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$100+ 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 9/9. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — BOI
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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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 June 12, 2025.

Round-trip from

$199
(Southwest)

One-way from

$100
(Delta)

Popular in

December

Cheapest in

April

Average price

$442
From Washington, D.C. (WAS) to Idaho
Search Deals
One-way flight from Washington, D.C. (WAS) to Idaho
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Highest demand for flights based on searches. 19% potential increase in price ($105 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($26 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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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 June 12, 2025.

This Southwest deal was found by Cheapflights users on 6/11. 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 9/96:05 pmBWI - GEG
1 stop7h 25mSouthwest
Sat 9/136:25 amGEG - BWI
1 stop8h 45mSouthwest
Deal found 6/11$199
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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 9/167:00 amBWI - GEG
1 stop8h 43mAlaska Airlines
Thu 9/255:46 pmGEG - BWI
1 stop8h 47mAlaska Airlines
Deal found 6/10$210
This Mytrip deal was found by Cheapflights users on 6/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/78:54 amBWI - GEG
2 stops35h 08mMultiple Airlines
Mon 8/115:52 pmGEG - BWI
1 stop8h 41mMultiple Airlines
Deal found 6/10$277
This Hawaiian Airlines deal was found by Cheapflights users on 6/9. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/217:00 amBWI - GEG
1 stop8h 43mHawaiian Airlines
Fri 9/264:35 pmGEG - BWI
1 stop9h 58mHawaiian Airlines
Deal found 6/9$278
This Hawaiian Airlines deal was found by Cheapflights users on 6/10. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/97:00 amIAD - BOI
1 stop10h 00mHawaiian Airlines
Tue 9/167:17 pmBOI - IAD
1 stop10h 15mHawaiian Airlines
Deal found 6/10$284
This Hawaiian Airlines deal was found by Cheapflights users on 6/11. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/268:00 amDCA - BOI
1 stop9h 00mHawaiian Airlines
Wed 8/276:00 amBOI - DCA
1 stop8h 06mHawaiian Airlines
Deal found 6/11$284
This American Airlines deal was found by Cheapflights users on 6/11. 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 8/166:27 amIAD - BOI
1 stop8h 19mAmerican Airlines
Tue 8/197:00 amBOI - IAD
1 stop9h 56mAmerican Airlines
Deal found 6/11$285
This Delta deal was found by Cheapflights users on 6/11. 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 8/64:59 pmDCA - BOI
1 stop9h 04mDelta
Wed 8/136:00 amBOI - DCA
1 stop8h 10mDelta
Deal found 6/11$285
This United Airlines deal was found by Cheapflights users on 6/11. 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.
Mon 8/255:47 pmIAD - BOI
1 stop6h 34mUnited Airlines
Tue 8/267:45 amBOI - IAD
1 stop9h 07mUnited Airlines
Deal found 6/11$286
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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 9/97:00 amBWI - BOI
1 stop10h 00mAlaska Airlines
Tue 9/164:34 pmBOI - BWI
1 stop10h 59mAlaska Airlines
Deal found 6/10$287
This FlightHub deal was found by Cheapflights users on 6/11. 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.
Mon 9/158:00 amBWI - BOI
1 stop14h 44mSpirit Airlines
Fri 9/199:49 pmBOI - BWI
1 stop24h 21mSpirit Airlines
Deal found 6/11$291
This Delta deal was found by Cheapflights users on 6/10. 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 8/276:00 amBWI - BOI
2 stops10h 01mDelta
Sun 8/3112:45 pmBOI - BWI
1 stop9h 11mDelta
Deal found 6/10$292

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 June 12, 2025.
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

BaltimoreSpokane

BWI - GEG

BWIGEG

Baltimore/Washington

Tue 9/9

6:05 pm-10:30 pm

1 stop7h 25m

Spokane

Sat 9/13

6:25 am-6:10 pm

1 stop8h 45m

$199

BaltimoreSpokane

BWI - GEG

BWIGEG

Baltimore/Washington

Tue 9/16

7:00 am-12:43 pm

1 stop8h 43m

Spokane

Thu 9/25

5:46 pm-5:33 am

1 stop8h 47m

$210

BaltimoreSpokane

BWI - GEG

BWIGEG

Baltimore/Washington

Thu 8/7

8:54 am-5:02 pm

2 stops35h 08m

Spokane

Mon 8/11

5:52 pm-5:33 am

1 stop8h 41m

$277

BaltimoreSpokane

BWI - GEG

BWIGEG

Baltimore/Washington

Sun 9/21

7:00 am-12:43 pm

1 stop8h 43m

Spokane

Fri 9/26

4:35 pm-5:33 am

1 stop9h 58m

$278

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Tue 9/9

7:00 am-3:00 pm

1 stop10h 00m

Boise Air Term. Gowen Fld

Tue 9/16

7:17 pm-7:32 am

1 stop10h 15m

$284

Washington, D.C.Boise

DCA - BOI

DCABOI

Washington, D.C. Reagan-National

Tue 8/26

8:00 am-3:00 pm

1 stop9h 00m

Boise Air Term. Gowen Fld

Wed 8/27

6:00 am-4:06 pm

1 stop8h 06m

$284

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Sat 8/16

6:27 am-12:46 pm

1 stop8h 19m

Boise Air Term. Gowen Fld

Tue 8/19

7:00 am-6:56 pm

1 stop9h 56m

$285

Washington, D.C.Boise

DCA - BOI

DCABOI

Washington, D.C. Reagan-National

Wed 8/6

4:59 pm-12:03 am

1 stop9h 04m

Boise Air Term. Gowen Fld

Wed 8/13

6:00 am-4:10 pm

1 stop8h 10m

$285

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Mon 8/25

5:47 pm-10:21 pm

1 stop6h 34m

Boise Air Term. Gowen Fld

Tue 8/26

7:45 am-6:52 pm

1 stop9h 07m

$286

BaltimoreBoise

BWI - BOI

BWIBOI

Baltimore/Washington

Tue 9/9

7:00 am-3:00 pm

1 stop10h 00m

Boise Air Term. Gowen Fld

Tue 9/16

4:34 pm-5:33 am

1 stop10h 59m

$287

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

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, 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 $395). 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 June 12, 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 June 12, 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 Delta, which is currently one of the cheapest options available, starting at $100. American Airlines flights start at $100 while deals on Alaska Airlines start at $105 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 $395). 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$230Average$527FlexibilityNo cancel feeOn-time75%
DeltaCheapest$230Average$502FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$278Average$670FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$293Average$600FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$347Average$538FlexibilityNo cancel feeOn-time63%

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