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Dulles Intl

$129+ 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 4/1. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — IAD
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
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 January 29, 2026.

This Alaska Airlines deal was found by Cheapflights users on 1/26. 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 2/246:28 am
BOI
-
IAD
1 stop8h 52m
Alaska Airlines
Tue 3/37:05 am
IAD
-
BOI
1 stop10h 03m
Alaska Airlines
Deal found 1/26$257
This Delta deal was found by Cheapflights users on 1/28. 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 2/1811:22 am
GEG
-
IAD
1 stop8h 48m
Delta
Wed 2/257:30 am
IAD
-
GEG
1 stop10h 28m
Delta
Deal found 1/28$257
This Delta deal was found by Cheapflights users on 1/27. 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 3/1010:35 am
BOI
-
IAD
2 stops11h 06m
Delta
Sat 3/147:00 am
IAD
-
BOI
1 stop8h 05m
Delta
Deal found 1/27$262
This Delta deal was found by Cheapflights users on 1/26. 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 2/248:50 am
BOI
-
IAD
2 stops13h 05m
Delta
Tue 3/36:00 am
IAD
-
BOI
2 stops9h 58m
Delta
Deal found 1/26$268
This Delta deal was found by Cheapflights users on 1/26. 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 3/35:00 am
GEG
-
IAD
2 stops11h 09m
Delta
Wed 3/46:00 am
IAD
-
GEG
2 stops9h 35m
Delta
Deal found 1/26$268
This United Airlines deal was found by Cheapflights users on 1/28. 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.
Tue 3/177:02 am
GEG
-
IAD
1 stop10h 47m
United Airlines
Tue 3/244:00 pm
IAD
-
GEG
1 stop8h 18m
United Airlines
Deal found 1/28$285
This Alaska Airlines deal was found by Cheapflights users on 1/27. 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 3/57:04 pm
SUN
-
IAD
1 stop8h 36m
Alaska Airlines
Sun 3/87:05 am
IAD
-
SUN
1 stop13h 17m
Alaska Airlines
Deal found 1/27$289
This American Airlines deal was found by Cheapflights users on 1/28. 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 3/176:00 am
GEG
-
IAD
2 stops11h 29m
American Airlines
Tue 3/245:00 am
IAD
-
GEG
2 stops9h 44m
American Airlines
Deal found 1/28$290
This Alaska Airlines deal was found by Cheapflights users on 1/28. 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 10/276:15 am
IDA
-
IAD
1 stop9h 01m
Alaska Airlines
Thu 10/296:30 am
IAD
-
IDA
1 stop10h 59m
Alaska Airlines
Deal found 1/28$309
This United Airlines deal was found by Cheapflights users on 1/28. 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 2/198:41 am
BOI
-
IAD
1 stop8h 46m
United Airlines
Sat 2/283:58 pm
IAD
-
BOI
1 stop7h 34m
United Airlines
Deal found 1/28$310
This Delta deal was found by Cheapflights users on 1/26. 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 2/262:05 pm
GEG
-
IAD
1 stop6h 50m
Delta
Wed 3/47:00 am
IAD
-
GEG
1 stop9h 08m
Delta
Deal found 1/26$310
This American Airlines deal was found by Cheapflights users on 1/28. 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 2/256:15 am
GEG
-
IAD
2 stops11h 15m
American Airlines
Wed 3/45:00 am
IAD
-
GEG
2 stops9h 44m
American Airlines
Deal found 1/28$313

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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$257
(Alaska Airlines)

One-way from

$129
(Delta)

Popular in

January

Cheapest in

August

Average price

$1,006
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.
Search Deals
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. 28% potential increase in price ($181 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 12% potential price decrease ($51 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 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 January 29, 2026.
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

