301:15 pmGEG - IAD

1 stop7h 16mDelta

Mon 5/57:25 amIAD - GEG

1 stop10h 28mDelta

Deal found 2/19

$297

Fri 3/2112:50 pmGEG - DCA

1 stop6h 44mDelta

Fri 3/286:00 amDCA - GEG

1 stop8h 55mDelta

Deal found 2/20

$297

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 February 20, 2025.

Fri 4/111:23 pmBOI - IAD

1 stop7h 19mAmerican Airlines

Tue 4/156:18 amIAD - BOI

1 stop8h 15mAmerican Airlines

Deal found 2/18

$231

Fri 4/113:00 pmBOI - DCA

1 stop6h 51mDelta

Sat 4/197:30 amDCA - BOI

1 stop9h 00mDelta

Deal found 2/20

$231

Mon 4/71:31 pmBOI - BWI

1 stop13h 54mSpirit Airlines

Thu 4/109:29 pmBWI - BOI

1 stop18h 10mSpirit Airlines

Deal found 2/20

$234

Fri 4/116:40 pmBOI - IAD

1 stop9h 00mAlaska Airlines

Wed 4/167:00 amIAD - BOI

1 stop8h 52mAlaska Airlines

Deal found 2/20

$251

Fri 4/116:40 pmBOI - IAD

1 stop9h 00mHawaiian Airlines

Sat 4/197:00 amIAD - BOI

1 stop9h 55mHawaiian Airlines

Deal found 2/20

$265

Tue 4/227:00 pmBOI - IAD

1 stop8h 15mUnited Airlines

Wed 4/235:30 pmIAD - BOI

1 stop7h 33mUnited Airlines

Deal found 2/20

$278

Sun 4/209:35 amGEG - BWI

2 stops22h 49mMultiple Airlines

Wed 4/239:29 pmBWI - GEG

1 stop25h 54mMultiple Airlines

Deal found 2/19

$342

Wed 4/3012:55 pmGEG - BWI

1 stop7h 10mSouthwest

Mon 5/56:45 amBWI - GEG

2 stops12h 35mSouthwest

Deal found 2/18

$343

Tue 4/152:15 pmBOI - BWI

1 stop8h 26mDelta

Tue 4/228:05 amBWI - BOI

1 stop7h 15mDelta

Deal found 2/20

$231

Wed 4/231:23 pmBOI - DCA

1 stop9h 32mAmerican Airlines

Sat 5/35:00 amDCA - BOI

1 stop9h 33mAmerican Airlines

Deal found 2/19

$266

Wed 4/161:29 pmGEG - IAD

1 stop13h 05mAlaska Airlines

Sun 4/207:31 amIAD - GEG

1 stop18h 31mAlaska Airlines

Deal found 2/20

$296

Sat 3/296:30 pmGEG - IAD

1 stop7h 46mUnited Airlines

Wed 4/28:15 amIAD - GEG

1 stop9h 21mUnited Airlines

Deal found 2/19

$298

Last-minute flights from Idaho to Washington, D.C.
Discover last-minute flight deals from Idaho to Washington, D.C.. Data last updated February 20, 2025 and is based on user searches.

