How long is the flight from Washington, D.C. to Idaho?

United Airlines, Alaska Airlines, and Delta can get you from Washington, D.C. to Idaho in just under 7h 04m. Your travel time can differ by up to 12h 46m. Airlines will cover a distance of 1745 mi. This flight may include one or multiple stops.

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

To fly one-way, consider booking your trip with American Airlines, which is currently one of the cheapest options available, starting at $154. Alaska Airlines flights start at $158 while deals on Delta start at $159 one-way.

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.

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).

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?

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

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.

$136+ Cheap Flights from Washington, D.C. to Idaho

Q: How much does it cost to fly round-trip from Washington, D.C. to Idaho?

Airfare is below average for this route at the moment. Washington, D.C. to Idaho flights typically cost between $422 and $561 in February. The cheapest round-trip price found within the last 3 days was $241 on Frontier (Feb 7-Feb 15).

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

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

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 November 3, 2025.

Wed 11/198:15 amDCA - GEG

2 stops34h 52mMultiple Airlines

Thu 12/412:08 pmGEG - DCA

1 stop21h 58mMultiple Airlines

Deal found 10/31

$257

Wed 12/106:00 amIAD - JAC

1 stop8h 14mAmerican Airlines

Mon 12/151:04 pmJAC - IAD

1 stop7h 55mAmerican Airlines

Deal found 11/1

$280

Sat 11/156:00 pmDCA - GEG

1 stop20h 08mFrontier

Thu 12/412:08 pmGEG - DCA

1 stop21h 58mFrontier

Deal found 10/31

$282

Wed 12/107:15 amBWI - BOI

2 stops10h 47mDelta

Sun 12/147:45 pmBOI - BWI

2 stops13h 02mDelta

Deal found 11/2

$304

Wed 12/108:00 amDCA - GEG

1 stop14h 05mAlaska Airlines

Mon 12/157:47 pmGEG - DCA

1 stop17h 21mAlaska Airlines

Deal found 10/31

$304

Wed 12/107:34 amIAD - GEG

1 stop14h 31mAlaska Airlines

Mon 12/157:47 pmGEG - IAD

1 stop17h 49mAlaska Airlines

Deal found 11/2

$304

Thu 12/117:15 amIAD - GEG

1 stop10h 40mDelta

Sun 12/141:10 pmGEG - IAD

1 stop7h 17mDelta

Deal found 11/2

$305

Thu 12/116:00 amBWI - BOI

2 stops12h 02mDelta

Mon 12/154:45 pmBOI - BWI

2 stops11h 15mDelta

Deal found 11/2

$314

Wed 12/106:00 amIAD - GEG

2 stops9h 29mDelta

Mon 12/151:10 pmGEG - IAD

1 stop7h 17mDelta

Deal found 11/1

$336

Fri 12/1210:08 amIAD - JAC

2 stops13h 21mDelta

Tue 12/1612:55 pmJAC - IAD

2 stops9h 17mDelta

Deal found 11/1

$339

Thu 12/47:00 amBWI - BOI

1 stop11h 16mAlaska Airlines

Sat 1/106:23 amBOI - BWI

1 stop9h 51mAlaska Airlines

Deal found 11/1

$342

Thu 12/43:17 pmBWI - BOI

1 stop8h 46mAmerican Airlines

Sat 1/101:58 pmBOI - BWI

1 stop7h 12mAmerican Airlines

Deal found 10/31

$343

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 November 3, 2025.

