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$100+ 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 7/30. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BOI
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$284
(Hawaiian Airlines)

One-way from

$100
(American Airlines)

Popular in

December

Cheapest in

April

Average price

$442
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. 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 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 June 12, 2025.

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 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 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 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 8/273:26 pmIAD - BOI
2 stops9h 34mDelta
Sun 8/316:00 amBOI - IAD
2 stops10h 49mDelta
Deal found 6/10$295
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.
Thu 9/257:00 amIAD - GEG
1 stop8h 43mHawaiian Airlines
Fri 9/267:44 pmGEG - IAD
1 stop8h 48mHawaiian Airlines
Deal found 6/10$297
This Alaska Airlines deal was found by Cheapflights users on 6/12. 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 7/85:25 pmIAD - GEG
1 stop9h 19mAlaska Airlines
Tue 7/224:47 pmGEG - IAD
1 stop11h 03mAlaska Airlines
Deal found 6/12$298
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/106:30 amIAD - GEG
1 stop9h 05mUnited Airlines
Mon 7/146:25 pmGEG - IAD
1 stop7h 59mUnited Airlines
Deal found 6/10$300
This Sun Country Air 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 Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/176:05 amIAD - BOI
1 stop12h 27mSun Country Air
Sun 7/207:38 pmBOI - IAD
1 stop14h 05mSun Country Air
Deal found 6/10$305
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 10/157:00 amIAD - GEG
1 stop9h 03mDelta
Mon 10/201:00 pmGEG - IAD
1 stop7h 15mDelta
Deal found 6/11$309
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.
Wed 7/98:10 amIAD - BOI
1 stop10h 54mAlaska Airlines
Wed 7/97:12 pmBOI - IAD
1 stop10h 15mAlaska Airlines
Deal found 6/10$313
This Sun Country Air 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 Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/612:34 pmIAD - GEG
1 stop6h 55mSun Country Air
Sun 7/136:29 pmGEG - IAD
1 stop14h 14mSun Country Air
Deal found 6/9$335
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 9/92:25 pmIAD - GEG
2 stops10h 40mSouthwest
Sat 9/139:10 amGEG - IAD
2 stops10h 40mSouthwest
Deal found 6/11$338

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 June 12, 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 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

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

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

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Wed 8/27

3:26 pm-11:00 pm

2 stops9h 34m

Boise Air Term. Gowen Fld

Sun 8/31

6:00 am-6:49 pm

2 stops10h 49m

$295

Washington, D.C.Spokane

IAD - GEG

IADGEG

Washington, D.C. Dulles Intl

Thu 9/25

7:00 am-12:43 pm

1 stop8h 43m

Spokane

Fri 9/26

7:44 pm-7:32 am

1 stop8h 48m

$297

Washington, D.C.Spokane

IAD - GEG

IADGEG

Washington, D.C. Dulles Intl

Tue 7/8

5:25 pm-11:44 pm

1 stop9h 19m

Spokane

Tue 7/22

4:47 pm-6:50 am

1 stop11h 03m

$298

Washington, D.C.Spokane

IAD - GEG

IADGEG

Washington, D.C. Dulles Intl

Thu 7/10

6:30 am-12:35 pm

1 stop9h 05m

Spokane

Mon 7/14

6:25 pm-5:24 am

1 stop7h 59m

$300

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Thu 7/17

6:05 am-4:32 pm

1 stop12h 27m

Boise Air Term. Gowen Fld

Sun 7/20

7:38 pm-11:43 am

1 stop14h 05m

$305

Washington, D.C.Spokane

IAD - GEG

IADGEG

Washington, D.C. Dulles Intl

Wed 10/15

7:00 am-1:03 pm

1 stop9h 03m

Spokane

Mon 10/20

1:00 pm-11:15 pm

1 stop7h 15m

$309

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Wed 7/9

8:10 am-5:04 pm

1 stop10h 54m

Boise Air Term. Gowen Fld

Wed 7/9

7:12 pm-7:27 am

1 stop10h 15m

$313

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 60 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 $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 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 June 12, 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 June 12, 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
10,000 reviews

Overall

8.0

Entertainment

7.1

Comfort

7.8

Food

7.1

Boarding

8.1

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

Overall

8.0

Entertainment

7.1

Comfort

7.8

Food

7.1

Boarding

8.1

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

Overall

8.0

Entertainment

7.1

Comfort

7.8

Food

7.1

Boarding

8.1

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
7,946 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Comfort

7.8

Food

7.1

Boarding

8.1

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

Overall

8.0

Entertainment

7.1

Comfort

7.8

Food

7.1

Boarding

8.1

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

Overall

8.0

Entertainment

7.1

Comfort

7.8

Food

7.1

Boarding

8.1

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 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 $100 on American Airlines. Other airlines that offer cheap prices include Alaska Airlines from $105 and United Airlines from $120 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 - Spokane and Washington, D.C. Dulles Intl - Boise Air Term. Gowen Fld.

  • 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 $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 Dulles Intl to Idaho

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Seattle flights
Dulles Intl to Los Angeles flights
Reagan-National to Los Angeles flights
Baltimore to Dallas/Fort Worth flights
Reagan-National to Seattle flights
Baltimore to Fort Lauderdale flights
Baltimore to Seattle flights
Reagan-National to Boston flights
Dulles Intl to Miami flights
Baltimore to Las Vegas flights
Reagan-National to Miami flights
Baltimore to Miami flights
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Reagan-National to O'Hare Intl flights
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Dulles Intl to Las Vegas flights
Dulles Intl to O'Hare Intl flights
Dulles Intl to Dallas/Fort Worth flights
Baltimore to Los Angeles flights
Reagan-National to Orlando flights
Baltimore to Denver flights
Dulles Intl to Atlanta flights
Baltimore to Hobby flights
Baltimore to Boston flights
Dulles Intl to Fort Lauderdale flights
Reagan-National to Las Vegas flights
Reagan-National to San Francisco flights
Dulles Intl to Orlando flights
Dulles Intl to Midway flights
Baltimore to Orlando flights
Baltimore to San Francisco flights
Baltimore to Atlanta flights
Reagan-National to Atlanta flights
Reagan-National to Dallas/Fort Worth flights
Dulles Intl to Boston flights
Dulles Intl to Tampa flights
Dulles Intl to Denver flights
Dulles Intl to Hobby flights
Reagan-National to Fort Lauderdale flights
Dulles Intl to San Diego flights
Reagan-National to Denver flights
Dulles Intl to Honolulu flights
Reagan-National to Hobby flights
Reagan-National to San Diego flights
Baltimore to New Orleans flights
Dulles Intl to New Orleans flights
Baltimore to George Bush Intcntl flights
Reagan-National to Portland flights
Dulles Intl to Portland flights
Reagan-National to Minneapolis flights

Top 5 airlines flying from Dulles Intl to Idaho

Discover the top 5 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$230Average$527FlexibilityNo cancel feeOn-time75%
DeltaCheapest$263Average$596FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$293Average$422FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$326Average$657FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$428Average$588FlexibilityNo cancel feeOn-time63%

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