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$129+ Cheap flights from Dulles Intl (IAD) to Boise (BOI)

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 2/11. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BOI
Feb 19 — Feb 261
Thu 2/19
Thu 2/26
1 adult, Economy
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Cheap flight deals from Dulles Intl to Boise

Cheapest flights from Dulles Intl to Boise
Explore the most affordable flight options available from Dulles Intl to Boise. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 20, 2026.

This Delta deal was found by Cheapflights users on 1/20. 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 4/77:18 am
IAD
-
BOI
1 stop7h 35m
Delta
Tue 4/141:51 pm
BOI
-
IAD
1 stop8h 00m
Delta
Deal found 1/20$257
This American Airlines deal was found by Cheapflights users on 1/20. 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 2/176:00 am
IAD
-
BOI
1 stop8h 42m
American Airlines
Tue 2/241:35 pm
BOI
-
IAD
1 stop7h 18m
American Airlines
Deal found 1/20$271
This Delta deal was found by Cheapflights users on 1/20. 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 2/1712:38 pm
IAD
-
BOI
2 stops11h 18m
Delta
Tue 2/241:51 pm
BOI
-
IAD
1 stop7h 19m
Delta
Deal found 1/20$303
This Alaska Airlines deal was found by Cheapflights users on 1/19. 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 2/177:05 am
IAD
-
BOI
1 stop17h 35m
Alaska Airlines
Mon 2/236:00 pm
BOI
-
IAD
1 stop9h 40m
Alaska Airlines
Deal found 1/19$307
This Alaska Airlines deal was found by Cheapflights users on 1/19. 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.
Thu 2/267:05 am
IAD
-
BOI
1 stop17h 35m
Alaska Airlines
Mon 3/23:47 pm
BOI
-
IAD
1 stop23h 33m
Alaska Airlines
Deal found 1/19$317
This Delta deal was found by Cheapflights users on 1/20. 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 4/77:00 am
IAD
-
BOI
1 stop8h 05m
Delta
Thu 4/1611:36 pm
BOI
-
IAD
1 stop7h 39m
Delta
Deal found 1/20$321
This Alaska Airlines deal was found by Cheapflights users on 1/20. 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 4/289:00 am
IAD
-
BOI
1 stop8h 33m
Alaska Airlines
Thu 5/76:05 pm
BOI
-
IAD
1 stop9h 45m
Alaska Airlines
Deal found 1/20$324
This American Airlines deal was found by Cheapflights users on 1/18. 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 2/186:00 am
IAD
-
BOI
1 stop8h 48m
American Airlines
Mon 2/236:33 pm
BOI
-
IAD
2 stops14h 27m
American Airlines
Deal found 1/18$328
This Southwest deal was found by Cheapflights users on 1/18. 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 2/273:25 pm
IAD
-
BOI
2 stops11h 35m
Southwest
Wed 3/41:30 pm
BOI
-
IAD
1 stop6h 25m
Southwest
Deal found 1/18$329
This Delta deal was found by Cheapflights users on 1/20. 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.
Sun 4/57:20 am
IAD
-
BOI
1 stop7h 33m
Delta
Tue 4/142:10 pm
BOI
-
IAD
1 stop8h 18m
Delta
Deal found 1/20$334

Find flight deals from Dulles Intl to Boise

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Boise (BOI). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 20, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$257
(Delta)

One-way from

$129
(Delta)

Popular in

February

Cheapest in

November

Average price

$420
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Boise Air Term. Gowen Fld flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Boise Air Term. Gowen Fld flights.
Search Deals
From Washington, D.C. Dulles Intl to Boise Air Term. Gowen Fld
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Boise Air Term. Gowen Fld
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($60 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($12 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 Dulles Intl to Boise 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 20, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Boise that are best for you.