Sat 3/7

1:51 pm-11:10 pm

1 stop7h 19m

Washington, D.C. Dulles Intl

Sat 3/14

7:00 am-1:05 pm

1 stop8h 05m

$257

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Tue 2/24

6:28 am-5:20 pm

1 stop8h 52m

Washington, D.C. Dulles Intl

Tue 3/3

7:05 am-3:08 pm

1 stop10h 03m

$257

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Wed 2/25

5:00 am-1:05 pm

1 stop6h 05m

Washington, D.C. Dulles Intl

Wed 3/4

2:36 pm-11:38 pm

1 stop11h 02m

$257

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Tue 3/10

1:40 pm-12:27 am

1 stop8h 47m

Washington, D.C. Dulles Intl

Sat 3/14

7:00 am-4:00 pm

1 stop11h 00m

$257

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Wed 2/25

5:00 am-3:44 pm

1 stop7h 44m

Washington, D.C. Dulles Intl

Wed 3/4

12:35 pm-9:07 pm

1 stop11h 32m

$257

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Wed 2/18

11:22 am-11:10 pm

1 stop8h 48m

Washington, D.C. Dulles Intl

Wed 2/25

7:30 am-2:58 pm

1 stop10h 28m

$257

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Tue 2/24

12:59 pm-11:46 pm

1 stop8h 47m

Washington, D.C. Dulles Intl

Tue 3/3

2:17 pm-11:05 pm

2 stops10h 48m

$262

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Wed 2/25

10:45 am-11:55 pm

2 stops11h 10m

Washington, D.C. Dulles Intl

Wed 3/4

7:00 am-1:59 pm

1 stop8h 59m

$262

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Tue 4/21

9:45 am-12:42 am

2 stops11h 57m

Washington, D.C. Dulles Intl

Tue 5/5

6:00 am-1:03 pm

1 stop10h 03m

$262

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Tue 3/3

5:00 am-7:09 pm

2 stops11h 09m

Washington, D.C. Dulles Intl

Wed 3/4

6:00 am-12:35 pm

2 stops9h 35m

$268

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

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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.

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 United Airlines fly from Idaho to Washington, D.C. Dulles Intl Airport in about 6h 05m. The time it takes to get you to your destination can typically vary by up to 2h 47m. 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?

    $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
Silver Spring
Herndon
Fredericksburg
Hanover
Linthicum Heights
Rockville
Laurel
Towson
Manassas
Largo
Bowie
McLean
Clinton
Upper Marlboro

Browse thousands of different options on Cheapflights for your next trip

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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.
Los Angeles to Reagan-National flights
Dallas/Fort Worth to Dulles Intl flights
Los Angeles to Baltimore flights
Los Angeles to Dulles Intl flights
O'Hare Intl to Reagan-National flights
Boston to Baltimore flights
Dallas/Fort Worth to Baltimore flights
O'Hare Intl to Baltimore flights
Dallas/Fort Worth to Reagan-National flights
O'Hare Intl to Dulles Intl flights
San Francisco to Reagan-National flights
Boston to Dulles Intl flights
Boston to Reagan-National flights
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Atlanta to Baltimore flights
Seattle to Reagan-National flights
Miami to Dulles Intl flights
Atlanta to Dulles Intl flights
Hobby to Reagan-National flights
Hobby to Dulles Intl flights
San Francisco to Dulles Intl flights
Atlanta to Reagan-National flights
George Bush Intcntl to Reagan-National flights
San Francisco to Baltimore flights
Orlando to Reagan-National flights
Seattle to Dulles Intl flights
Fort Lauderdale to Dulles Intl flights
Denver to Baltimore flights
Detroit to Dulles Intl flights
Hobby to Baltimore flights
Orlando to Baltimore flights
Miami to Baltimore flights
Charlotte to Dulles Intl flights
Tampa to Dulles Intl flights
Austin to Dulles Intl flights
George Bush Intcntl to Dulles Intl flights
Denver to Dulles Intl flights
Seattle to Baltimore flights
Midway to Dulles Intl flights
Denver to Reagan-National flights
Fort Lauderdale to Baltimore flights
Minneapolis to Reagan-National flights
Detroit to Baltimore flights
Sky Harbor Intl to Dulles Intl flights
Austin to Reagan-National flights
Charlotte to Baltimore flights
LaGuardia to Reagan-National flights
Austin to Baltimore flights
Tampa to Reagan-National flights
Minneapolis to Baltimore 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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$141Average$300FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$278Average$579FlexibilityNo cancel feeOn-time69%
DeltaCheapest$287Average$384FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$389Average$475FlexibilityNo cancel feeOn-time63%

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