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$150+ 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 2/1. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — BOI
Jan 22 — Jan 291
Wed 1/22
Wed 1/29
1 adult, Economy
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Cheap flight deals from Washington, D.C. to Idaho

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) to Idaho (USID). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 17, 2025.

Round-trip from

$232
(FlightHub)

One-way from

$150
(Alaska Airlines)
From Washington, D.C. (WAS) to Idaho
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One-way flight from Washington, D.C. (WAS) to Idaho
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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 January 17, 2025.

This FlightHub deal was found by Cheapflights users on 1/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/610:37 amBWI - BOI
1 stop10h 06mSpirit Airlines
Sun 2/97:38 pmBOI - BWI
1 stop7h 22mSpirit Airlines
Deal found 1/14$232
This Alaska Airlines deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/15:29 pmDCA - BOI
1 stop8h 29mAlaska Airlines
Sat 2/89:30 amBOI - DCA
1 stop10h 29mAlaska Airlines
Deal found 1/15$300
This Delta deal was found by Cheapflights users on 1/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/306:05 amIAD - BOI
1 stop10h 00mDelta
Thu 2/131:39 pmBOI - IAD
1 stop8h 41mDelta
Deal found 1/16$301
This Delta deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/306:00 amBWI - BOI
1 stop8h 29mDelta
Mon 2/35:30 amBOI - BWI
1 stop6h 34mDelta
Deal found 1/15$301
This Delta deal was found by Cheapflights users on 1/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/185:10 pmDCA - BOI
1 stop9h 08mDelta
Fri 2/215:30 amBOI - DCA
1 stop6h 27mDelta
Deal found 1/16$301
This Alaska Airlines deal was found by Cheapflights users on 1/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/16:22 pmIAD - GEG
1 stop8h 37mAlaska Airlines
Tue 4/155:48 pmGEG - IAD
1 stop8h 46mAlaska Airlines
Deal found 1/14$306
This Delta deal was found by Cheapflights users on 1/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/306:00 amBWI - GEG
1 stop9h 00mDelta
Wed 2/51:10 pmGEG - BWI
1 stop8h 25mDelta
Deal found 1/16$307
This Delta deal was found by Cheapflights users on 1/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/264:40 pmDCA - GEG
1 stop10h 25mDelta
Tue 4/15:15 amGEG - DCA
1 stop7h 14mDelta
Deal found 1/16$307
This Delta deal was found by Cheapflights users on 1/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/36:05 amIAD - GEG
1 stop10h 10mDelta
Sun 2/165:00 amGEG - IAD
1 stop7h 28mDelta
Deal found 1/16$307
This American Airlines deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/11:45 pmDCA - BOI
2 stops10h 07mAmerican Airlines
Sat 2/87:00 amBOI - DCA
2 stops9h 57mAmerican Airlines
Deal found 1/15$311
This American Airlines deal was found by Cheapflights users on 1/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/116:18 amIAD - JAC
1 stop7h 42mAmerican Airlines
Tue 3/1812:53 pmJAC - IAD
1 stop7h 21mAmerican Airlines
Deal found 1/16$327
This Delta deal was found by Cheapflights users on 1/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/197:34 amDCA - JAC
1 stop8h 54mDelta
Wed 2/262:28 pmJAC - DCA
1 stop7h 11mDelta
Deal found 1/16$327

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

Customize your flight search to find flights from Washington, D.C. to Idaho that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 17, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