Wed 3/113:58 pmIAD - JAC

1 stop7h 04mUnited Airlines

Tue 3/177:00 amJAC - IAD

1 stop6h 37mUnited Airlines

Deal found 11/2

$290

Thu 12/117:34 amIAD - GEG

1 stop19h 50mAlaska Airlines

Mon 12/157:47 pmGEG - IAD

1 stop17h 49mAlaska Airlines

Deal found 11/2

$304

Sun 1/187:30 amIAD - GEG

1 stop10h 30mDelta

Sat 1/2412:55 pmGEG - IAD

1 stop6h 58mDelta

Deal found 11/1

$317

Sat 1/175:55 amDCA - BOI

2 stops10h 27mAmerican Airlines

Tue 1/203:14 pmBOI - DCA

1 stop6h 45mAmerican Airlines

Deal found 11/2

$326

Fri 1/161:40 pmBWI - BOI

2 stops12h 00mSouthwest

Tue 1/207:45 amBOI - BWI

2 stops7h 30mSouthwest

Deal found 11/1

$382

Sat 11/152:00 pmDCA - GEG

1 stop24h 08mMultiple Airlines

Sun 11/234:57 pmGEG - DCA

2 stops17h 06mMultiple Airlines

Deal found 10/31

$391

Wed 12/107:34 amIAD - GEG

1 stop16h 54mAlaska Airlines

Mon 12/157:47 pmGEG - IAD

1 stop17h 49mAlaska Airlines

Deal found 11/1

$304

Sat 1/1712:35 pmIAD - BOI

1 stop7h 32mUnited Airlines

Tue 1/206:10 amBOI - IAD

1 stop7h 03mUnited Airlines

Deal found 11/2

$321

Sat 2/711:13 amBWI - BOI

2 stops10h 12mAmerican Airlines

Sun 2/151:24 pmBOI - BWI

1 stop6h 23mAmerican Airlines

Deal found 11/1

$327

Wed 12/107:15 amBWI - BOI

1 stop6h 47mDelta

Sun 12/147:45 pmBOI - BWI

2 stops12h 17mDelta

Deal found 11/2

$330

Sat 1/178:00 amDCA - BOI

1 stop9h 10mAlaska Airlines

Tue 1/201:55 pmBOI - DCA

1 stop24h 14mAlaska Airlines

Deal found 11/2

$320

Wed 12/103:38 pmIAD - GEG

2 stops10h 11mDelta

Mon 12/151:10 pmGEG - IAD

1 stop7h 17mDelta

Deal found 11/2

$336

Tue 1/64:10 pmBWI - BOI

1 stop7h 42mUnited Airlines

Thu 1/157:45 amBOI - BWI

2 stops11h 41mUnited Airlines

Deal found 11/1

$348

Thu 12/44:45 pmDCA - BOI

2 stops8h 25mSouthwest

Mon 12/86:10 amBOI - DCA

1 stop8h 40mSouthwest

Deal found 11/1

$396

Fri 12/1210:08 amIAD - JAC

2 stops13h 21mDelta

Tue 12/1612:55 pmJAC - IAD

2 stops9h 17mDelta

Deal found 11/1

$339

Sat 12/67:34 amIAD - BOI

1 stop9h 52mAlaska Airlines

Mon 12/85:59 pmBOI - IAD

1 stop10h 07mAlaska Airlines

Deal found 11/1

$352

Fri 1/306:00 amDCA - JAC

2 stops10h 42mAmerican Airlines

Tue 2/32:06 pmJAC - DCA

2 stops15h 48mAmerican Airlines

Deal found 11/2

$392

Tue 3/108:20 amIAD - JAC

1 stop7h 09mUnited Airlines

Thu 3/122:30 pmJAC - IAD

1 stop6h 48mUnited Airlines

Deal found 11/1

$370

Fri 11/216:03 amIAD - GEG

1 stop10h 11mDelta

Thu 12/49:25 amGEG - IAD

1 stop11h 02mDelta

Deal found 10/31

$346

Thu 12/114:40 pmDCA - GEG

2 stops8h 45mSouthwest

Sun 12/146:25 amGEG - DCA

2 stops11h 20mSouthwest

Deal found 11/2

$422

Fri 1/305:01 pmDCA - GEG

1 stop21h 11mAlaska Airlines

Mon 2/210:05 amGEG - DCA

1 stop8h 54mAlaska Airlines

Deal found 11/1

$352

Fri 1/3011:34 amIAD - GEG

2 stops11h 12mAmerican Airlines

Mon 2/26:00 amGEG - IAD

1 stop7h 31mAmerican Airlines

