HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Idaho

$107+ Cheap flights from Dulles Intl (IAD) to Idaho

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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BOI
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Dulles Intl to Idaho with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Dulles Intl to Idaho

Keep the following information in mind while searching for Dulles Intl to Idaho flight deals. Data was last updated September 11, 2025.

Round-trip from

$213
(Delta)

One-way from

$107
(Delta)

Popular in

December

Cheapest in

April

Average price

$453
From Washington, D.C. Dulles Intl to Idaho
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Idaho
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($106 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from Dulles Intl to Idaho

Cheapest flights from Dulles Intl to Idaho
Explore the most affordable flight options available from Dulles Intl to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Delta deal was found by Cheapflights users on 9/10. 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 10/187:35 amIAD - BOI
1 stop10h 31mDelta
Tue 10/283:00 pmBOI - IAD
1 stop6h 39mDelta
Deal found 9/10$213
This American Airlines deal was found by Cheapflights users on 9/10. 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.
Thu 12/46:00 amIAD - BOI
1 stop8h 34mAmerican Airlines
Sat 1/101:43 pmBOI - IAD
1 stop6h 35mAmerican Airlines
Deal found 9/10$218
This Delta deal was found by Cheapflights users on 9/11. 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 10/46:23 amIAD - GEG
1 stop7h 59mDelta
Mon 10/2712:51 pmGEG - IAD
1 stop8h 21mDelta
Deal found 9/11$221
This United Airlines deal was found by Cheapflights users on 9/11. 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 10/26:30 amIAD - BOI
1 stop7h 09mUnited Airlines
Wed 10/82:44 pmBOI - IAD
1 stop8h 01mUnited Airlines
Deal found 9/11$223
This Delta deal was found by Cheapflights users on 9/11. 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 10/46:23 amIAD - GEG
1 stop7h 59mDelta
Sat 10/259:45 amGEG - IAD
2 stops10h 15mDelta
Deal found 9/11$226
This Southwest deal was found by Cheapflights users on 9/9. 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.
Wed 10/227:40 amIAD - BOI
2 stops13h 05mSouthwest
Wed 10/298:50 amBOI - IAD
1 stop7h 05mSouthwest
Deal found 9/9$230
This Delta deal was found by Cheapflights users on 9/9. 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 10/237:35 amIAD - BOI
1 stop10h 31mDelta
Sat 10/253:00 pmBOI - IAD
1 stop6h 40mDelta
Deal found 9/9$237
This Delta deal was found by Cheapflights users on 9/10. 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 10/37:35 amIAD - BOI
1 stop10h 05mDelta
Sat 10/45:25 amBOI - IAD
1 stop6h 05mDelta
Deal found 9/10$247
This Southwest deal was found by Cheapflights users on 9/9. 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.
Sat 11/85:00 amIAD - BOI
1 stop8h 00mSouthwest
Mon 11/105:00 amBOI - IAD
1 stop6h 10mSouthwest
Deal found 9/9$249
This Delta deal was found by Cheapflights users on 9/11. 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 10/47:35 amIAD - GEG
1 stop10h 14mDelta
Fri 10/2411:15 pmGEG - IAD
1 stop7h 56mDelta
Deal found 9/11$249
This Delta deal was found by Cheapflights users on 9/9. 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 10/226:18 amIAD - BOI
1 stop9h 44mDelta
Wed 10/293:00 pmBOI - IAD
1 stop6h 39mDelta
Deal found 9/9$251
This United Airlines deal was found by Cheapflights users on 9/11. 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 10/167:00 amIAD - BOI
1 stop8h 30mUnited Airlines
Mon 10/202:44 pmBOI - IAD
1 stop8h 01mUnited Airlines
Deal found 9/11$254

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Idaho 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 September 11, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Idaho that are best for you.

