What are the cheapest airlines to fly from Washington, D.C. to Idaho one-way?

To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $98. Alaska Airlines flights start at $106 while deals on Delta start at $144 one-way.

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

When deciding which route to take from Washington, D.C. to Idaho consider Washington, D.C. Dulles Intl - Jackson Hole, Washington, D.C. Reagan-National - Jackson Hole or Baltimore/Washington - Jackson Hole as they are the most popular.

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

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

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

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 26 days in advance, which can save you up to 87% on flights from Washington, D.C. to Idaho compared to booking the week you need them. Waiting 26 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $398. For sooner than that we have options available in the next 3 days from $398.

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

Our data shows that April tends to be the cheapest month to fly to Idaho from Washington, D.C.. Users have commonly found prices around $468 for the month, but tickets can be as low as $212. Due to multiple factors, prepare for potentially higher prices in December.

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

Yes. In addition to deals on Washington, D.C. to Idaho flights, Cheapflights offers vacation packages that include both flights and hotel.

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

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to Idaho.

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

Yes. Cheapflights offers flight deals from Washington, D.C. to Idaho by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$98+ Flights from Washington, D.C. to Idaho

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

Most accurate provider	FlightHub 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$212 (Alaska Airlines)
One-way from	$98 (Cheapflightsfares)
Popular in	December
Cheapest in	April
Average price	$321

Provider with most accurate pricing for Washington, D.C. (WAS)-Boise Air Term. Gowen Fld flight deals.

Search Deals

Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Boise Air Term. Gowen Fld flights.

Search Deals

From Washington, D.C. (WAS) to Idaho

Search Deals

One-way flight from Washington, D.C. (WAS) to Idaho

Search Deals

Highest demand for flights based on searches. 13% potential increase in price ($69 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease ($23 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

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

Cheapest flights from Washington, D.C. to Idaho
Explore the most affordable flight options available from Washington, D.C. to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2025.

Wed 4/306:30 amIAD - BOI

1 stop9h 17mAlaska Airlines

Tue 5/62:41 pmBOI - IAD

1 stop7h 17mAlaska Airlines

Deal found 4/16

$212

Thu 5/157:00 amDCA - BOI

1 stop8h 37mFrontier

Thu 5/2212:36 pmBOI - DCA

1 stop7h 23mFrontier

Deal found 4/16

$238

Wed 4/307:06 amBWI - GEG

1 stop8h 25mAlaska Airlines

Wed 5/77:00 amGEG - BWI

1 stop8h 05mAlaska Airlines

Deal found 4/16

$271

Wed 4/308:00 amDCA - BOI

1 stop9h 45mAlaska Airlines

Sat 5/39:18 amBOI - DCA

1 stop10h 41mAlaska Airlines

Deal found 4/16

$279

Sat 5/176:55 amBWI - BOI

1 stop6h 59mDelta

Tue 5/277:18 pmBOI - BWI

1 stop8h 22mDelta

Deal found 4/17

$287

Sat 5/319:59 amDCA - GEG

1 stop16h 48mAlaska Airlines

Sat 6/77:00 amGEG - DCA

1 stop11h 05mAlaska Airlines

Deal found 4/15

$296

Sat 5/175:14 pmIAD - GEG

1 stop9h 33mHawaiian Airlines

Wed 5/217:26 pmGEG - IAD

1 stop9h 10mHawaiian Airlines

Deal found 4/17

$296

Sat 5/316:15 amBWI - GEG

1 stop9h 32mDelta

Sat 6/145:10 pmGEG - BWI

1 stop9h 37mDelta

Deal found 4/15

$297

Wed 5/286:55 pmDCA - GEG

1 stop7h 20mDelta

Wed 6/1111:42 amGEG - DCA

1 stop7h 18mDelta

Deal found 4/15

$297

Tue 7/87:30 amIAD - GEG

1 stop10h 12mDelta

Tue 7/226:50 amGEG - IAD

1 stop8h 08mDelta

Deal found 4/17

$297

Wed 5/146:30 amIAD - BOI

1 stop9h 17mHawaiian Airlines

Wed 5/217:06 pmBOI - IAD

1 stop10h 30mHawaiian Airlines

Deal found 4/15

$300

Wed 7/96:55 amDCA - BOI

1 stop9h 46mAmerican Airlines

Sat 7/193:35 pmBOI - DCA

1 stop7h 14mAmerican Airlines

Deal found 4/17

$301

Best flights from Washington, D.C. to Idaho
Discover carefully curated flight deals from Washington, D.C. to Idaho that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 17, 2025.