BaltimoreBoise

BWI - BOI

BWIBOI

Baltimore/Washington

Thu 2/6

10:37 am-6:43 pm

1 stop10h 06m

Boise Air Term. Gowen Fld

Sun 2/9

7:38 pm-5:00 am

1 stop7h 22m

$232

Washington, D.C.Boise

DCA - BOI

DCABOI

Washington, D.C. Reagan-National

Sat 2/1

5:29 pm-11:58 pm

1 stop8h 29m

Boise Air Term. Gowen Fld

Sat 2/8

9:30 am-9:59 pm

1 stop10h 29m

$300

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Thu 1/30

6:05 am-2:05 pm

1 stop10h 00m

Boise Air Term. Gowen Fld

Thu 2/13

1:39 pm-12:20 am

1 stop8h 41m

$301

BaltimoreBoise

BWI - BOI

BWIBOI

Baltimore/Washington

Thu 1/30

6:00 am-12:29 pm

1 stop8h 29m

Boise Air Term. Gowen Fld

Mon 2/3

5:30 am-2:04 pm

1 stop6h 34m

$301

Washington, D.C.Boise

DCA - BOI

DCABOI

Washington, D.C. Reagan-National

Tue 2/18

5:10 pm-12:18 am

1 stop9h 08m

Boise Air Term. Gowen Fld

Fri 2/21

5:30 am-1:57 pm

1 stop6h 27m

$301

BaltimoreSpokane

BWI - GEG

BWIGEG

Baltimore/Washington

Sat 2/1

8:30 am-1:15 pm

1 stop7h 45m

Spokane

Tue 3/4

1:10 pm-12:35 am

1 stop8h 25m

$307

Washington, D.C.Spokane

DCA - GEG

DCAGEG

Washington, D.C. Reagan-National

Wed 3/26

4:40 pm-12:05 am

1 stop10h 25m

Spokane

Tue 4/1

5:15 am-3:29 pm

1 stop7h 14m

$307

Washington, D.C.Spokane

IAD - GEG

IADGEG

Washington, D.C. Dulles Intl

Mon 2/3

6:05 am-1:15 pm

1 stop10h 10m

Spokane

Sun 2/16

5:00 am-3:28 pm

1 stop7h 28m

$307

Washington, D.C.Boise

DCA - BOI

DCABOI

Washington, D.C. Reagan-National

Sat 2/1

1:45 pm-9:52 pm

2 stops10h 07m

Boise Air Term. Gowen Fld

Sat 2/8

7:00 am-6:57 pm

2 stops9h 57m

$311

Washington, D.C.Jackson

IAD - JAC

IADJAC

Washington, D.C. Dulles Intl

Tue 3/11

6:18 am-12:00 pm

1 stop7h 42m

Jackson Hole

Tue 3/18

12:53 pm-10:14 pm

1 stop7h 21m

$327

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/16

Showing 1-10 of 60 results
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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.

Travel insights for flights from Washington, D.C. to Idaho

Get recent, data-driven insights about flights from Washington, D.C. to Idaho including ideal travel times, pricing trends, and more.

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 $436). 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?

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 January 17, 2025.

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

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

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

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 January 17, 2025.
To help decide which airline to fly from Washington, D.C. to Idaho, see what other customers have to say about Southwest, Delta and United Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,659 reviews

Boarding

8.2

Crew

8.7

Overall

8.1

Comfort

8.1

Entertainment

7.7

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,659 reviews
Southwest
8.1
Very good
4,659 reviews

Boarding

8.2

Crew

8.7

Overall

8.1

Comfort

8.1

Entertainment

7.7

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Alaska Airlines
8.0
Very good
9,681 reviews
Southwest
8.1
Very good
4,659 reviews

Boarding

8.2

Crew

8.7

Overall

8.1

Comfort

8.1

Entertainment

7.7

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,511 reviews
Southwest
8.1
Very good
4,659 reviews

Boarding

8.2

Crew

8.7

Overall

8.1

Comfort

8.1

Entertainment

7.7

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
8,964 reviews
Southwest
8.1
Very good
4,659 reviews

Boarding

8.2

Crew

8.7

Overall

8.1

Comfort

8.1

Entertainment

7.7

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,659 reviews

Boarding

8.2

Crew

8.7

Overall

8.1

Comfort

8.1

Entertainment

7.7

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

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?

    To fly one-way, consider booking your trip with Alaska Airlines, which is currently one of the cheapest options available, starting at $150. Delta flights start at $151 while deals on United Airlines start at $154 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 $436). 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

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Alternative routes for Washington, D.C. to Idaho

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Washington, D.C. to Idaho

Discover the top 6 airlines that operate flights from Washington, D.C. to Idaho. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$229Average$327FlexibilityNo cancel feeOn-time65%
DeltaCheapest$310Average$541FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$336Average$731FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$340Average$539FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$366Average$543FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$407Average$665FlexibilityNo cancel feeOn-time71%
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