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 $99 on Frontier. Other airlines that offer cheap prices include Alaska Airlines from $135 and Delta from $144 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. Reagan-National, Boise Air Term. Gowen Fld - Washington, D.C. Dulles Intl or Spokane - Washington, D.C. Dulles Intl 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 $469 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.

$94+ 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	$212 (Alaska Airlines)
One-way from	$94 (Mytrip)
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, 7% potential price rise

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Cheapest flight prices on average. 1% potential price decrease ($10 potential savings vs. average RT price).

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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 30, 2025.

Wed 9/35:45 pmBOI - BWI

1 stop9h 48mAlaska Airlines

Wed 9/107:00 amBWI - BOI

1 stop10h 00mAlaska Airlines

Deal found 4/28

$212

Sun 6/111:48 amGEG - BWI

1 stop25h 37mFrontier

Sat 6/75:20 pmBWI - GEG

1 stop20h 43mFrontier

Deal found 4/29

$228

Fri 5/2312:16 pmBOI - BWI

1 stop15h 54mMultiple Airlines

Wed 5/285:23 pmBWI - BOI

1 stop20h 28mMultiple Airlines

Deal found 4/28

$246

Fri 5/236:03 pmGEG - BWI

1 stop22h 36mMultiple Airlines

Mon 5/266:20 amBWI - GEG

2 stops13h 53mMultiple Airlines

Deal found 4/29

$277

Sat 8/96:00 pmBOI - IAD

1 stop10h 50mAlaska Airlines

Sat 8/166:30 amIAD - BOI

1 stop10h 34mAlaska Airlines

Deal found 4/28

$279

Tue 7/111:40 pmBOI - BWI

1 stop9h 12mDelta

Tue 7/87:18 pmBWI - BOI

1 stop6h 41mDelta

Deal found 4/28

$287

Wed 5/211:40 pmGEG - IAD

1 stop7h 19mHawaiian Airlines

Sun 5/256:30 amIAD - GEG

1 stop9h 15mHawaiian Airlines

Deal found 4/28

$296

Wed 5/2111:33 amGEG - DCA

1 stop7h 26mAlaska Airlines

Sun 5/259:59 amDCA - GEG

1 stop16h 48mAlaska Airlines

Deal found 4/28

$296

Tue 9/25:46 pmGEG - BWI

1 stop8h 47mAlaska Airlines

Sat 9/67:22 pmBWI - GEG

1 stop7h 37mAlaska Airlines

Deal found 4/29

$296

Wed 6/116:00 amGEG - IAD

1 stop8h 35mAmerican Airlines

Tue 6/176:27 amIAD - GEG

1 stop8h 18mAmerican Airlines

Deal found 4/27

$297

Wed 5/212:10 pmGEG - DCA

1 stop6h 16mDelta

Sun 5/257:50 amDCA - GEG

1 stop7h 56mDelta

Deal found 4/28

$297

Wed 5/214:56 pmGEG - BWI

1 stop9h 44mDelta

Sun 5/256:15 amBWI - GEG

1 stop9h 31mDelta

Deal found 4/29

$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 April 30, 2025.