Wed 4/306:30 amIAD - BOI

1 stop7h 46mAlaska Airlines

Sat 5/102:41 pmBOI - IAD

1 stop7h 17mAlaska Airlines

Deal found 4/16

$212

Thu 5/157:00 amDCA - BOI

1 stop8h 37mFrontier

Sun 5/182:27 pmBOI - DCA

1 stop19h 40mFrontier

Deal found 4/17

$228

Sat 5/176:55 amBWI - BOI

1 stop6h 59mDelta

Wed 5/287:18 pmBOI - BWI

1 stop8h 22mDelta

Deal found 4/17

$287

Sat 5/175:14 pmIAD - GEG

1 stop9h 33mHawaiian Airlines

Wed 5/217:26 pmGEG - IAD

1 stop9h 10mHawaiian Airlines

Deal found 4/17

$296

Wed 7/96:55 amDCA - BOI

1 stop9h 46mAmerican Airlines

Sat 7/193:35 pmBOI - DCA

1 stop7h 14mAmerican Airlines

Deal found 4/17

$301

Thu 7/1012:25 pmBWI - GEG

1 stop8h 22mSun Country Air

Sun 7/135:11 pmGEG - BWI

1 stop15h 18mSun Country Air

Deal found 4/16

$315

Sat 5/175:35 pmIAD - BOI

1 stop7h 17mUnited Airlines

Sat 5/247:07 pmBOI - IAD

1 stop8h 01mUnited Airlines

Deal found 4/16

$347

Thu 5/111:12 amBWI - BOI

2 stops27h 45mSpirit Airlines

Mon 5/51:52 pmBOI - BWI

2 stops26h 01mSpirit Airlines

Deal found 4/17

$350

Tue 8/122:20 pmBWI - GEG

2 stops10h 55mSouthwest

Tue 8/198:25 amGEG - BWI

2 stops10h 30mSouthwest

Deal found 4/15

$353

Mon 5/127:06 amBWI - BOI

1 stop8h 41mMultiple Airlines

Fri 5/1612:16 pmBOI - BWI

1 stop15h 54mMultiple Airlines

Deal found 4/17

$383

Wed 4/307:06 amBWI - GEG

1 stop8h 25mAlaska Airlines

Wed 5/77:00 amGEG - BWI

1 stop8h 05mAlaska Airlines

Deal found 4/16

$271

Tue 7/87:20 pmBWI - GEG

1 stop6h 43mDelta

Tue 7/227:07 pmGEG - BWI

1 stop7h 59mDelta

Deal found 4/16

$297

Last-minute flights from Washington, D.C. to Idaho
Discover last-minute flight deals from Washington, D.C. to Idaho. Data last updated April 17, 2025 and is based on user searches.

Wed 4/235:38 pmDCA - GEG

1 stop9h 21mHawaiian Airlines

Sat 4/267:00 amGEG - DCA

1 stop10h 58mHawaiian Airlines

Deal found 4/16

$624

Sat 4/267:06 amBWI - BOI

1 stop8h 41mAlaska Airlines

Fri 5/26:30 amBOI - BWI

1 stop9h 35mAlaska Airlines

Deal found 4/16

$497

Sat 4/268:30 amIAD - BOI

1 stop9h 51mUnited Airlines

Fri 5/22:43 pmBOI - IAD

1 stop6h 29mUnited Airlines

Deal found 4/16

$568

Sat 4/266:15 amBWI - BOI

2 stops9h 17mUnited Airlines

Fri 5/22:43 pmBOI - BWI

1 stop6h 34mUnited Airlines

Deal found 4/16

$571

Sat 4/266:18 amIAD - BOI

1 stop8h 15mAmerican Airlines

Fri 5/21:23 pmBOI - IAD

1 stop7h 19mAmerican Airlines

Deal found 4/16

$573

Sat 4/268:30 amBWI - GEG

1 stop8h 45mSouthwest

Tue 4/295:50 amGEG - BWI

2 stops11h 15mSouthwest

Deal found 4/16

$602

Sat 4/2610:00 amIAD - BOI

1 stop8h 55mAlaska Airlines

Fri 5/25:40 pmBOI - IAD

2 stops12h 03mAlaska Airlines

Deal found 4/16

$612

Sat 4/267:00 amIAD - GEG

1 stop9h 33mHawaiian Airlines

Tue 4/291:25 pmGEG - IAD

1 stop7h 33mHawaiian Airlines

Deal found 4/17

$624

Sat 4/265:00 pmDCA - GEG

1 stop8h 59mAmerican Airlines

Tue 4/295:34 amGEG - DCA

2 stops9h 25mAmerican Airlines

Deal found 4/16

$630

Sun 4/277:06 amBWI - GEG

1 stop8h 25mAlaska Airlines

Sat 5/107:27 pmGEG - BWI

1 stop7h 19mAlaska Airlines

Deal found 4/16

$551

Sun 4/277:05 amBWI - BOI

1 stop7h 05mDelta

Sat 5/102:47 pmBOI - BWI

1 stop7h 12mDelta

Deal found 4/16

$572

Sun 4/276:15 amBWI - BOI

1 stop8h 18mAmerican Airlines

Wed 5/71:38 pmBOI - BWI

1 stop7h 43mAmerican Airlines

Deal found 4/16

$622

One-way flights from Washington, D.C. to Idaho
Search for one-way flight options from Washington, D.C. to Idaho. Find affordable one-way fares based on user searches. Data last updated April 17, 2025.