Fly from

Dulles Intl

Fly to

Boise

Route

Depart

Return

Price

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Tue 2/17

12:38 pm-9:56 pm

2 stops11h 18m

Boise Air Term. Gowen Fld

Tue 2/24

1:51 pm-11:10 pm

1 stop7h 19m

$303

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Fri 2/27

6:27 pm-11:59 pm

1 stop31h 32m

Boise Air Term. Gowen Fld

Wed 3/4

1:00 pm-5:20 pm

1 stop26h 20m

$317

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Tue 4/28

7:00 am-4:15 pm

1 stop11h 15m

Boise Air Term. Gowen Fld

Thu 5/7

11:30 pm-9:10 am

1 stop7h 40m

$321

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Fri 3/13

4:10 pm-11:57 pm

1 stop9h 47m

Boise Air Term. Gowen Fld

Wed 3/18

2:40 pm-11:20 pm

1 stop6h 40m

$346

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Fri 5/1

6:00 am-2:04 pm

1 stop10h 04m

Boise Air Term. Gowen Fld

Wed 5/6

12:57 pm-11:44 pm

1 stop8h 47m

$358

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Wed 2/11

7:30 am-4:17 pm

1 stop10h 47m

Boise Air Term. Gowen Fld

Sun 2/15

10:41 am-11:10 pm

1 stop10h 29m

$358

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Wed 5/13

7:10 am-2:22 pm

1 stop9h 12m

Boise Air Term. Gowen Fld

Mon 5/18

11:30 pm-9:10 am

1 stop7h 40m

$362

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Sat 5/9

5:50 am-2:10 pm

2 stops10h 20m

Boise Air Term. Gowen Fld

Mon 5/11

5:30 am-5:05 pm

1 stop9h 35m

$390

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Fri 5/29

6:35 am-1:30 pm

1 stop8h 55m

Boise Air Term. Gowen Fld

Thu 6/11

2:11 pm-12:50 am

1 stop8h 39m

$391

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Tue 6/9

4:45 pm-12:30 am

1 stop9h 45m

Boise Air Term. Gowen Fld

Tue 6/16

5:30 am-5:05 pm

1 stop9h 35m

$391

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/19

Showing 1-10 of 22 results
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Compare providers for flights from Dulles Intl to Boise

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dulles Intl to Boise in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Boise flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Dulles Intl Airport-Boise flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Boise flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Boise flights, Cheapflights users trust Expedia the most. Expedia has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C. Dulles Intl Airport-Boise flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Dulles Intl to Boise

Have a flexible travel schedule? Discover the best time to fly to Boise 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 Boise

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

Currently, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Boise (average of $207). Flying from Washington, D.C. Dulles Intl Airport to Boise in March is currently the most expensive (average of $378). 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.

Reviews of airlines servicing Boise

Get insights into the airlines that provide service to Boise. 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 Boise. Reviews last updated January 20, 2026.
Get a feel of what it's like to fly with Alaska Airlines, Southwest, and Delta from Washington, D.C. Dulles Intl Airport to Boise by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,760 reviews

Crew

8.5

Food

7.1

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

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
11,760 reviews
Alaska Airlines
8.0
Very good
11,760 reviews

Crew

8.5

Food

7.1

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

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
11,760 reviews

Crew

8.5

Food

7.1

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

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
8,080 reviews
Alaska Airlines
8.0
Very good
11,760 reviews

Crew

8.5

Food

7.1

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

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
9,183 reviews
Alaska Airlines
8.0
Very good
11,760 reviews

Crew

8.5

Food

7.1

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

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 Dulles Intl to Boise. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Boise from Washington, D.C. Dulles Intl?

    Most people fly into Boise Air Term. Gowen Fld (BOI) if they book a flight to Boise from Washington, D.C. Dulles Intl. On average, Air Term. Gowen Fld has 0 inbound flights from Washington, D.C. Dulles Intl per day from 4 airlines. Boise Air Term. Gowen Fld is conveniently located just 3.3 mi from Boise’s city center.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to Boise?

    A quick flight from Washington, D.C. Dulles Intl Airport to Boise can take about 9h 47m. Delta provides one of the quickest options available for as low as $346. There are 2019 mi between Washington, D.C. Dulles Intl Airport and Boise. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to Boise round-trip?

    Flying on Alaska Airlines is currently your cheapest option to Boise, with prices starting at $182. Additional round-trip tickets that might be worth considering are offered by Delta and United Airlines, with the lowest prices starting at $227 and $278, respectively. Users have found that Alaska Airlines is 57% cheaper than the other options available to this destination.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Dulles Intl to Boise 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 Boise?

    Currently, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Boise (average of $207). Flying from Washington, D.C. Dulles Intl Airport to Boise in March is currently the most expensive (average of $378). 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

Traveling to a place near Boise?

Book flights to Boise if you plan to visit one of these locations
Ontario
Meridian
Nampa
Caldwell
McCall

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Alternative routes for Dulles Intl to Boise

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Dulles Intl to Boise

Discover the top 4 airlines that operate flights from Dulles Intl to Boise. 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 20, 2026.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$182Average$418FlexibilityNo cancel feeOn-time75%
DeltaCheapest$227Average$342FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$278Average$496FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$429Average$532FlexibilityNo cancel feeOn-time63%

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