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$112+ 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 2/26. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — BOI
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Cheap 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 29, 2026.

This American Airlines deal was found by Cheapflights users on 1/29. 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.
Wed 8/1911:51 am
IAD
-
JAC
1 stop9h 43m
American Airlines
Wed 8/267:00 am
JAC
-
IAD
1 stop8h 14m
American Airlines
Deal found 1/29$249
This United Airlines deal was found by Cheapflights users on 1/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/254:10 pm
IAD
-
BOI
1 stop9h 28m
United Airlines
Wed 3/45:00 am
BOI
-
IAD
1 stop6h 05m
United Airlines
Deal found 1/27$257
This Delta deal was found by Cheapflights users on 1/29. 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 2/256:00 am
BWI
-
GEG
1 stop8h 35m
Delta
Wed 3/41:20 pm
GEG
-
BWI
1 stop7h 24m
Delta
Deal found 1/29$257
This Delta deal was found by Cheapflights users on 1/28. 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 2/256:00 am
BWI
-
BOI
1 stop8h 28m
Delta
Wed 3/41:43 pm
BOI
-
BWI
1 stop8h 52m
Delta
Deal found 1/28$257
This Alaska Airlines deal was found by Cheapflights users on 1/29. 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 4/217:00 am
IAD
-
GEG
1 stop9h 53m
Alaska Airlines
Tue 4/286:00 am
GEG
-
IAD
1 stop9h 20m
Alaska Airlines
Deal found 1/29$257
This Delta deal was found by Cheapflights users on 1/27. 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 2/2512:38 pm
IAD
-
BOI
2 stops11h 18m
Delta
Wed 3/45:20 am
BOI
-
IAD
1 stop6h 14m
Delta
Deal found 1/27$262
This Delta deal was found by Cheapflights users on 1/28. 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 2/252:58 pm
BWI
-
GEG
2 stops10h 52m
Delta
Tue 3/32:05 pm
GEG
-
BWI
1 stop6h 42m
Delta
Deal found 1/28$262
This Delta deal was found by Cheapflights users on 1/28. 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 2/256:05 am
BWI
-
BOI
2 stops12h 10m
Delta
Sat 3/71:43 pm
BOI
-
BWI
1 stop8h 52m
Delta
Deal found 1/28$262
This Delta deal was found by Cheapflights users on 1/27. 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 2/259:54 am
DCA
-
BOI
2 stops10h 28m
Delta
Wed 3/45:20 am
BOI
-
DCA
1 stop6h 04m
Delta
Deal found 1/27$262
This Delta deal was found by Cheapflights users on 1/29. 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 4/216:00 am
IAD
-
GEG
1 stop8h 41m
Delta
Tue 4/287:38 pm
GEG
-
IAD
2 stops11h 40m
Delta
Deal found 1/29$262
This United Airlines deal was found by Cheapflights users on 1/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/2510:30 am
BWI
-
BOI
2 stops12h 25m
United Airlines
Sat 2/282:40 pm
BOI
-
BWI
1 stop6h 45m
United Airlines
Deal found 1/28$269
This Alaska Airlines deal was found by Cheapflights users on 1/29. 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.
Mon 3/27:05 am
IAD
-
SUN
1 stop13h 17m
Alaska Airlines
Fri 3/67:04 pm
SUN
-
IAD
1 stop8h 36m
Alaska Airlines
Deal found 1/29$289

Find 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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$257
(United Airlines)

One-way from

$112
(Trip.com)

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
One-way flight from Washington, D.C. (WAS) to Idaho
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($74 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
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 29, 2026.
Use the filters below to find and compare flights from Washington, D.C. to Idaho that are best for you.

Fly from

Washington, D.C.

