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$105+ 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 5/20. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — BOI
Apr 24 — May 11
Fri 4/24
Fri 5/1
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 March 25, 2026.

This Frontier deal was found by Cheapflights users on 3/21. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/188:00 am
DCA
-
GEG
1 stop29h 49m
Frontier
Sun 4/2611:44 am
GEG
-
DCA
1 stop26h 15m
Frontier
Deal found 3/21$162
This United Airlines deal was found by Cheapflights users on 3/23. 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.
Tue 4/146:15 am
IAD
-
BOI
1 stop7h 34m
United Airlines
Tue 4/217:03 pm
BOI
-
IAD
1 stop8h 53m
United Airlines
Deal found 3/23$243
This American Airlines deal was found by Cheapflights users on 3/23. 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 4/216:58 am
DCA
-
GEG
1 stop8h 34m
American Airlines
Wed 4/221:22 pm
GEG
-
DCA
1 stop7h 35m
American Airlines
Deal found 3/23$243
This Delta deal was found by Cheapflights users on 3/24. 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 stop10h 04m
Delta
Tue 4/286:00 am
GEG
-
IAD
1 stop8h 57m
Delta
Deal found 3/24$243
This Delta deal was found by Cheapflights users on 3/23. 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 4/143:00 pm
IAD
-
BOI
1 stop9h 28m
Delta
Tue 4/218:40 pm
BOI
-
IAD
2 stops11h 38m
Delta
Deal found 3/23$248
This Delta deal was found by Cheapflights users on 3/23. 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 4/217:40 am
DCA
-
GEG
1 stop8h 24m
Delta
Wed 4/2210:40 pm
GEG
-
DCA
2 stops12h 14m
Delta
Deal found 3/23$248
This Delta deal was found by Cheapflights users on 3/23. 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 stop10h 04m
Delta
Wed 4/225:30 am
GEG
-
IAD
2 stops12h 22m
Delta
Deal found 3/23$248
This Southwest deal was found by Cheapflights users on 3/24. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/226:20 am
IAD
-
BOI
1 stop6h 35m
Southwest
Sat 4/252:50 pm
BOI
-
IAD
1 stop6h 05m
Southwest
Deal found 3/24$257
This United Airlines deal was found by Cheapflights users on 3/24. 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.
Tue 4/214:18 pm
BWI
-
GEG
1 stop7h 53m
United Airlines
Tue 4/281:46 pm
GEG
-
BWI
1 stop6h 38m
United Airlines
Deal found 3/24$257
This Delta deal was found by Cheapflights users on 3/24. 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 4/226:00 am
IAD
-
BOI
2 stops10h 26m
Delta
Sat 4/253:23 pm
BOI
-
IAD
1 stop6h 09m
Delta
Deal found 3/24$262
This Southwest deal was found by Cheapflights users on 3/24. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/212:50 pm
BWI
-
GEG
2 stops11h 05m
Southwest
Tue 4/281:45 pm
GEG
-
BWI
1 stop7h 05m
Southwest
Deal found 3/24$262
This Delta deal was found by Cheapflights users on 3/24. 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 4/215:37 pm
BWI
-
GEG
2 stops9h 43m
Delta
Tue 4/286:00 am
GEG
-
BWI
2 stops11h 17m
Delta
Deal found 3/24$267

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 March 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$162
(Frontier)

One-way from

$105
(Priceline)

Popular in

December

Cheapest in

April

Average price

$527
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. 11% potential increase in price ($55 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 25, 2026.
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

Cheapest round-trip

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Tue 5/5

11:04 am-12:17 am

2 stops15h 13m

Boise Air Term. Gowen Fld

Sat 5/16

1:53 pm-12:51 am

1 stop8h 58m

$276

BaltimoreBoise

BWI - BOI

BWIBOI

Baltimore/Washington

Wed 4/22

6:03 am-2:26 pm

2 stops10h 23m

Boise Air Term. Gowen Fld

Sat 4/25

12:52 pm-11:25 pm

1 stop8h 33m

$302

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Fri 5/29

6:00 am-1:18 pm

1 stop9h 18m

Boise Air Term. Gowen Fld

Thu 6/4

11:39 pm-9:16 am

1 stop7h 37m

$315

BaltimoreSpokane

BWI - GEG

BWIGEG

Baltimore/Washington

Tue 6/9

6:10 am-11:45 am

1 stop8h 35m

Spokane

Tue 6/9

2:55 pm-12:50 am

1 stop6h 55m

$328

BaltimoreBoise

BWI - BOI

BWIBOI

Baltimore/Washington

Sat 4/25

4:18 pm-9:34 pm

1 stop7h 16m

Boise Air Term. Gowen Fld

Mon 4/27

7:03 pm-6:00 am

1 stop8h 57m

$330

BaltimoreBoise

BWI - BOI

BWIBOI

Baltimore/Washington

Tue 5/5

6:25 pm-12:25 am

1 stop8h 00m

Boise Air Term. Gowen Fld

Tue 5/12

4:05 pm-5:40 am

1 stop11h 35m

$332
Quickest round-trip

BaltimoreSpokane

BWI - GEG

BWIGEG

Baltimore/Washington

Fri 5/29

6:59 pm-11:06 pm

1 stop7h 07m

Spokane

Mon 6/1

10:40 pm-9:23 am

1 stop7h 43m

$335

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Sat 5/23

6:08 am-12:43 pm

1 stop8h 35m

Boise Air Term. Gowen Fld

Wed 5/27

12:55 pm-12:51 am

2 stops9h 56m

$336

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Thu 4/16

3:00 pm-10:28 pm

1 stop9h 28m

Boise Air Term. Gowen Fld

Tue 4/21

8:40 pm-10:18 am

2 stops11h 38m

$342

Washington, D.C.Spokane

IAD - GEG

IADGEG

Washington, D.C. Dulles Intl

Thu 5/7

12:37 pm-11:35 pm

2 stops13h 58m

Spokane

Mon 5/11

7:23 pm-9:16 am

2 stops10h 53m

$355

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/21

Showing 1-10 of 60 resultsSorted by cheapest first
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6

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 November 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 March 25, 2026.
Read reviews from past customers who have flown Southwest,Alaska Airlines, andDelta from Washington, D.C. to Idaho. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,332 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,332 reviews
Southwest
8.0
Very good
4,332 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Alaska Airlines
7.9
Good
12,108 reviews
Southwest
8.0
Very good
4,332 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Delta
7.9
Good
8,327 reviews
Southwest
8.0
Very good
4,332 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,477 reviews
Southwest
8.0
Very good
4,332 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
American Airlines
7.1
Good
11,494 reviews
Southwest
8.0
Very good
4,332 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

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?

    Delta, Southwest, and United Airlines can get you from Washington, D.C. to Idaho in just under 7h 16m. Your travel time can differ by up to 7h 57m. Airlines will cover a distance of 2052 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 Frontier, which is currently one of the cheapest options available, starting at $111. United Airlines flights start at $118 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, Baltimore/Washington - Jackson Hole or Washington, D.C. Reagan-National - 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 November 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 March 25, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$150Average$457FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$182Average$436FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$221Average$598FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$256Average$476FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$300Average$517FlexibilityNo cancel feeOn-time71%

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