Wed 9/35:45 pmBOI - BWI

1 stop9h 48mAlaska Airlines

Wed 9/107:00 amBWI - BOI

1 stop10h 00mAlaska Airlines

Deal found 4/28

$212

Sun 6/111:48 amGEG - BWI

1 stop25h 37mFrontier

Sat 6/75:20 pmBWI - GEG

1 stop20h 43mFrontier

Deal found 4/29

$228

Fri 5/2312:16 pmBOI - BWI

1 stop15h 54mMultiple Airlines

Wed 5/285:23 pmBWI - BOI

1 stop20h 28mMultiple Airlines

Deal found 4/28

$246

Tue 7/111:40 pmBOI - BWI

1 stop9h 12mDelta

Tue 7/87:18 pmBWI - BOI

1 stop6h 41mDelta

Deal found 4/28

$287

Wed 5/211:40 pmGEG - IAD

1 stop7h 19mHawaiian Airlines

Sun 5/256:30 amIAD - GEG

1 stop9h 15mHawaiian Airlines

Deal found 4/28

$296

Wed 6/116:00 amGEG - IAD

1 stop8h 35mAmerican Airlines

Tue 6/176:27 amIAD - GEG

1 stop8h 18mAmerican Airlines

Deal found 4/27

$297

Wed 5/146:00 amGEG - BWI

1 stop8h 30mUnited Airlines

Sun 5/186:35 amBWI - GEG

1 stop11h 06mUnited Airlines

Deal found 4/29

$316

Thu 7/34:53 pmGEG - BWI

1 stop15h 48mSun Country Air

Sun 7/612:25 pmBWI - GEG

1 stop7h 04mSun Country Air

Deal found 4/28

$325

Tue 8/126:05 pmBOI - BWI

2 stops8h 55mSouthwest

Mon 8/186:10 amBWI - BOI

2 stops13h 35mSouthwest

Deal found 4/28

$341

Mon 9/19:49 pmBOI - BWI

2 stops24h 45mSpirit Airlines

Sat 9/65:45 amBWI - BOI

3 stops16h 59mSpirit Airlines

Deal found 4/29

$537

Fri 5/236:03 pmGEG - BWI

1 stop22h 36mMultiple Airlines

Mon 5/266:20 amBWI - GEG

2 stops13h 53mMultiple Airlines

Deal found 4/29

$277

Sat 8/96:00 pmBOI - IAD

1 stop10h 50mAlaska Airlines

Sat 8/166:30 amIAD - BOI

1 stop10h 34mAlaska Airlines

Deal found 4/28

$279

Last-minute flights from Idaho to Washington, D.C.
Discover last-minute flight deals from Idaho to Washington, D.C.. Data last updated April 30, 2025 and is based on user searches.

Sun 5/41:35 pmBOI - DCA

2 stops24h 27mUnited Airlines

Wed 5/77:00 amDCA - BOI

1 stop11h 21mUnited Airlines

Deal found 4/28

$622

Sun 5/44:35 pmIDA - IAD

1 stop13h 08mAlaska Airlines

Tue 5/66:30 amIAD - IDA

1 stop11h 28mAlaska Airlines

Deal found 4/27

$640

Sun 5/44:10 pmGEG - DCA

2 stops16h 46mUnited Airlines

Tue 5/64:16 pmDCA - GEG

1 stop7h 34mUnited Airlines

Deal found 4/28

$685

Sun 5/47:05 amBOI - DCA

2 stops9h 54mAmerican Airlines

Wed 5/77:30 amDCA - BOI

1 stop7h 50mAmerican Airlines

Deal found 4/29

$742

Sun 5/47:27 pmGEG - IAD

1 stop9h 16mAlaska Airlines

Tue 5/67:00 amIAD - GEG

1 stop9h 33mAlaska Airlines

Deal found 4/28

$840

Sun 5/47:25 pmGEG - IAD

1 stop7h 55mDelta

Tue 5/612:29 pmIAD - GEG

2 stops14h 30mDelta

Deal found 4/28

$876

Sun 5/48:00 pmBOI - IAD

2 stops13h 31mDelta

Wed 5/75:24 pmIAD - BOI

2 stops8h 58mDelta

Deal found 4/28

$881

Sun 5/47:50 pmBOI - DCA

2 stops11h 16mDelta

Wed 5/74:00 pmDCA - BOI

2 stops10h 22mDelta

Deal found 4/28

$881

Sun 5/47:25 pmGEG - DCA

2 stops10h 11mDelta

Tue 5/66:00 amDCA - GEG

2 stops11h 54mDelta

Deal found 4/28

$881

Tue 5/61:23 pmJAC - IAD

1 stop8h 08mDelta

Fri 5/912:25 pmIAD - JAC

2 stops10h 23mDelta

Deal found 4/28

$990

Wed 5/71:00 pmBOI - IAD

1 stop8h 58mAlaska Airlines

Sat 5/106:30 amIAD - BOI

1 stop9h 17mAlaska Airlines

Deal found 4/28

$300

Wed 5/77:14 amBOI - IAD

1 stop7h 03mAmerican Airlines

Sat 5/106:17 amIAD - BOI

2 stops12h 23mAmerican Airlines

Deal found 4/28

$456

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 30, 2025.

