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Dulles Intl

$140+ Cheap flights from Boise (BOI) to Dulles Intl (IAD)

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 1/1. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — IAD
Nov 5 — Nov 121
Wed 11/5
Wed 11/12
1 adult, Economy
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Cheap flight deals from Boise to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Boise (BOI) to Dulles Intl (IAD). 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 October 6, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$301
(United Airlines)

One-way from

$140
(Alaska Airlines)

Popular in

December

Cheapest in

February

Average price

$488
Provider with most accurate pricing for Boise Air Term. Gowen Fld-Washington, D.C. Dulles Intl flight deals.
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Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-Washington, D.C. Dulles Intl flights.
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From Boise Air Term. Gowen Fld to Washington, D.C. Dulles Intl
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One-way flight from Boise Air Term. Gowen Fld to Washington, D.C. Dulles Intl
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Highest demand for flights based on searches. 12% potential increase in price ($68 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($25 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Boise to Dulles Intl

Cheapest flights from Boise to Dulles Intl
Explore the most affordable flight options available from Boise to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 6, 2025.

This Delta deal was found by Cheapflights users on 10/6. 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.
Fri 10/311:39 pmBOI - IAD
1 stop7h 39mDelta
Wed 11/57:35 amIAD - BOI
1 stop10h 31mDelta
Deal found 10/6$301
This Delta deal was found by Cheapflights users on 10/6. 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.
Fri 10/312:00 pmBOI - IAD
1 stop8h 40mDelta
Tue 11/43:33 pmIAD - BOI
2 stops10h 26mDelta
Deal found 10/6$306
This KAYAK deal was found by Cheapflights users on 10/3. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/206:28 amBOI - IAD
1 stop8h 12mAlaska Airlines
Thu 11/277:38 amIAD - BOI
1 stop9h 56mAlaska Airlines
Deal found 10/3$315
This Delta deal was found by Cheapflights users on 10/6. 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.
Fri 10/312:00 pmBOI - IAD
1 stop8h 40mDelta
Thu 11/67:35 amIAD - BOI
1 stop10h 31mDelta
Deal found 10/6$316
This Alaska Airlines deal was found by Cheapflights users on 10/6. 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 10/297:45 pmBOI - IAD
1 stop19h 28mAlaska Airlines
Sat 11/17:43 amIAD - BOI
1 stop10h 34mAlaska Airlines
Deal found 10/6$320
This Delta deal was found by Cheapflights users on 10/6. 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 11/12:00 pmBOI - IAD
1 stop8h 40mDelta
Sat 11/87:35 amIAD - BOI
1 stop10h 31mDelta
Deal found 10/6$321
This Delta deal was found by Cheapflights users on 10/6. 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 11/11:00 pmBOI - IAD
1 stop8h 33mDelta
Thu 11/67:35 amIAD - BOI
1 stop18h 33mDelta
Deal found 10/6$324
This Delta deal was found by Cheapflights users on 10/6. 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 10/299:00 amBOI - IAD
2 stops12h 00mDelta
Sat 11/16:18 amIAD - BOI
1 stop9h 44mDelta
Deal found 10/6$326
This Delta deal was found by Cheapflights users on 10/6. 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.
Thu 11/62:00 pmBOI - IAD
1 stop8h 40mDelta
Sun 11/97:15 amIAD - BOI
1 stop10h 50mDelta
Deal found 10/6$327
This Delta deal was found by Cheapflights users on 10/5. 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 11/811:41 amBOI - IAD
2 stops9h 52mDelta
Fri 11/147:15 amIAD - BOI
1 stop10h 50mDelta
Deal found 10/5$332

Cheapflights Fare Finder

 
Customize your flight search to find flights from Boise to Dulles Intl 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 October 6, 2025.
Use the filters below to find and compare flights from Boise to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Boise

