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$106+ Cheap flights from Dulles Intl (IAD) 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 5/14. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BOI
Apr 20 — Apr 271
Sun 4/20
Sun 4/27
1 adult, Economy
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Cheap flight deals from Dulles Intl to Idaho

Keep the following information in mind while searching for Dulles Intl to Idaho flight deals. Data was last updated April 15, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$212
(Alaska Airlines)

One-way from

$106
(Alaska Airlines)

Popular in

December

Cheapest in

April

Average price

$321
Provider with most accurate pricing for Washington, D.C. (WAS)-Boise Air Term. Gowen Fld flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Boise Air Term. Gowen Fld flights.
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From Washington, D.C. Dulles Intl to Idaho
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One-way flight from Washington, D.C. Dulles Intl to Idaho
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Highest demand for flights based on searches. 13% potential increase in price ($69 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($23 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find flight deals from Dulles Intl to Idaho

Cheapest flights from Dulles Intl to Idaho
Explore the most affordable flight options available from Dulles Intl to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 15, 2025.

This Alaska Airlines deal was found by Cheapflights users on 4/15. 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.
Tue 4/296:30 amIAD - BOI
1 stop9h 17mAlaska Airlines
Sat 5/102:41 pmBOI - IAD
1 stop7h 17mAlaska Airlines
Deal found 4/15$212
This Alaska Airlines deal was found by Cheapflights users on 4/15. 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.
Tue 4/296:30 amIAD - GEG
1 stop9h 01mAlaska Airlines
Sat 5/101:25 pmGEG - IAD
1 stop7h 33mAlaska Airlines
Deal found 4/15$271
This Hawaiian Airlines deal was found by Cheapflights users on 4/15. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/205:14 pmIAD - GEG
1 stop9h 33mHawaiian Airlines
Sat 5/247:00 amGEG - IAD
1 stop8h 25mHawaiian Airlines
Deal found 4/15$296
This Delta deal was found by Cheapflights users on 4/15. 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.
Mon 6/27:45 amIAD - GEG
1 stop8h 08mDelta
Wed 6/1111:10 pmGEG - IAD
1 stop7h 02mDelta
Deal found 4/15$297
This Delta deal was found by Cheapflights users on 4/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/106:00 amIAD - BOI
1 stop8h 08mDelta
Tue 5/277:49 pmBOI - IAD
2 stops13h 27mDelta
Deal found 4/14$306
This Hawaiian Airlines deal was found by Cheapflights users on 4/15. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/156:30 amIAD - BOI
1 stop9h 31mHawaiian Airlines
Tue 5/208:59 pmBOI - IAD
1 stop8h 37mHawaiian Airlines
Deal found 4/15$329
This Southwest deal was found by Cheapflights users on 4/14. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/44:10 pmIAD - BOI
1 stop7h 00mSouthwest
Tue 7/157:30 amBOI - IAD
1 stop7h 20mSouthwest
Deal found 4/14$351
This Trip.com deal was found by Cheapflights users on 4/13. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/97:45 amIAD - BOI
2 stops18h 05mMultiple Airlines
Wed 5/142:41 pmBOI - IAD
1 stop7h 17mMultiple Airlines
Deal found 4/13$369
This American Airlines deal was found by Cheapflights users on 4/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/46:36 amIAD - BOI
1 stop7h 56mAmerican Airlines
Sat 1/107:32 amBOI - IAD
1 stop6h 35mAmerican Airlines
Deal found 4/14$371
This Southwest deal was found by Cheapflights users on 4/15. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/105:50 pmIAD - GEG
1 stop8h 10mSouthwest
Thu 7/175:40 amGEG - IAD
2 stops14h 50mSouthwest
Deal found 4/15$379
This Delta deal was found by Cheapflights users on 4/13. 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 5/137:30 amIAD - IDA
1 stop6h 20mDelta
Sat 5/1712:55 pmIDA - IAD
1 stop8h 58mDelta
Deal found 4/13$395
This American Airlines deal was found by Cheapflights users on 4/15. 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 7/196:44 pmIAD - GEG
1 stop7h 33mAmerican Airlines
Sat 7/2612:30 pmGEG - IAD
1 stop7h 20mAmerican Airlines
Deal found 4/15$419

Cheapflights Fare Finder

Customize your flight search to find flights from Dulles Intl 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 April 15, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Idaho that are best for you.