Mon 6/95:57 pmGEG - BWI

1 stop22h 42mMultiple Airlines

Deal found 4/29

$94

Tue 5/2012:26 pmGEG - DCA

1 stop6h 33mFrontier

Deal found 4/29

$99

Sun 6/812:36 pmBOI - DCA

1 stop7h 23mFrontier

Deal found 4/27

$127

Tue 7/157:44 pmGEG - IAD

1 stop8h 43mAlaska Airlines

Deal found 4/28

$135

Wed 6/47:26 pmGEG - BWI

1 stop8h 03mAlaska Airlines

Deal found 4/29

$135

Sun 6/812:36 pmBOI - BWI

1 stop25h 49mFrontier

Deal found 4/27

$137

Wed 6/47:00 amGEG - DCA

1 stop11h 05mAlaska Airlines

Deal found 4/29

$139

Tue 5/277:18 pmBOI - BWI

1 stop8h 22mDelta

Deal found 4/28

$144

Fri 5/301:40 pmGEG - IAD

1 stop7h 19mHawaiian Airlines

Deal found 4/29

$148

Fri 5/307:10 amGEG - DCA

1 stop10h 49mHawaiian Airlines

Deal found 4/28

$148

Thu 7/176:25 pmGEG - IAD

1 stop7h 59mUnited Airlines

Deal found 4/29

$149

Sun 6/811:10 pmGEG - DCA

1 stop6h 59mDelta

Deal found 4/28

$149

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

BoiseBaltimore

BOI - BWI

BOIBWI

Boise Air Term. Gowen Fld

Wed 9/3

5:45 pm-5:33 am

1 stop9h 48m

Baltimore/Washington

Wed 9/10

7:00 am-3:00 pm

1 stop10h 00m

$212

SpokaneBaltimore

GEG - BWI

GEGBWI

Spokane

Sun 6/1

11:48 am-4:25 pm

1 stop25h 37m

Baltimore/Washington

Sat 6/7

5:20 pm-11:03 am

1 stop20h 43m

$228

BoiseBaltimore

BOI - BWI

BOIBWI

Boise Air Term. Gowen Fld

Fri 5/23

12:16 pm-6:10 am

1 stop15h 54m

Baltimore/Washington

Wed 5/28

5:23 pm-11:51 am

1 stop20h 28m

$246

SpokaneBaltimore

GEG - BWI

GEGBWI

Spokane

Fri 5/23

6:03 pm-7:39 pm

1 stop22h 36m

Baltimore/Washington

Mon 5/26

6:20 am-5:13 pm

2 stops13h 53m

$277

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Sat 8/9

6:00 pm-6:50 am

1 stop10h 50m

Washington, D.C. Dulles Intl

Sat 8/16

6:30 am-3:04 pm

1 stop10h 34m

$279

BoiseBaltimore

BOI - BWI

BOIBWI

Boise Air Term. Gowen Fld

Tue 7/1

11:40 pm-10:52 am

1 stop9h 12m

Baltimore/Washington

Tue 7/8

7:18 pm-11:59 pm

1 stop6h 41m

$287

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Wed 5/21

1:40 pm-11:59 pm

1 stop7h 19m

Washington, D.C. Dulles Intl

Sun 5/25

6:30 am-12:45 pm

1 stop9h 15m

$296

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Wed 5/21

11:33 am-9:59 pm

1 stop7h 26m

Washington, D.C. Reagan-National

Sun 5/25

9:59 am-11:47 pm

1 stop16h 48m

$296

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Wed 6/11

6:00 am-5:35 pm

1 stop8h 35m

Washington, D.C. Dulles Intl

Tue 6/17

6:27 am-11:45 am

1 stop8h 18m

$297

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Wed 5/21

6:00 am-4:00 pm

1 stop7h 00m

Washington, D.C. Reagan-National

Sun 5/25

7:50 am-12:46 pm

1 stop7h 56m

$297

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

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 $373). 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

9,961 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Alaska Airlines

8.0

Very good

9,961 reviews

Alaska Airlines

8.0

Very good

9,961 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Southwest

8.0

Very good

4,295 reviews

Alaska Airlines

8.0

Very good

9,961 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Delta

8.0

Very good

7,929 reviews

Alaska Airlines

8.0

Very good

9,961 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Hawaiian Airlines

7.9

Good

2,405 reviews

Alaska Airlines

8.0

Very good

9,961 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

United Airlines

7.4

Good

8,696 reviews

Alaska Airlines

8.0

Very good

9,961 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 $99 on Frontier. Other airlines that offer cheap prices include Alaska Airlines from $135 and Delta from $144 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. Reagan-National, Boise Air Term. Gowen Fld - Washington, D.C. Dulles Intl or Spokane - 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, 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 $373). 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

Alexandria

Arlington

Woodbridge

Tysons

Fairfax

Springfield

Rockville

Fredericksburg

Silver Spring

Gaithersburg

Linthicum Heights

Falls Church

Laurel

Easton

Towson

Herndon

Bowie

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$300	Average$463	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$316	Average$626	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$346	Average$482	FlexibilityNo cancel fee	On-time63%

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$94+ 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 6/9. 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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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 30, 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 30, 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 30, 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 30, 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 30, 2025.