Deal found 11/2

$392

Wed 11/1910:56 amBWI - JAC

2 stops11h 41mUnited Airlines

Mon 11/247:00 amJAC - BWI

1 stop6h 18mUnited Airlines

Deal found 11/1

$379

Fri 11/216:03 amIAD - GEG

1 stop10h 11mDelta

Wed 12/35:05 amGEG - IAD

1 stop15h 22mDelta

Deal found 10/31

$346

Thu 12/47:34 amIAD - BOI

1 stop10h 42mAlaska Airlines

Sat 1/107:55 pmBOI - IAD

1 stop19h 09mAlaska Airlines

Deal found 11/1

$355

Tue 2/36:30 amDCA - JAC

1 stop8h 32mAmerican Airlines

Sun 2/81:42 pmJAC - DCA

1 stop8h 17mAmerican Airlines

Deal found 11/1

$394

Fri 1/237:00 amBWI - JAC

1 stop7h 00mDelta

Tue 1/2712:58 pmJAC - BWI

1 stop8h 44mDelta

Deal found 11/2

$349

Thu 12/45:00 pmDCA - BOI

1 stop8h 50mAlaska Airlines

Sat 1/107:45 amBOI - DCA

1 stop11h 15mAlaska Airlines

Deal found 11/1

$355

Thu 1/223:24 pmDCA - BOI

2 stops9h 49mAmerican Airlines

Sun 1/253:14 pmBOI - DCA

1 stop6h 45mAmerican Airlines

Deal found 11/2

$396

Fri 1/26:30 amIAD - SUN

1 stop7h 42mUnited Airlines

Tue 1/612:43 pmSUN - IAD

1 stop6h 34mUnited Airlines

Deal found 11/2

$420

Last-minute flights from Washington, D.C. to Idaho
Discover last-minute flight deals from Washington, D.C. to Idaho. Data last updated November 3, 2025 and is based on user searches.

Sat 11/156:00 pmDCA - GEG

1 stop20h 08mFrontier

Thu 12/412:08 pmGEG - DCA

1 stop21h 58mFrontier

Deal found 10/31

$282

Sat 11/156:00 pmDCA - GEG

1 stop20h 08mMultiple Airlines

Mon 12/17:54 pmGEG - DCA

2 stops14h 12mMultiple Airlines

Deal found 10/31

$374

Sat 11/156:00 pmDCA - GEG

1 stop20h 08mFrontier

Sat 11/2212:06 pmGEG - DCA

1 stop21h 57mFrontier

Deal found 10/31

$391

Wed 11/198:15 amDCA - GEG

2 stops34h 52mMultiple Airlines

Thu 12/412:08 pmGEG - DCA

1 stop21h 58mMultiple Airlines

Deal found 10/31

$257

Wed 11/1910:56 amBWI - JAC

2 stops11h 41mUnited Airlines

Mon 11/247:00 amJAC - BWI

1 stop6h 18mUnited Airlines

Deal found 11/1

$379

Fri 11/216:00 amIAD - GEG

1 stop9h 06mDelta

Fri 12/57:10 amGEG - IAD

1 stop13h 17mDelta

Deal found 10/31

$346

Fri 11/216:59 amDCA - GEG

1 stop8h 07mDelta

Wed 12/35:05 amGEG - DCA

1 stop7h 22mDelta

Deal found 10/31

$352

Fri 11/216:03 amIAD - GEG

1 stop10h 11mDelta

Wed 12/37:36 pmGEG - IAD

2 stops12h 42mDelta

Deal found 10/31

$357

Fri 11/217:15 amIAD - GEG

1 stop8h 15mDelta

Tue 12/211:19 amGEG - IAD

1 stop9h 08mDelta

Deal found 10/31

$374

Fri 11/216:00 pmDCA - GEG

1 stop20h 11mFrontier

Thu 12/412:08 pmGEG - DCA

1 stop21h 58mFrontier

Deal found 10/31

$376

Fri 11/216:00 amDCA - GEG

1 stop9h 06mDelta

Fri 12/56:00 amGEG - DCA

1 stop7h 01mDelta

Deal found 10/31

$387

Wed 11/262:25 pmIAD - JAC

1 stop8h 12mUnited Airlines

Tue 12/27:00 amJAC - IAD

1 stop6h 01mUnited Airlines

Deal found 11/1

$361

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 November 3, 2025.

