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Dulles Intl

$100+ 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 1/15. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — IAD
Dec 3 — Dec 101
Wed 12/3
Wed 12/10
1 adult, Economy
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Cheap 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 November 3, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$287
(Delta)

One-way from

$100
(Kiwi.com)

Popular in

March

Cheapest in

August

Average price

$521
Provider with most accurate pricing for Boise Air Term. Gowen Fld-Washington, D.C. (WAS) flight deals.
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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
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One-way flight from Idaho to Washington, D.C. Dulles Intl
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Highest demand for flights based on searches. 2% potential increase in price ($10 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find 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 November 3, 2025.

This Delta deal was found by Cheapflights users on 11/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/41:54 pmBOI - IAD
1 stop7h 33mDelta
Mon 12/87:15 amIAD - BOI
1 stop10h 47mDelta
Deal found 11/3$287
This Alaska Airlines deal was found by Cheapflights users on 11/3. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/55:51 amGEG - IAD
1 stop7h 45mAlaska Airlines
Sat 12/67:34 amIAD - GEG
1 stop19h 50mAlaska Airlines
Deal found 11/3$304
This Delta deal was found by Cheapflights users on 11/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/35:05 amGEG - IAD
1 stop15h 22mDelta
Sun 12/77:15 amIAD - GEG
1 stop10h 40mDelta
Deal found 11/3$305
This Delta deal was found by Cheapflights users on 11/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/36:05 amGEG - IAD
1 stop14h 22mDelta
Sat 12/67:05 amIAD - GEG
2 stops10h 50mDelta
Deal found 11/3$316
This Alaska Airlines deal was found by Cheapflights users on 11/3. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/21:33 pmGEG - IAD
1 stop24h 03mAlaska Airlines
Fri 12/56:30 pmIAD - GEG
1 stop17h 22mAlaska Airlines
Deal found 11/3$324
This Delta deal was found by Cheapflights users on 11/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/211:19 amGEG - IAD
1 stop9h 08mDelta
Sun 12/77:15 amIAD - GEG
1 stop18h 34mDelta
Deal found 11/3$325
This KAYAK deal was found by Cheapflights users on 11/1. 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.
Wed 12/36:03 amBOI - IAD
1 stop8h 33mAlaska Airlines
Thu 12/117:34 amIAD - BOI
1 stop9h 52mAlaska Airlines
Deal found 11/1$332
This Delta deal was found by Cheapflights users on 11/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/276:00 amGEG - IAD
2 stops10h 26mDelta
Thu 12/47:15 amIAD - GEG
1 stop8h 15mDelta
Deal found 11/3$336
This Alaska Airlines deal was found by Cheapflights users on 11/3. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/35:51 amGEG - IAD
1 stop7h 45mAlaska Airlines
Thu 12/47:34 amIAD - GEG
1 stop19h 50mAlaska Airlines
Deal found 11/3$350
This United Airlines deal was found by Cheapflights users on 11/2. 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 12/255:00 amBOI - IAD
1 stop8h 34mUnited Airlines
Thu 1/16:20 amIAD - BOI
1 stop9h 16mUnited Airlines
Deal found 11/2$351
This Delta deal was found by Cheapflights users on 11/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/211:19 amGEG - IAD
1 stop9h 08mDelta
Wed 12/36:03 amIAD - GEG
1 stop10h 15mDelta
Deal found 11/3$351
This Alaska Airlines deal was found by Cheapflights users on 11/2. 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 12/45:59 pmBOI - IAD
1 stop10h 07mAlaska Airlines
Mon 12/86:30 pmIAD - BOI
1 stop18h 04mAlaska Airlines
Deal found 11/2$352

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 November 3, 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

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Thu 12/4

1:54 pm-11:27 pm

1 stop7h 33m

Washington, D.C. Dulles Intl

Mon 12/8

7:15 am-4:02 pm

1 stop10h 47m

$287

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Sun 2/1

5:55 pm-4:26 pm

1 stop20h 31m

Washington, D.C. Dulles Intl

Mon 2/16

6:55 pm-1:45 pm

1 stop20h 50m

$287

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Fri 12/5

5:51 am-4:36 pm

1 stop7h 45m

Washington, D.C. Dulles Intl

Sat 12/6

7:34 am-12:24 am

1 stop19h 50m

$304

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Tue 12/2

1:33 pm-4:36 pm

1 stop24h 03m

Washington, D.C. Dulles Intl

Tue 12/9

7:34 am-12:39 pm

1 stop8h 05m

$304

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Sat 12/6

5:51 am-4:36 pm

1 stop7h 45m

Washington, D.C. Dulles Intl

Mon 12/8

7:34 am-11:14 pm

1 stop18h 40m

$304

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Sat 12/6

5:51 am-4:36 pm

1 stop7h 45m

Washington, D.C. Dulles Intl

Tue 12/9

7:34 am-7:05 pm

1 stop14h 31m

$304

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Thu 12/4

1:10 pm-11:27 pm

1 stop7h 17m

Washington, D.C. Dulles Intl

Sun 12/7

7:15 am-10:49 pm

1 stop18h 34m

$305

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Sat 12/6

11:19 am-11:27 pm

1 stop9h 08m

Washington, D.C. Dulles Intl

Sun 12/7

7:15 am-12:29 pm

1 stop8h 14m

$305

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Fri 12/5

6:05 am-11:27 pm

1 stop14h 22m

Washington, D.C. Dulles Intl

Sun 12/7

7:15 am-10:49 pm

1 stop18h 34m

$305

JacksonWashington, D.C.

JAC - IAD

JACIAD

Jackson Hole

Thu 3/5

1:10 pm-11:50 pm

1 stop8h 40m

Washington, D.C. Dulles Intl

Mon 3/9

7:15 am-12:17 pm

1 stop7h 02m

$311

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/1

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 December is currently the most expensive (average of $510). 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 November 3, 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 Delta, Alaska Airlines, and Hawaiian Airlines fly from Idaho to Washington, D.C. Dulles Intl Airport in about 7h 33m. The time it takes to get you to your destination can typically vary by up to 12h 58m. The distance from Idaho to Washington, D.C. Dulles Intl Airport is about 2019 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?

    $125 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on Frontier and Alaska Airlines, with prices starting from $132 and $158, 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 Boise Air Term. Gowen Fld - Washington, D.C. Dulles Intl, Spokane - 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 December is currently the most expensive (average of $510). 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
Springfield
Hanover
Silver Spring
Fairfax
Fredericksburg
Falls Church
Owings Mills
Linthicum Heights
Manassas
Largo
Oxon Hill
Laurel
Towson
National Harbor
Waldorf
Bowie

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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.
Dallas/Fort Worth to Dulles Intl flights
Dallas/Fort Worth to Reagan-National flights
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Seattle to Reagan-National flights
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Miami to Dulles Intl flights
Denver to Reagan-National flights
George Bush Intcntl to Baltimore flights
Orlando to Baltimore flights
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Detroit to Reagan-National flights
Minneapolis to Reagan-National flights
John F Kennedy Intl to Reagan-National flights
Fort Lauderdale to Dulles Intl flights
Tampa to Reagan-National flights
Miami to Reagan-National flights
Austin to Dulles Intl flights
Minneapolis to Dulles Intl flights

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 November 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$141Average$321FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$278Average$610FlexibilityNo cancel feeOn-time69%
DeltaCheapest$290Average$384FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$389Average$478FlexibilityNo cancel feeOn-time63%

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