HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Big Sky

$126+ Cheap flights from Washington, D.C. (WAS) to Big Sky, MT

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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — BZN
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Washington, D.C. to Big Sky 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.

Cheapflights Tip: The best prices from Washington, D.C. to Big Sky are usually found in October or September, booked 62 days in advance, depart on a Monday or Wednesday and return on a Tuesday

Cheap flight deals from Washington, D.C. to Big Sky

Keep the following information in mind while searching for Washington, D.C. to Big Sky flight deals. Data was last updated July 31, 2025.

Round-trip from

$246
(Mytrip)

One-way from

$126
(Trip.com)

Popular in

December

Cheapest in

October

Average price

$485
From Washington, D.C. (WAS) to Big Sky
Search Deals
One-way flight from Washington, D.C. (WAS) to Big Sky
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($10 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

Find flight deals from Washington, D.C. to Big Sky

Cheapest flights from Washington, D.C. to Big Sky
Explore the most affordable flight options available from Washington, D.C. to Big Sky. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 31, 2025.

This Mytrip deal was found by Cheapflights users on 7/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/247:02 pmBWI - BZN
1 stop17h 37mMultiple Airlines
Mon 9/291:29 pmBZN - BWI
1 stop7h 07mMultiple Airlines
Deal found 7/29$246
This Delta deal was found by Cheapflights users on 7/31. 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.
Sun 8/246:10 amDCA - BZN
1 stop6h 13mDelta
Wed 8/273:34 pmBZN - DCA
1 stop6h 02mDelta
Deal found 7/31$289
This Alaska Airlines deal was found by Cheapflights users on 7/30. 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.
Sat 9/207:00 amIAD - BZN
1 stop9h 14mAlaska Airlines
Sun 9/287:23 pmBZN - IAD
1 stop10h 10mAlaska Airlines
Deal found 7/30$289
This Delta deal was found by Cheapflights users on 7/31. 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.
Sun 8/246:00 amIAD - BZN
2 stops10h 27mDelta
Wed 8/272:18 pmBZN - IAD
1 stop7h 03mDelta
Deal found 7/31$294
This United Airlines deal was found by Cheapflights users on 7/30. 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 8/256:15 amBWI - BZN
1 stop7h 29mUnited Airlines
Mon 8/254:00 pmBZN - BWI
1 stop11h 48mUnited Airlines
Deal found 7/30$298
This American Airlines deal was found by Cheapflights users on 7/30. 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 9/27:44 amIAD - BZN
2 stops13h 11mAmerican Airlines
Fri 9/57:20 amBZN - IAD
2 stops9h 31mAmerican Airlines
Deal found 7/30$299
This American Airlines deal was found by Cheapflights users on 7/31. 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.
Sun 8/246:30 amBWI - BZN
1 stop7h 15mAmerican Airlines
Sat 8/3011:28 amBZN - BWI
1 stop7h 37mAmerican Airlines
Deal found 7/31$301
This Alaska Airlines deal was found by Cheapflights users on 7/29. 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 9/187:00 amBWI - BZN
1 stop9h 14mAlaska Airlines
Tue 9/2311:26 amBZN - BWI
1 stop16h 13mAlaska Airlines
Deal found 7/29$302
This Delta deal was found by Cheapflights users on 7/30. 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 9/238:05 amBWI - BZN
1 stop7h 04mDelta
Sat 9/276:00 amBZN - BWI
1 stop5h 53mDelta
Deal found 7/30$303
This JetBlue deal was found by Cheapflights users on 7/31. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/216:15 amDCA - BZN
1 stop7h 15mJetBlue
Fri 12/2611:52 amBZN - DCA
1 stop7h 11mJetBlue
Deal found 7/31$305
This United Airlines deal was found by Cheapflights users on 7/30. 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 8/277:25 amDCA - BZN
1 stop6h 19mUnited Airlines
Wed 9/38:00 amBZN - DCA
1 stop7h 01mUnited Airlines
Deal found 7/30$309
This Southwest deal was found by Cheapflights users on 7/29. 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.
Mon 9/88:10 amBWI - BZN
2 stops10h 15mSouthwest
Tue 9/305:45 pmBZN - BWI
1 stop9h 15mSouthwest
Deal found 7/29$314

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington, D.C. to Big Sky 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 July 31, 2025.
Use the filters below to find and compare flights from Washington, D.C. to Big Sky that are best for you.

Fly from

Washington, D.C.