Wed 11/198:15 amDCA - GEG

2 stops34h 52mMultiple Airlines

Deal found 10/30

$136

Wed 2/116:00 amBWI - BOI

1 stop9h 45mAmerican Airlines

Deal found 11/2

$154

Wed 12/107:34 amIAD - GEG

1 stop8h 05mAlaska Airlines

Deal found 11/1

$158

Wed 12/106:00 amDCA - GEG

1 stop9h 30mAmerican Airlines

Deal found 11/2

$159

Wed 2/1110:38 amBWI - BOI

2 stops12h 19mDelta

Deal found 11/2

$159

Wed 2/118:00 amDCA - BOI

1 stop9h 10mAlaska Airlines

Deal found 11/2

$160

Wed 2/116:00 amIAD - BOI

1 stop9h 08mAmerican Airlines

Deal found 11/2

$161

Wed 12/1711:58 amIAD - JAC

2 stops11h 31mDelta

Deal found 11/2

$161

Wed 12/109:36 amDCA - GEG

2 stops9h 04mDelta

Deal found 11/2

$164

Wed 12/105:03 pmIAD - GEG

2 stops10h 08mDelta

Deal found 11/2

$164

Wed 2/1112:32 pmIAD - BOI

2 stops10h 25mDelta

Deal found 11/1

$166

Wed 2/1112:55 pmDCA - BOI

2 stops10h 02mDelta

Deal found 11/2

$166

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

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$134 (Frontier)
Popular in	December
Cheapest in	April
Average price	$455

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

Highest demand for flights based on searches. 20% potential increase in price ($111 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 6% potential price decrease ($28 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in November 2025