Thu 5/297:00 amDCA - BOI

1 stop6h 51mFrontier

Deal found 4/17

$98

Tue 5/66:30 amIAD - BOI

1 stop9h 17mAlaska Airlines

Deal found 4/17

$106

Thu 6/57:00 amDCA - GEG

1 stop7h 03mFrontier

Deal found 4/16

$119

Sat 6/75:20 pmBWI - BOI

1 stop20h 27mFrontier

Deal found 4/17

$120

Sat 5/317:17 amBWI - GEG

1 stop28h 21mMultiple Airlines

Deal found 4/15

$139

Thu 5/296:15 amBWI - BOI

1 stop9h 31mDelta

Deal found 4/16

$144

Sat 5/314:59 pmDCA - GEG

1 stop8h 51mDelta

Deal found 4/15

$149

Thu 6/57:45 amIAD - GEG

1 stop10h 05mDelta

Deal found 4/16

$149

Sun 6/296:00 amIAD - BOI

1 stop8h 36mDelta

Deal found 4/15

$151

Sun 6/296:10 amDCA - BOI

1 stop9h 43mDelta

Deal found 4/17

$151

Sat 5/316:00 amBWI - GEG

2 stops9h 53mDelta

Deal found 4/15

$154

Thu 7/3112:25 pmBWI - BOI

1 stop7h 31mSun Country Air

Deal found 4/16

$163

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Wed 4/30

6:30 am-12:16 pm

1 stop7h 46m

Boise Air Term. Gowen Fld

Sat 5/10

2:41 pm-11:58 pm

1 stop7h 17m

$212

Washington, D.C.Boise

DCA - BOI

DCABOI

Washington, D.C. Reagan-National

Thu 5/15

7:00 am-1:37 pm

1 stop8h 37m

Boise Air Term. Gowen Fld

Thu 5/22

12:36 pm-9:59 pm

1 stop7h 23m

$238

BaltimoreSpokane

BWI - GEG

BWIGEG

Baltimore/Washington

Wed 4/30

7:06 am-12:31 pm

1 stop8h 25m

Spokane

Sat 5/10

5:40 pm-5:46 am

1 stop9h 06m

$271

Washington, D.C.Boise

DCA - BOI

DCABOI

Washington, D.C. Reagan-National

Wed 4/30

8:00 am-3:45 pm

1 stop9h 45m

Boise Air Term. Gowen Fld

Sat 5/3

9:18 am-9:59 pm

1 stop10h 41m

$279

BaltimoreBoise

BWI - BOI

BWIBOI

Baltimore/Washington

Sat 5/17

6:55 am-11:54 am

1 stop6h 59m

Boise Air Term. Gowen Fld

Tue 5/27

7:18 pm-5:40 am

1 stop8h 22m

$287

Washington, D.C.Spokane

IAD - GEG

IADGEG

Washington, D.C. Dulles Intl

Sat 5/17

5:14 pm-11:47 pm

1 stop9h 33m

Spokane

Wed 5/21

7:26 pm-7:36 am

1 stop9h 10m

$296

Washington, D.C.Spokane

DCA - GEG

DCAGEG

Washington, D.C. Reagan-National

Sat 5/31

9:59 am-11:47 pm

1 stop16h 48m

Spokane

Sat 6/7

7:00 am-9:05 pm

1 stop11h 05m

$296

BaltimoreSpokane

BWI - GEG

BWIGEG

Baltimore/Washington

Sat 5/31

6:15 am-12:47 pm

1 stop9h 32m

Spokane

Sat 6/14

5:10 pm-5:47 am

1 stop9h 37m

$297

Washington, D.C.Spokane

DCA - GEG

DCAGEG

Washington, D.C. Reagan-National

Wed 5/28

6:55 pm-11:15 pm

1 stop7h 20m

Spokane

Wed 6/11

11:42 am-10:00 pm

1 stop7h 18m

$297

Washington, D.C.Spokane

IAD - GEG

IADGEG

Washington, D.C. Dulles Intl

Tue 7/8

6:15 am-10:00 am

1 stop6h 45m

Spokane

Fri 7/25

7:21 pm-5:59 am

1 stop7h 38m

$297

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

Showing 1-10 of 60 results

...