Fly to

Dulles Intl

Route

Depart

Return

Price

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Fri 10/31

1:39 pm-11:18 pm

1 stop7h 39m

Washington, D.C. Dulles Intl

Wed 11/5

7:35 am-4:06 pm

1 stop10h 31m

$301

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Fri 10/31

1:00 pm-11:33 pm

1 stop8h 33m

Washington, D.C. Dulles Intl

Sat 11/8

12:27 pm-7:13 pm

2 stops8h 46m

$306

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Wed 11/12

7:01 am-5:13 pm

1 stop8h 12m

Washington, D.C. Dulles Intl

Tue 11/18

7:43 am-4:17 pm

1 stop10h 34m

$320

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Wed 11/12

6:05 pm-6:23 am

1 stop10h 18m

Washington, D.C. Dulles Intl

Wed 11/19

5:40 pm-11:33 am

1 stop19h 53m

$320

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Wed 10/29

6:05 pm-6:23 am

1 stop10h 18m

Washington, D.C. Dulles Intl

Sat 11/1

7:43 am-3:12 pm

1 stop9h 29m

$320

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Sat 11/1

2:00 pm-12:40 am

1 stop8h 40m

Washington, D.C. Dulles Intl

Sat 11/8

7:35 am-4:06 pm

1 stop10h 31m

$321

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Thu 11/6

11:41 am-12:40 am

1 stop10h 59m

Washington, D.C. Dulles Intl

Tue 11/11

6:00 am-12:39 pm

1 stop8h 39m

$324

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Wed 11/12

9:00 am-11:03 pm

2 stops12h 03m

Washington, D.C. Dulles Intl

Tue 11/18

7:15 am-4:05 pm

1 stop10h 50m

$326

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Wed 10/29

11:12 am-11:39 pm

2 stops10h 27m

Washington, D.C. Dulles Intl

Sat 11/1

7:35 am-4:22 pm

1 stop10h 47m

$326

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Thu 11/13

8:50 am-4:40 pm

1 stop29h 50m

Washington, D.C. Dulles Intl

Tue 11/18

7:43 am-3:12 pm

1 stop9h 29m

$327

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/6

Showing 1-10 of 21 results
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Compare providers for flights from Boise to Dulles Intl

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 Boise to Dulles Intl in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*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 Boise-Washington, D.C. Dulles Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Boise-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Boise-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Boise-Washington, D.C. Dulles Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub 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 Boise-Washington, D.C. Dulles Intl Airport 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 Boise to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Boise 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 Boise to Washington, D.C. Dulles Intl Airport

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

Currently, April is the cheapest month in which you can book a flight from Boise to Washington, D.C. Dulles Intl Airport (average of $141). Flying from Boise to Washington, D.C. Dulles Intl Airport in December is currently the most expensive (average of $498). 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 BOI to IAD?

Find hourly flight availability from Boise to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 6, 2025.

It’s typically best to fly out from Boise to Washington, D.C. Dulles Intl Airport in the evening. Doing so could potentially save you 13% on the flight price compared to flying in the afternoon, which is usually more expensive.

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. 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 Dulles Intl. Reviews last updated October 6, 2025.
See what other customers who have flown with Alaska Airlines, Southwest, and Delta from Boise to Washington, D.C. Dulles Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,027 reviews

Entertainment

7.0

Comfort

7.8

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Alaska Airlines
8.0
Very good
11,027 reviews
Alaska Airlines
8.0
Very good
11,027 reviews

Entertainment

7.0

Comfort

7.8

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Southwest
8.0
Very good
4,232 reviews
Alaska Airlines
8.0
Very good
11,027 reviews

Entertainment

7.0

Comfort

7.8

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Delta
8.0
Very good
7,967 reviews
Alaska Airlines
8.0
Very good
11,027 reviews

Entertainment

7.0

Comfort

7.8

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
United Airlines
7.4
Good
8,957 reviews
Alaska Airlines
8.0
Very good
11,027 reviews

Entertainment

7.0

Comfort

7.8

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.

Related info for your journey

Find useful and relevant information for your journey from Boise to Dulles Intl. 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 from for flights from Boise to Washington, D.C. Dulles Intl?

    Located just 3.3 mi from the city center, Boise Air Term. Gowen Fld is the airport most travelers will use when flying to Washington, D.C. Dulles Intl from Boise. Booking flights from Air Term. Gowen Fld (BOI) to Washington, D.C. Dulles Intl should be relatively easy as there are 0 daily outbound flights to Washington, D.C. Dulles Intl from 4 different airlines.

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

    Airlines like Delta and Alaska Airlines fly from Boise to Washington, D.C. Dulles Intl Airport in about 7h 39m. The time it takes to get you to your destination can typically vary by up to 33m. There are 2019 mi between Boise and Washington, D.C. Dulles Intl Airport. This flight may include one or multiple stops.

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

    Flying on Alaska Airlines is currently your cheapest option to Washington, D.C. Dulles Intl Airport, with prices starting at $141. Additional round-trip tickets that might be worth considering are offered by United Airlines and Delta, with the lowest prices starting at $278 and $290, respectively. You may be able to fly from Boise to Washington, D.C. Dulles Intl Airport for 72% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Boise to Washington, D.C. Dulles Intl Airport one-way?

    The cheapest airline one-way is Delta, with whom users have recently found tickets for as low as $141. However, be on the lookout for offers from Frontier and Alaska Airlines, as they are both options that can get you from Boise to Washington, D.C. Dulles Intl Airport for a low price.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Boise to Dulles Intl 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 Boise to Washington, D.C. Dulles Intl Airport?

    Currently, April is the cheapest month in which you can book a flight from Boise to Washington, D.C. Dulles Intl Airport (average of $141). Flying from Boise to Washington, D.C. Dulles Intl Airport in December is currently the most expensive (average of $498). 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 Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Alexandria
Woodbridge
Arlington
Tysons
Silver Spring
Springfield
Hanover
Gaithersburg
Fredericksburg
Fairfax
Linthicum Heights
Falls Church
Owings Mills
Manassas
Oxon Hill
Laurel
Towson
National Harbor
Waldorf
Rockville

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Top 4 airlines flying from Boise to Dulles Intl

Discover the top 4 airlines that operate flights from Boise to Dulles Intl. 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 October 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$141Average$321FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$278Average$506FlexibilityNo cancel feeOn-time69%
DeltaCheapest$290Average$384FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$363Average$484FlexibilityNo cancel feeOn-time63%

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