Fly from

Dulles Intl

Fly to

Idaho

Route

Depart

Return

Price

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Tue 4/29

6:30 am-1:47 pm

1 stop9h 17m

Boise Air Term. Gowen Fld

Sat 5/10

2:41 pm-11:58 pm

1 stop7h 17m

$212

Washington, D.C.Spokane

IAD - GEG

IADGEG

Washington, D.C. Dulles Intl

Tue 4/29

7:00 am-1:33 pm

1 stop9h 33m

Spokane

Tue 5/6

11:30 am-11:58 pm

1 stop9h 28m

$271

Washington, D.C.Spokane

IAD - GEG

IADGEG

Washington, D.C. Dulles Intl

Tue 5/20

5:14 pm-11:47 pm

1 stop9h 33m

Spokane

Sat 5/24

7:00 am-6:25 pm

1 stop8h 25m

$296

Washington, D.C.Spokane

IAD - GEG

IADGEG

Washington, D.C. Dulles Intl

Mon 6/2

7:45 am-12:53 pm

1 stop8h 08m

Spokane

Wed 6/11

11:10 pm-9:12 am

1 stop7h 02m

$297

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Sat 5/10

6:00 am-12:08 pm

1 stop8h 08m

Boise Air Term. Gowen Fld

Tue 5/27

7:49 pm-11:16 am

2 stops13h 27m

$306

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Thu 5/15

6:30 am-2:01 pm

1 stop9h 31m

Boise Air Term. Gowen Fld

Tue 5/20

8:59 pm-7:36 am

1 stop8h 37m

$329

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Fri 7/4

4:10 pm-9:10 pm

1 stop7h 00m

Boise Air Term. Gowen Fld

Tue 7/15

7:30 am-4:50 pm

1 stop7h 20m

$351

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Fri 5/9

7:45 am-11:50 pm

2 stops18h 05m

Boise Air Term. Gowen Fld

Wed 5/14

2:41 pm-11:58 pm

1 stop7h 17m

$369

Washington, D.C.Spokane

IAD - GEG

IADGEG

Washington, D.C. Dulles Intl

Thu 7/10

5:50 pm-11:00 pm

1 stop8h 10m

Spokane

Thu 7/17

5:40 am-11:30 pm

2 stops14h 50m

$379

Washington, D.C.Idaho Falls

IAD - IDA

IADIDA

Washington, D.C. Dulles Intl

Sun 8/31

7:07 am-12:11 pm

1 stop7h 04m

Idaho Falls Fanning Field

Thu 9/4

7:34 am-4:18 pm

1 stop6h 44m

$395

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/14

Showing 1-10 of 54 results
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Best time to book a flight from Dulles Intl to Idaho

Have a flexible travel schedule? Discover the best time to fly to Idaho from Dulles Intl 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. Dulles Intl Airport to Idaho

What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Idaho?

Currently, October is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Idaho (average of $314). Flying from Washington, D.C. Dulles Intl Airport to Idaho in June is currently the most expensive (average of $419). 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 IAD to ID?

Find hourly flight availability from Dulles Intl 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 April 15, 2025.

When flying from Washington, D.C. Dulles Intl Airport 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 April 15, 2025.
Read through reviews of airlines operating flights from Washington, D.C. to Idaho, such as Alaska Airlines, Southwest and Delta. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,871 reviews

Food

7.1

Crew

8.5

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Alaska Airlines
8.0
Very good
9,871 reviews
Alaska Airlines
8.0
Very good
9,871 reviews

Food

7.1

Crew

8.5

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Southwest
8.0
Very good
4,279 reviews
Alaska Airlines
8.0
Very good
9,871 reviews

Food

7.1

Crew

8.5

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Delta
8.0
Very good
7,918 reviews
Alaska Airlines
8.0
Very good
9,871 reviews

Food

7.1

Crew

8.5

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Hawaiian Airlines
7.9
Good
2,375 reviews
Alaska Airlines
8.0
Very good
9,871 reviews

Food

7.1

Crew

8.5

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
United Airlines
7.4
Good
8,658 reviews
Alaska Airlines
8.0
Very good
9,871 reviews

Food

7.1

Crew

8.5

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl 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. Dulles Intl Airport to Idaho one-way?

    One-way options have recently been found by users for as low as $106 on Alaska Airlines. Other airlines that offer cheap prices include Delta from $149 and Hawaiian Airlines from $150 one-way.

  • What are the most popular routes from Washington, D.C. Dulles Intl Airport to Idaho?

    The most popular flight routes from Washington, D.C. Dulles Intl Airport to Idaho are Washington, D.C. Dulles Intl - Jackson Hole, Washington, D.C. Dulles Intl - Boise Air Term. Gowen Fld and Washington, D.C. Dulles Intl - Spokane.

  • Can I find deals for flights from Dulles Intl to Idaho that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Idaho flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Idaho?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Idaho.

  • Can I find deals for business class flights from Dulles Intl to Idaho?

    Yes. Cheapflights offers flight deals from Dulles Intl 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. Dulles Intl Airport to Idaho?

    Currently, October is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Idaho (average of $314). Flying from Washington, D.C. Dulles Intl Airport to Idaho in June is currently the most expensive (average of $419). 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.

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Alternative routes for Dulles Intl to Idaho

See prices for flight routes from nearby airports that may be better suited for you.
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Baltimore to Atlanta flights
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Reagan-National to Tampa flights
Reagan-National to Fort Lauderdale flights
Dulles Intl to Charleston flights
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Dulles Intl to Portland flights
Dulles Intl to Austin flights

Top 4 airlines flying from Dulles Intl to Idaho

Discover the top 4 airlines that operate flights from Dulles Intl 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 April 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$230Average$578FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$274Average$651FlexibilityNo cancel feeOn-time63%
DeltaCheapest$310Average$542FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$336Average$621FlexibilityNo cancel feeOn-time69%

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