Best time to book a flight from Washington, D.C. to Idaho

Have a flexible travel schedule? Discover the best time to fly to Idaho from Washington, D.C. 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 Washington, D.C. to Idaho

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

Currently, October is the cheapest month in which you can book a flight from Washington, D.C. to Idaho (average of $314). Flying from Washington, D.C. to Idaho in June is currently the most expensive (average of $419). 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 WAS to ID?

When flying from Washington, D.C. to Idaho, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Idaho by month

In terms of precipitation, rainfall in Idaho ranges from 0.2 - 1.6 inches per month. December is typically the wettest month, when rainfall can reach 1.6 in. August is typically the driest time to visit Idaho when rainfall is around 0.2 in.

Temperature in Idaho by month

If weather is an important factor for your trip to Idaho, 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 75.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 30.2 F).

Reviews of airlines servicing Idaho

To help decide which airline to fly from Washington, D.C. to Idaho, see what other customers have to say about Alaska Airlines, Southwest and Delta. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

9,887 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

9,887 reviews

Alaska Airlines

8.0

Very good

9,887 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

4,280 reviews

Alaska Airlines

8.0

Very good

9,887 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

7,916 reviews

Alaska Airlines

8.0

Very good

9,887 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

2,385 reviews

Alaska Airlines

8.0

Very good

9,887 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

8,667 reviews

Alaska Airlines

8.0

Very good

9,887 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 Washington, D.C. to Idaho one-way?
To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $98. Alaska Airlines flights start at $106 while deals on Delta start at $144 one-way.
What are the most popular routes from Washington, D.C. to Idaho?
When deciding which route to take from Washington, D.C. to Idaho consider Washington, D.C. Dulles Intl - Jackson Hole, Washington, D.C. Reagan-National - Jackson Hole or Baltimore/Washington - Jackson Hole as they are the most popular.
Can I find deals for flights from Washington, D.C. to Idaho that include hotel bookings?
Yes. In addition to deals on Washington, D.C. to Idaho flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Washington, D.C. to Idaho?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to Idaho.
Can I find deals for business class flights from Washington, D.C. to Idaho?
Yes. Cheapflights offers flight deals from Washington, D.C. to Idaho 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 Washington, D.C. to Idaho?
Currently, October is the cheapest month in which you can book a flight from Washington, D.C. to Idaho (average of $314). Flying from Washington, D.C. to Idaho in June is currently the most expensive (average of $419). 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

Browse thousands of different options on Cheapflights for your next trip

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

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$180	Average$294	FlexibilityNo cancel fee	On-time65%
Alaska Airlines	Cheapest$230	Average$578	FlexibilityNo cancel fee	On-time75%
Delta	Cheapest$230	Average$501	FlexibilityNo cancel fee	On-timeN/A
Southwest	Cheapest$274	Average$567	FlexibilityNo cancel fee	On-time63%
United Airlines	Cheapest$298	Average$673	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$334	Average$632	FlexibilityNo cancel fee	On-time71%

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$98+ Cheap flights from Washington, D.C. (WAS) to Idaho

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 5/29. Fares are subject to change and may not be available on all flights or dates of travel.

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

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

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

Keep the following information in mind while searching for Washington, D.C. to Idaho flight deals. Data was last updated April 17, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

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

Cheapest flights from Washington, D.C. to IdahoExplore the most affordable flight options available from Washington, D.C. to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2025.

Explore the most affordable flight options available from Washington, D.C. to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Washington, D.C. to Idaho

Have a flexible travel schedule? Discover the best time to fly to Idaho from Washington, D.C. with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. to Idaho

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

What is the cheapest time of day to fly from WAS to ID?

Find hourly flight availability from Washington, D.C. to Idaho. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 17, 2025.

Rainfall in Idaho by month

Plan your trip to Idaho by taking into account the average rainfall totals by month.

Temperature in Idaho by month

Plan your trip to Idaho by taking into account the average temperature totals by month.

Reviews of airlines servicing Idaho

Get insights into the airlines that provide service to Idaho. 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 Idaho. Reviews last updated April 17, 2025.

To help decide which airline to fly from Washington, D.C. to Idaho, see what other customers have to say about Alaska Airlines, Southwest and Delta. You can also see how each airline stacks up 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 Washington, D.C. to Idaho. 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 Washington, D.C. to Idaho one-way?

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

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

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

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

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Washington, D.C. to Idaho

See prices for flight routes from nearby airports that may be better suited for you.

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

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Cheapest flights from Washington, D.C. to Idaho
Explore the most affordable flight options available from Washington, D.C. to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2025.