Wed 2/263:38 pmGEG - BWI

1 stop23h 18mAlaska Airlines

Sun 3/26:56 pmBWI - GEG

1 stop7h 48mAlaska Airlines

Deal found 2/19

$827

Wed 2/265:00 amGEG - IAD

1 stop9h 48mAlaska Airlines

Sun 3/26:48 pmIAD - GEG

1 stop7h 56mAlaska Airlines

Deal found 2/19

$832

Wed 2/261:15 pmGEG - IAD

1 stop7h 19mDelta

Sun 3/24:23 pmIAD - GEG

1 stop9h 29mDelta

Deal found 2/19

$833

Wed 2/267:50 amGEG - BWI

2 stops10h 45mSouthwest

Sun 3/24:25 pmBWI - GEG

1 stop9h 40mSouthwest

Deal found 2/19

$833

Thu 2/277:44 pmGEG - IAD

2 stops13h 50mMultiple Airlines

Sun 3/26:00 amIAD - GEG

2 stops38h 39mMultiple Airlines

Deal found 2/19

$689

Sun 3/27:41 pmBOI - BWI

1 stop7h 37mSpirit Airlines

Wed 3/55:45 amBWI - BOI

1 stop8h 47mSpirit Airlines

Deal found 2/20

$540

Sun 3/28:15 amBOI - DCA

1 stop10h 44mAlaska Airlines

Wed 3/59:00 amDCA - BOI

1 stop15h 59mAlaska Airlines

Deal found 2/20

$586

Sun 3/29:25 amBOI - DCA

2 stops12h 18mDelta

Wed 3/56:00 amDCA - BOI

2 stops10h 05mDelta

Deal found 2/20

$667

Sun 3/26:00 amBOI - IAD

1 stop9h 05mSouthwest

Wed 3/53:55 pmIAD - BOI

1 stop8h 45mSouthwest

Deal found 2/19

$687

Sun 3/25:30 amBOI - DCA

2 stops8h 40mSouthwest

Wed 3/51:35 pmDCA - BOI

2 stops11h 10mSouthwest

Deal found 2/19

$697

Sun 3/210:53 amBOI - DCA

1 stop8h 05mUnited Airlines

Wed 3/52:00 pmDCA - BOI

1 stop10h 45mUnited Airlines

Deal found 2/19

$737

Sun 3/21:50 pmBOI - IAD

2 stops13h 42mAlaska Airlines

Wed 3/55:18 pmIAD - BOI

2 stops21h 42mAlaska Airlines

Deal found 2/19

$742

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 February 20, 2025.