Fly from

Dulles Intl

Fly to

Idaho

Route

Depart

Return

Price

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Sat 10/18

7:35 am-4:06 pm

1 stop10h 31m

Boise Air Term. Gowen Fld

Tue 10/28

3:00 pm-11:39 pm

1 stop6h 39m

$213

Washington, D.C.Spokane

IAD - GEG

IADGEG

Washington, D.C. Dulles Intl

Sat 10/18

7:35 am-12:35 pm

1 stop8h 00m

Spokane

Sat 10/25

1:10 pm-11:33 pm

1 stop7h 23m

$221

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Thu 10/30

3:25 pm-11:28 pm

1 stop10h 03m

Boise Air Term. Gowen Fld

Mon 11/3

2:40 pm-12:56 am

1 stop8h 16m

$223

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Wed 10/8

12:35 pm-7:15 pm

1 stop8h 40m

Boise Air Term. Gowen Fld

Wed 10/15

2:44 pm-12:45 am

1 stop8h 01m

$223

Washington, D.C.Spokane

IAD - GEG

IADGEG

Washington, D.C. Dulles Intl

Sat 10/4

6:23 am-11:22 am

1 stop7h 59m

Spokane

Sat 10/25

9:45 am-11:00 pm

2 stops10h 15m

$226

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Fri 10/3

7:35 am-3:40 pm

1 stop10h 05m

Boise Air Term. Gowen Fld

Sat 10/4

5:25 am-1:30 pm

1 stop6h 05m

$247

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Sat 10/18

7:35 am-4:06 pm

1 stop10h 31m

Boise Air Term. Gowen Fld

Fri 10/24

11:39 pm-10:11 am

1 stop8h 32m

$247

Washington, D.C.Spokane

IAD - GEG

IADGEG

Washington, D.C. Dulles Intl

Fri 10/31

3:25 pm-11:29 pm

1 stop11h 04m

Spokane

Tue 11/4

1:47 pm-11:15 pm

1 stop6h 28m

$249

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Wed 10/29

7:35 am-4:06 pm

1 stop10h 31m

Boise Air Term. Gowen Fld

Tue 11/4

3:00 pm-11:39 pm

1 stop6h 39m

$251

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Thu 10/16

7:00 am-1:30 pm

1 stop8h 30m

Boise Air Term. Gowen Fld

Mon 10/20

2:44 pm-12:45 am

1 stop8h 01m

$254

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 60 results
1
2
3
...
6

Best time to book a flight from Dulles Intl to Idaho

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

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

Currently, October is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Idaho (average of $314). Flying from Washington, D.C. Dulles Intl Airport to Idaho in June is currently the most expensive (average of $398). 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 IAD to ID?

Find hourly flight availability from Dulles Intl to Idaho. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

When flying from Washington, D.C. Dulles Intl Airport to Idaho, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Reviews of airlines servicing Idaho

Get insights into the airlines that provide service to Idaho. 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 Idaho. Reviews last updated September 11, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest, and Delta from Washington, D.C. Dulles Intl Airport to Idaho to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Overall

8.0

Entertainment

7.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Overall

8.0

Entertainment

7.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Southwest
8.0
Very good
4,248 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Overall

8.0

Entertainment

7.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Delta
8.0
Very good
7,960 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Overall

8.0

Entertainment

7.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
United Airlines
7.4
Good
8,937 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Overall

8.0

Entertainment

7.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

Related info for your journey

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

    A quick flight from Washington, D.C. Dulles Intl Airport to Idaho can take about 10h 03m. Delta provides one of the quickest options available for as low as $223. Airlines will cover a distance of 2019 mi. This flight may include one or multiple stops.

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

    One-way options have recently been found by users for as low as $107 on Delta. Other airlines that offer cheap prices include United Airlines from $111 and American Airlines from $117 one-way.

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

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

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

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

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

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

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

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

    Currently, October is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Idaho (average of $314). Flying from Washington, D.C. Dulles Intl Airport to Idaho in June is currently the most expensive (average of $398). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Dulles Intl to Idaho

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Dallas/Fort Worth flights
Baltimore to Boston flights
Dulles Intl to Las Vegas flights
Baltimore to Dallas/Fort Worth flights
Dulles Intl to Atlanta flights
Reagan-National to O'Hare Intl flights
Reagan-National to Los Angeles flights
Reagan-National to Dallas/Fort Worth flights
Dulles Intl to O'Hare Intl flights
Dulles Intl to Orlando flights
Reagan-National to Las Vegas flights
Dulles Intl to Los Angeles flights
Baltimore to O'Hare Intl flights
Reagan-National to Miami flights
Dulles Intl to Seattle flights
Reagan-National to Boston flights
Baltimore to Las Vegas flights
Dulles Intl to Miami flights
Reagan-National to Hobby flights
Baltimore to Hobby flights
Reagan-National to Seattle flights
Reagan-National to San Francisco flights
Dulles Intl to Boston flights
Baltimore to Denver flights
Baltimore to Fort Lauderdale flights
Reagan-National to Orlando flights
Baltimore to Midway flights
Dulles Intl to San Francisco flights
Dulles Intl to Hobby flights
Baltimore to Orlando flights
Reagan-National to Atlanta flights
Baltimore to Los Angeles flights
Dulles Intl to Detroit flights
Baltimore to Atlanta flights
Baltimore to Miami flights
Dulles Intl to New Orleans flights
Dulles Intl to Tampa flights
Dulles Intl to Midway flights
Dulles Intl to Denver flights
Baltimore to Seattle flights
Reagan-National to Fort Lauderdale flights
Baltimore to San Francisco flights
Dulles Intl to Sky Harbor Intl flights
Reagan-National to Detroit flights
Reagan-National to George Bush Intcntl flights
Dulles Intl to Fort Lauderdale flights
Reagan-National to Denver flights
Dulles Intl to George Bush Intcntl flights
Reagan-National to Minneapolis flights
Dulles Intl to Austin flights

Top 4 airlines flying from Dulles Intl to Idaho

Discover the top 4 airlines that operate flights from Dulles Intl to Idaho. 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$230Average$527FlexibilityNo cancel feeOn-time75%
DeltaCheapest$237Average$595FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$314Average$606FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$389Average$537FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.