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Dulles Intl

$125+ Cheap flights from Idaho 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 2/3. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — IAD
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap flight deals from Idaho to Dulles Intl

Cheapest flights from Idaho to Dulles Intl
Explore the most affordable flight options available from Idaho to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This United Airlines deal was found by Cheapflights users on 12/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/295:00 amIDA - IAD
1 stop8h 34mUnited Airlines
Thu 1/14:00 pmIAD - IDA
1 stop7h 14mUnited Airlines
Deal found 12/15$481
This United Airlines deal was found by Cheapflights users on 12/17. 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.
Wed 12/3112:20 pmBOI - IAD
1 stop7h 01mUnited Airlines
Sun 1/46:20 amIAD - BOI
1 stop9h 16mUnited Airlines
Deal found 12/17$600
This United Airlines deal was found by Cheapflights users on 12/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3110:45 amIDA - IAD
1 stop8h 40mUnited Airlines
Fri 1/1610:20 pmIAD - IDA
2 stops17h 10mUnited Airlines
Deal found 12/18$615
This Delta deal was found by Cheapflights users on 12/15. 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.
Tue 12/231:00 pmBOI - IAD
1 stop8h 18mDelta
Tue 1/202:15 pmIAD - BOI
1 stop8h 40mDelta
Deal found 12/15$620
This American Airlines deal was found by Cheapflights users on 12/18. 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 12/311:16 pmIDA - IAD
2 stops17h 26mAmerican Airlines
Fri 1/167:01 amIAD - IDA
2 stops17h 35mAmerican Airlines
Deal found 12/18$648
This American Airlines deal was found by Cheapflights users on 12/16. 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 12/312:18 pmBOI - IAD
2 stops16h 24mAmerican Airlines
Sun 1/46:05 amIAD - BOI
1 stop8h 32mAmerican Airlines
Deal found 12/16$666
This Delta deal was found by Cheapflights users on 12/16. 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 12/2212:50 pmJAC - IAD
2 stops8h 18mDelta
Wed 12/247:05 amIAD - JAC
1 stop6h 50mDelta
Deal found 12/16$677
This United Airlines deal was found by Cheapflights users on 12/17. 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.
Fri 12/266:35 amBOI - IAD
1 stop10h 43mUnited Airlines
Wed 12/319:47 amIAD - BOI
1 stop10h 16mUnited Airlines
Deal found 12/17$702
This American Airlines deal was found by Cheapflights users on 12/15. 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.
Mon 12/291:16 pmIDA - IAD
2 stops17h 26mAmerican Airlines
Thu 1/16:35 amIAD - IDA
2 stops17h 46mAmerican Airlines
Deal found 12/15$718
This United Airlines deal was found by Cheapflights users on 12/16. 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 12/227:00 amJAC - IAD
1 stop6h 34mUnited Airlines
Wed 12/242:24 pmIAD - JAC
1 stop8h 28mUnited Airlines
Deal found 12/16$719
This Delta deal was found by Cheapflights users on 12/16. 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 12/1712:55 pmJAC - IAD
1 stop8h 34mDelta
Thu 12/1812:30 pmIAD - JAC
2 stops10h 59mDelta
Deal found 12/16$724
This Alaska Airlines deal was found by Cheapflights users on 12/17. 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.
Fri 12/197:11 pmBOI - IAD
1 stop20h 10mAlaska Airlines
Sun 1/115:26 pmIAD - BOI
2 stops20h 15mAlaska Airlines
Deal found 12/17$741

Find flight deals from Idaho to Dulles Intl

Keep the following information in mind while searching for Idaho to Dulles Intl flight deals. Data was last updated December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$280
(United Airlines)

One-way from

$125
(United Airlines)

Popular in

January

Cheapest in

August

Average price

$584
Provider with most accurate pricing for Boise Air Term. Gowen Fld-Washington, D.C. (WAS) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-Washington, D.C. (WAS) flights.
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From Idaho to Washington, D.C. Dulles Intl
Search Deals
One-way flight from Idaho to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 26% potential increase in price ($169 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 10% potential price decrease ($47 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Idaho 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 December 18, 2025.
Use the filters below to find and compare flights from Idaho to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Idaho

Fly to

Dulles Intl

Route

Depart

Return

Price

JacksonWashington, D.C.