Fly to

Idaho

Route

Depart

Return

Price

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Wed 2/25

4:10 pm-11:38 pm

1 stop9h 28m

Boise Air Term. Gowen Fld

Wed 3/4

5:00 am-1:05 pm

1 stop6h 05m

$257

BaltimoreBoise

BWI - BOI

BWIBOI

Baltimore/Washington

Tue 3/3

7:05 am-12:09 pm

1 stop7h 04m

Boise Air Term. Gowen Fld

Sat 3/7

1:43 pm-12:35 am

1 stop8h 52m

$257

Washington, D.C.Spokane

IAD - GEG

IADGEG

Washington, D.C. Dulles Intl

Tue 4/21

7:00 am-1:53 pm

1 stop9h 53m

Spokane

Tue 4/28

6:00 am-6:20 pm

1 stop9h 20m

$257

BaltimoreBoise

BWI - BOI

BWIBOI

Baltimore/Washington

Wed 2/25

8:42 am-4:07 pm

1 stop9h 25m

Boise Air Term. Gowen Fld

Wed 3/4

2:40 pm-11:25 pm

1 stop6h 45m

$257

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Wed 2/25

12:38 pm-9:56 pm

2 stops11h 18m

Boise Air Term. Gowen Fld

Wed 3/4

5:20 am-1:34 pm

1 stop6h 14m

$262

BaltimoreSpokane

BWI - GEG

BWIGEG

Baltimore/Washington

Wed 2/25

2:58 pm-10:50 pm

2 stops10h 52m

Spokane

Tue 3/3

2:05 pm-11:47 pm

1 stop6h 42m

$262

BaltimoreBoise

BWI - BOI

BWIBOI

Baltimore/Washington

Wed 2/25

11:45 am-9:56 pm

2 stops12h 11m

Boise Air Term. Gowen Fld

Wed 3/4

1:43 pm-12:35 am

1 stop8h 52m

$262

Washington, D.C.Boise

DCA - BOI

DCABOI

Washington, D.C. Reagan-National

Wed 2/25

9:54 am-6:22 pm

2 stops10h 28m

Boise Air Term. Gowen Fld

Wed 3/4

5:20 am-1:24 pm

1 stop6h 04m

$262

Washington, D.C.Spokane

IAD - GEG

IADGEG

Washington, D.C. Dulles Intl

Tue 4/21

6:00 am-1:03 pm

2 stops10h 03m

Spokane

Tue 4/28

1:07 pm-11:55 pm

1 stop7h 48m

$262

BaltimoreBoise

BWI - BOI

BWIBOI

Baltimore/Washington

Tue 3/3

6:00 am-1:58 pm

2 stops9h 58m

Boise Air Term. Gowen Fld

Wed 3/4

8:50 am-11:47 pm

2 stops12h 57m

$268

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/29

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.

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 February is currently the most expensive (average of $301). 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.

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

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 29, 2026.
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
11,807 reviews

Boarding

8.1

Crew

8.5

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Alaska Airlines
8.0
Very good
11,807 reviews
Alaska Airlines
8.0
Very good
11,807 reviews

Boarding

8.1

Crew

8.5

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Southwest
8.0
Very good
4,267 reviews
Alaska Airlines
8.0
Very good
11,807 reviews

Boarding

8.1

Crew

8.5

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Delta
7.9
Good
8,128 reviews
Alaska Airlines
8.0
Very good
11,807 reviews

Boarding

8.1

Crew

8.5

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
United Airlines
7.4
Good
9,215 reviews
Alaska Airlines
8.0
Very good
11,807 reviews

Boarding

8.1

Crew

8.5

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
American Airlines
7.2
Good
11,205 reviews
Alaska Airlines
8.0
Very good
11,807 reviews

Boarding

8.1

Crew

8.5

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading

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?

    United Airlines, Delta, and Alaska Airlines can get you from Washington, D.C. to Idaho in just under 7h 59m. Your travel time can differ by up to 1h 54m. Airlines will cover a distance of 2105 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 United Airlines, which is currently one of the cheapest options available, starting at $118. Frontier flights start at $146 while deals on American Airlines start at $148 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 February is currently the most expensive (average of $301). 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 5 airlines flying from Washington, D.C. to Idaho

Discover the top 5 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 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$150Average$454FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$182Average$416FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$221Average$591FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$300Average$504FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$346Average$508FlexibilityNo cancel feeOn-time63%

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