Fly to

Big Sky

Route

Depart

Return

Price

BaltimoreBozeman

BWI - BZN

BWIBZN

Baltimore/Washington

Wed 9/24

7:02 pm-10:39 am

1 stop17h 37m

Bozeman Gallatin Field

Mon 9/29

1:29 pm-10:36 pm

1 stop7h 07m

$246

Washington, D.C.Bozeman

DCA - BZN

DCABZN

Washington, D.C. Reagan-National

Sun 8/24

6:10 am-10:23 am

1 stop6h 13m

Bozeman Gallatin Field

Wed 8/27

11:28 am-10:01 pm

1 stop8h 33m

$289

Washington, D.C.Bozeman

IAD - BZN

IADBZN

Washington, D.C. Dulles Intl

Sat 9/20

7:00 am-2:14 pm

1 stop9h 14m

Bozeman Gallatin Field

Sun 9/28

7:23 pm-7:33 am

1 stop10h 10m

$289

Washington, D.C.Bozeman

IAD - BZN

IADBZN

Washington, D.C. Dulles Intl

Sun 8/24

6:00 am-2:27 pm

2 stops10h 27m

Bozeman Gallatin Field

Wed 8/27

5:28 pm-5:55 am

1 stop10h 27m

$294

BaltimoreBozeman

BWI - BZN

BWIBZN

Baltimore/Washington

Mon 8/25

6:15 am-11:44 am

1 stop7h 29m

Bozeman Gallatin Field

Mon 8/25

4:00 pm-5:48 am

1 stop11h 48m

$298

Washington, D.C.Bozeman

IAD - BZN

IADBZN

Washington, D.C. Dulles Intl

Tue 9/2

7:44 am-6:55 pm

2 stops13h 11m

Bozeman Gallatin Field

Fri 9/5

7:20 am-6:51 pm

2 stops9h 31m

$299

BaltimoreBozeman

BWI - BZN

BWIBZN

Baltimore/Washington

Sun 8/24

6:30 am-11:45 am

1 stop7h 15m

Bozeman Gallatin Field

Sat 8/30

11:28 am-9:05 pm

1 stop7h 37m

$301

BaltimoreBozeman

BWI - BZN

BWIBZN

Baltimore/Washington

Thu 9/18

7:00 am-2:14 pm

1 stop9h 14m

Bozeman Gallatin Field

Mon 9/22

7:23 pm-5:39 am

1 stop8h 16m

$302

BaltimoreBozeman

BWI - BZN

BWIBZN

Baltimore/Washington

Tue 9/23

8:05 am-1:09 pm

1 stop7h 04m

Bozeman Gallatin Field

Sat 9/27

6:00 am-1:53 pm

1 stop5h 53m

$303

Washington, D.C.Bozeman

DCA - BZN

DCABZN

Washington, D.C. Reagan-National

Wed 8/27

7:25 am-11:44 am

1 stop6h 19m

Bozeman Gallatin Field

Wed 9/3

8:00 am-5:01 pm

1 stop7h 01m

$309

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 39 results
1
2
3
4

Best time to book a flight from Washington, D.C. to Big Sky

Have a flexible travel schedule? Discover the best time to fly to Big Sky from Washington, D.C. 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. to Big Sky

How far ahead should I book a flight from Washington, D.C. to Big Sky?

Use this chart to determine the optimal time to book a round-trip flight from Washington, D.C. to Big Sky. Price data was last updated on July 25, 2025.

Booking 62 days in advance of your planned departure date is, on average, the best time to get cheap flights from Washington, D.C. to Big Sky. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Washington, D.C. to Big Sky?

Currently, October is the cheapest month in which you can book a flight from Washington, D.C. to Big Sky (average of $371). Flying from Washington, D.C. to Big Sky in May is currently the most expensive (average of $478). 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 WAS to BS1?

Find hourly flight availability from Washington, D.C. to Big Sky. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 31, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Washington, D.C. to Big Sky as you normally would.

Reviews of airlines servicing Big Sky

Get insights into the airlines that provide service to Big Sky. 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 Big Sky. Reviews last updated July 31, 2025.
See what other customers who have flown with Alaska Airlines, Southwest, and Delta from Washington, D.C. to Big Sky 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
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Southwest
8.0
Very good
4,246 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,981 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Hawaiian Airlines
7.8
Good
2,611 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,900 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. to Big Sky. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines to fly from Washington, D.C. to Big Sky one-way?

    $126 is the cheapest one-way deal found within the past few days, from Alaska Airlines. You may also be able to find cheap deals on Delta and JetBlue, with prices starting from $129 and $139, respectively.

  • What are the most popular routes from Washington, D.C. to Big Sky?

    While some choose either Baltimore/Washington - Bozeman Gallatin Field or Washington, D.C. Reagan-National - Bozeman Gallatin Field, Washington, D.C. Dulles Intl - Bozeman Gallatin Field is the most popular route from Washington, D.C. to Big Sky.

  • Can I find deals for flights from Washington, D.C. to Big Sky that include hotel bookings?

    Yes. In addition to deals on Washington, D.C. to Big Sky flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington, D.C. to Big Sky?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to Big Sky.

  • Can I find deals for business class flights from Washington, D.C. to Big Sky?

    Yes. Cheapflights offers flight deals from Washington, D.C. to Big Sky 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. to Big Sky?

    Currently, October is the cheapest month in which you can book a flight from Washington, D.C. to Big Sky (average of $371). Flying from Washington, D.C. to Big Sky in May is currently the most expensive (average of $478). 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.

Top 5 airlines flying from Washington, D.C. to Big Sky

Discover the top 5 airlines that operate flights from Washington, D.C. to Big Sky. 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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$196Average$388FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$236Average$404FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$256Average$502FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$278Average$436FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$294Average$630FlexibilityNo cancel feeOn-time69%

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.