JAC - IAD

JACIAD

Jackson Hole

Mon 1/12

2:40 pm-11:22 pm

1 stop6h 42m

Washington, D.C. Dulles Intl

Wed 1/21

6:00 am-12:58 pm

1 stop8h 58m

$280

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Sat 3/7

1:51 pm-11:10 pm

1 stop7h 19m

Washington, D.C. Dulles Intl

Sat 3/14

7:00 am-4:00 pm

1 stop11h 00m

$287

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Tue 1/13

6:23 am-4:26 pm

1 stop8h 03m

Washington, D.C. Dulles Intl

Tue 1/20

6:04 pm-10:52 am

1 stop18h 48m

$287

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Wed 3/4

10:41 am-11:10 pm

1 stop10h 29m

Washington, D.C. Dulles Intl

Sun 3/8

7:00 am-1:06 pm

1 stop8h 06m

$287

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Fri 1/9

5:45 am-4:26 pm

1 stop7h 41m

Washington, D.C. Dulles Intl

Tue 1/13

6:04 pm-9:25 pm

1 stop30h 21m

$287

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Mon 1/12

1:40 pm-11:10 pm

1 stop7h 30m

Washington, D.C. Dulles Intl

Wed 1/21

7:30 am-4:17 pm

1 stop10h 47m

$287

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Fri 2/6

9:05 am-4:26 pm

1 stop28h 21m

Washington, D.C. Dulles Intl

Mon 2/9

6:04 pm-12:44 pm

1 stop21h 40m

$287

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Wed 3/4

10:41 am-11:10 pm

1 stop10h 29m

Washington, D.C. Dulles Intl

Wed 3/11

7:00 am-4:00 pm

1 stop11h 00m

$287

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Fri 1/9

6:05 am-11:10 pm

1 stop14h 05m

Washington, D.C. Dulles Intl

Wed 1/14

7:30 am-12:08 am

1 stop19h 38m

$287

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Tue 2/17

5:00 am-11:10 pm

1 stop15h 10m

Washington, D.C. Dulles Intl

Mon 2/23

7:30 am-12:04 am

1 stop19h 34m

$287

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 60 results
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Best time to book a flight from Idaho to Dulles Intl

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

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

Currently, April is the cheapest month in which you can book a flight from Idaho to Washington, D.C. Dulles Intl Airport (average of $141). Flying from Idaho to Washington, D.C. Dulles Intl Airport in September is currently the most expensive (average of $483). 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 ID to IAD?

Find hourly flight availability from Idaho 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 December 18, 2025.

It’s typically best to fly out from Idaho to Washington, D.C. Dulles Intl Airport in the evening. Doing so could potentially save you 26% on the flight price compared to flying in the afternoon, which is usually more expensive.

What is the cheapest day to fly from Idaho to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Idaho to Dulles Intl. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Idaho to Washington, D.C. Dulles Intl Airport flight should consider departing on Tuesday mornings when fares are most often at their lowest. Wednesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Related info for your journey

Find useful and relevant information for your journey from Idaho to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    Airlines like United Airlines, Delta, and Alaska Airlines fly from Idaho to Washington, D.C. Dulles Intl Airport in about 6h 42m. The time it takes to get you to your destination can typically vary by up to 59m. The distance from Idaho to Washington, D.C. Dulles Intl Airport is about 1745 mi. This flight may include one or multiple stops.

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

    $142 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on United Airlines and American Airlines, with prices starting from $150 and $197, respectively.

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

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

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

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

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

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

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

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

    Currently, April is the cheapest month in which you can book a flight from Idaho to Washington, D.C. Dulles Intl Airport (average of $141). Flying from Idaho to Washington, D.C. Dulles Intl Airport in September is currently the most expensive (average of $483). 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
Tysons
Arlington
Owings Mills
Springfield
Hanover
Silver Spring
Fredericksburg
Linthicum Heights
Rockville
Laurel
Towson
Manassas
National Harbor
Bowie
Largo
McLean
Clinton
Cordova

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Alternative routes for Idaho to Dulles Intl

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

Discover the top 4 airlines that operate flights from Idaho 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$141Average$370FlexibilityNo cancel feeOn-time75%
DeltaCheapest$290Average$384FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$300Average$552FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$379Average$439FlexibilityNo cancel feeOn-time63%

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