Search Deals

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.Jackson

IAD - JAC

IADJAC

Washington, D.C. Dulles Intl

Wed 3/11

3:58 pm-9:02 pm

1 stop7h 04m

Jackson Hole

Tue 3/17

7:00 am-3:37 pm

1 stop6h 37m

$290

Washington, D.C.Spokane

IAD - GEG

IADGEG

Washington, D.C. Dulles Intl

Thu 12/11

7:34 am-12:24 am

1 stop19h 50m

Spokane

Mon 12/15

7:47 pm-4:36 pm

1 stop17h 49m

$304

Washington, D.C.Spokane

IAD - GEG

IADGEG

Washington, D.C. Dulles Intl

Wed 12/10

7:34 am-9:28 pm

1 stop16h 54m

Spokane

Mon 12/15

7:47 pm-4:36 pm

1 stop17h 49m

$304

Washington, D.C.Spokane

IAD - GEG

IADGEG

Washington, D.C. Dulles Intl

Sun 1/18

7:30 am-3:00 pm

1 stop10h 30m

Spokane

Sat 1/24

12:55 pm-10:53 pm

1 stop6h 58m

$317

Washington, D.C.Boise

DCA - BOI

DCABOI

Washington, D.C. Reagan-National

Sat 1/17

8:00 am-3:10 pm

1 stop9h 10m

Boise Air Term. Gowen Fld

Tue 1/20

1:55 pm-4:09 pm

1 stop24h 14m

$320

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Sat 1/17

12:35 pm-6:07 pm

1 stop7h 32m

Boise Air Term. Gowen Fld

Tue 1/20

6:10 am-3:13 pm

1 stop7h 03m

$321

Washington, D.C.Boise

DCA - BOI

DCABOI

Washington, D.C. Reagan-National

Sat 1/17

5:55 am-2:22 pm

2 stops10h 27m

Boise Air Term. Gowen Fld

Tue 1/20

3:14 pm-11:59 pm

1 stop6h 45m

$326

BaltimoreBoise

BWI - BOI

BWIBOI

Baltimore/Washington

Sat 2/7

11:13 am-7:25 pm

2 stops10h 12m

Boise Air Term. Gowen Fld

Sun 2/15

1:24 pm-9:47 pm

1 stop6h 23m

$327

BaltimoreBoise

BWI - BOI

BWIBOI

Baltimore/Washington

Wed 12/10

7:15 am-12:02 pm

1 stop6h 47m

Boise Air Term. Gowen Fld

Sun 12/14

7:45 pm-10:02 am

2 stops12h 17m

$330

Washington, D.C.Spokane

IAD - GEG

IADGEG

Washington, D.C. Dulles Intl

Wed 12/10

3:38 pm-10:49 pm

2 stops10h 11m

Spokane

Mon 12/15

1:10 pm-11:27 pm

1 stop7h 17m

$336

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/1

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, September is the cheapest month in which you can book a flight from Washington, D.C. to Idaho (average of $150). Flying from Washington, D.C. to Idaho in January is currently the most expensive (average of $335). 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?

It’s typically best to fly out from Washington, D.C. to Idaho at noon. Doing so could potentially save you 28% on the flight price compared to flying in the afternoon, which is usually more expensive.

How much does it cost to fly round-trip from Washington, D.C. to Idaho?

Reviews of airlines servicing Idaho

Read reviews from past customers who have flown Alaska Airlines, Southwest, and Delta from Washington, D.C. to Idaho. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

11,234 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.

Alaska Airlines

8.0

Very good

11,234 reviews

Alaska Airlines

8.0

Very good

11,234 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.

Southwest

8.0

Very good

4,240 reviews

Alaska Airlines

8.0

Very good

11,234 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.

Delta

7.9

Good

8,001 reviews

Alaska Airlines

8.0

Very good

11,234 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.

United Airlines

7.4

Good

8,997 reviews

Alaska Airlines

8.0

Very good

11,234 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.

American Airlines

7.2

Good

11,034 reviews

Alaska Airlines

8.0

Very good

11,234 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.

Related info for your journey

How long is the flight from Washington, D.C. to Idaho?
United Airlines, Alaska Airlines, and Delta can get you from Washington, D.C. to Idaho in just under 7h 04m. Your travel time can differ by up to 12h 46m. Airlines will cover a distance of 1745 mi. This flight may include one or multiple stops.
What are the cheapest airlines to fly from Washington, D.C. to Idaho one-way?
To fly one-way, consider booking your trip with American Airlines, which is currently one of the cheapest options available, starting at $154. Alaska Airlines flights start at $158 while deals on Delta start at $159 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, September is the cheapest month in which you can book a flight from Washington, D.C. to Idaho (average of $150). Flying from Washington, D.C. to Idaho in January is currently the most expensive (average of $335). 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 5 airlines flying from Washington, D.C. to Idaho

Airline	Cheapest	Average	Flexibility	On-time
Alaska Airlines	Cheapest$182	Average$414	FlexibilityNo cancel fee	On-time75%
Delta	Cheapest$202	Average$515	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$222	Average$617	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$300	Average$611	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$347	Average$511	FlexibilityNo cancel fee	On-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

$136+ 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 11/19. 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

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 November 3, 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 November 3, 2025.

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 November 3, 2025.

Most accurate provider

Most trusted provider

Round-trip from

Popular in

Cheapest in

Average price

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 November 3, 2025.

How much does it cost to fly round-trip from Washington, D.C. to Idaho?

Reviews of airlines servicing Idaho

Read reviews from past customers who have flown Alaska Airlines, Southwest, and Delta from Washington, D.C. to Idaho. Reviews also offer insight into each airline's 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.

How long is the flight from Washington, D.C. to Idaho?

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

100% Free

Book with Flexibility

Travel Smart

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 November 3, 2025.