Thu 5/2211:54 amGEG - BWI

1 stop25h 31mFrontier

Deal found 2/19

$101

Tue 4/159:00 amBOI - DCA

1 stop10h 55mAlaska Airlines

Deal found 2/19

$115

Sun 4/63:00 pmBOI - DCA

1 stop6h 51mDelta

Deal found 2/19

$116

Tue 4/156:52 pmBOI - IAD

1 stop8h 42mAlaska Airlines

Deal found 2/19

$136

Thu 6/1212:36 pmBOI - DCA

1 stop7h 23mFrontier

Deal found 2/19

$142

Tue 4/85:48 pmGEG - IAD

1 stop8h 46mHawaiian Airlines

Deal found 2/20

$148

Wed 4/96:30 amGEG - DCA

1 stop11h 29mHawaiian Airlines

Deal found 2/20

$148

Wed 4/235:49 pmGEG - BWI

1 stop8h 57mAlaska Airlines

Deal found 2/20

$148

Tue 3/257:24 pmGEG - IAD

1 stop7h 55mDelta

Deal found 2/20

$149

Sat 5/31:40 pmGEG - BWI

1 stop6h 37mUnited Airlines

Deal found 2/20

$149

Tue 3/187:15 pmBOI - IAD

1 stop9h 04mDelta

Deal found 2/19

$151

Sat 5/171:32 pmBOI - DCA

1 stop9h 14mAmerican Airlines

Deal found 2/19

$151

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

Fly from

Fly to

Route

Depart

Return

Price

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Fri 4/11

1:23 pm-10:42 pm

1 stop7h 19m

Washington, D.C. Dulles Intl

Tue 4/15

6:18 am-12:33 pm

1 stop8h 15m

$231

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

Fri 4/11

3:00 pm-11:51 pm

1 stop6h 51m

Washington, D.C. Reagan-National

Sat 4/19

7:30 am-2:30 pm

1 stop9h 00m

$231

BoiseBaltimore

BOI - BWI

BOIBWI

Boise Air Term. Gowen Fld

Tue 4/15

2:15 pm-12:41 am

1 stop8h 26m

Baltimore/Washington

Tue 4/22

8:05 am-1:20 pm

1 stop7h 15m

$231

BoiseBaltimore

BOI - BWI

BOIBWI

Boise Air Term. Gowen Fld

Mon 4/7

1:31 pm-5:25 am

1 stop13h 54m

Baltimore/Washington

Thu 4/10

9:29 pm-1:39 pm

1 stop18h 10m

$234

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Fri 4/11

6:40 pm-5:40 am

1 stop9h 00m

Washington, D.C. Dulles Intl

Wed 4/16

7:00 am-1:52 pm

1 stop8h 52m

$251

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Fri 4/11

6:40 pm-5:40 am

1 stop9h 00m

Washington, D.C. Dulles Intl

Sat 4/19

7:00 am-2:55 pm

1 stop9h 55m

$265

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

Wed 4/23

1:23 pm-12:55 am

1 stop9h 32m

Washington, D.C. Reagan-National

Sat 5/3

5:00 am-12:33 pm

1 stop9h 33m

$266

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Tue 4/22

7:00 pm-5:15 am

1 stop8h 15m

Washington, D.C. Dulles Intl

Wed 4/23

5:30 pm-11:03 pm

1 stop7h 33m

$278

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Wed 4/16

1:29 pm-5:34 am

1 stop13h 05m

Washington, D.C. Dulles Intl

Sun 4/20

7:31 am-11:02 pm

1 stop18h 31m

$296

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Wed 4/16

6:30 am-8:59 pm

1 stop11h 29m

Washington, D.C. Reagan-National

Sat 4/19

6:58 pm-10:09 am

1 stop18h 11m

$296

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

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.

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, 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 $389). 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 Southwest, Alaska Airlines 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.

Southwest

8.1

Very good

4,411 reviews

Reviews

1 / 20

2.0

Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Southwest

8.1

Very good

4,411 reviews

Southwest

8.1

Very good

4,411 reviews

Reviews

1 / 20

2.0

Mediocre

Anonymous,Feb 2025

MCO - STL

Alaska Airlines

8.0

Very good

9,692 reviews

Southwest

8.1

Very good

4,411 reviews

Reviews

1 / 20

2.0

Mediocre

Anonymous,Feb 2025

MCO - STL

Delta

8.0

Very good

8,220 reviews

Southwest

8.1

Very good

4,411 reviews

Reviews

1 / 20

2.0

Mediocre

Anonymous,Feb 2025

MCO - STL

Hawaiian Airlines

7.9

Good

2,317 reviews

Southwest

8.1

Very good

4,411 reviews

Reviews

1 / 20

2.0

Mediocre

Anonymous,Feb 2025

MCO - STL

United Airlines

7.4

Good

8,766 reviews

Southwest

8.1

Very good

4,411 reviews

Reviews

1 / 20

2.0

Mediocre

Anonymous,Feb 2025

MCO - STL

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 $101 on Frontier. Other airlines that offer cheap prices include Alaska Airlines from $115 and Delta from $116 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, Boise Air Term. Gowen Fld - Washington, D.C. Reagan-National 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, 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 $389). 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

Fairfax

Springfield

Rockville

Tysons

Gaithersburg

Silver Spring

Fredericksburg

Linthicum Heights

Laurel

Falls Church

Woodbridge

Easton

Herndon

Bowie

Reston

National Harbor

Oxon Hill

Gettysburg

Browse thousands of different options on Cheapflights for your next trip

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

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$141	Average$253	FlexibilityNo cancel fee	On-time65%
Alaska Airlines	Cheapest$300	Average$568	FlexibilityNo cancel fee	On-time75%
United Airlines	Cheapest$316	Average$698	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$316	Average$510	FlexibilityNo cancel fee	On-timeN/A
Southwest	Cheapest$321	Average$533	FlexibilityNo cancel fee	On-time63%
American Airlines	Cheapest$359	Average$615	FlexibilityNo cancel fee	On-time71%

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$101+ 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 5/22. 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

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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 February 20, 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 February 20, 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 February 20, 2025.

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

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.

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.?

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 February 20, 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 Southwest, Alaska Airlines 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 6 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 February 20, 2025.