HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Big Sky

$79+ Cheap flights from Portland (PDX) 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 8/19. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — BZN
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Portland 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 Portland to Big Sky are usually found in January or October, booked 44 days in advance, depart on a Monday or Tuesday and return on a Thursday

Cheap flight deals from Portland to Big Sky

Keep the following information in mind while searching for Portland to Big Sky flight deals. Data was last updated July 30, 2025.

Round-trip from

$137
(Hawaiian Airlines)

One-way from

$79
(Alaska Airlines)

Popular in

December

Cheapest in

January

Average price

$343
From Portland to Big Sky
Search Deals
One-way flight from Portland to Big Sky
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($3 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% 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 Portland to Big Sky

Cheapest flights from Portland to Big Sky
Explore the most affordable flight options available from Portland to Big Sky. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 30, 2025.

This Hawaiian Airlines deal was found by Cheapflights users on 7/27. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/69:30 pmPDX - BZN
Nonstop1h 42mHawaiian Airlines
Tue 9/91:54 pmBZN - PDX
Nonstop1h 50mHawaiian Airlines
Deal found 7/27$137
This Alaska Airlines deal was found by Cheapflights users on 7/27. 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.
Sat 9/69:30 pmPDX - BZN
Nonstop1h 42mAlaska Airlines
Sat 9/135:22 amBZN - PDX
Nonstop1h 56mAlaska Airlines
Deal found 7/27$138
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/275:00 amPDX - BZN
1 stop7h 31mUnited Airlines
Sat 9/134:20 pmBZN - PDX
1 stop5h 41mUnited Airlines
Deal found 7/29$177
This Delta deal was found by Cheapflights users on 7/27. 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.
Sat 9/65:05 pmPDX - BZN
1 stop5h 08mDelta
Tue 9/911:56 amBZN - PDX
1 stop6h 03mDelta
Deal found 7/27$186

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland 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 30, 2025.
Use the filters below to find and compare flights from Portland to Big Sky that are best for you.

Fly from

Portland

Fly to

Big Sky

Route

Depart

Return

Price

PortlandBozeman

PDX - BZN

PDXBZN

Portland

Wed 8/27

9:30 pm-12:12 am

Nonstop1h 42m

Bozeman Gallatin Field

Wed 9/3

5:22 am-6:18 am

Nonstop1h 56m

$137

PortlandBozeman

PDX - BZN

PDXBZN

Portland

Tue 8/19

9:35 pm-12:11 am

Nonstop1h 36m

Bozeman Gallatin Field

Sat 8/23

5:22 am-6:18 am

Nonstop1h 56m

$138

PortlandBozeman

PDX - BZN

PDXBZN

Portland

Wed 8/27

10:55 am-5:03 pm

1 stop5h 08m

Bozeman Gallatin Field

Wed 9/3

4:20 pm-9:01 pm

1 stop5h 41m

$177

PortlandBozeman

PDX - BZN

PDXBZN

Portland

Wed 8/27

5:45 pm-10:26 pm

1 stop3h 41m

Bozeman Gallatin Field

Wed 9/3

5:30 am-8:51 am

1 stop4h 21m

$186

PortlandBozeman

PDX - BZN

PDXBZN

Portland

Wed 10/8

8:04 pm-9:17 am

1 stop12h 13m

Bozeman Gallatin Field

Sun 10/12

10:07 am-7:04 pm

1 stop9h 57m

$247

PortlandBozeman

PDX - BZN

PDXBZN

Portland

Tue 8/19

1:25 pm-6:31 pm

1 stop4h 06m

$79

PortlandBozeman

PDX - BZN

PDXBZN

Portland

Wed 8/20

9:30 pm-12:12 am

Nonstop1h 42m

$88

PortlandBozeman

PDX - BZN

PDXBZN

Portland

Wed 8/20

5:30 am-11:16 am

1 stop4h 46m

$100

PortlandBozeman

PDX - BZN

PDXBZN

Portland

Wed 8/13

7:52 pm-11:15 am

1 stop14h 23m

$137

PortlandBozeman

PDX - BZN

PDXBZN

Portland

Wed 8/20

6:40 am-4:50 pm

2 stops9h 10m

$164

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 11 results
1
2

Best time to book a flight from Portland to Big Sky

Have a flexible travel schedule? Discover the best time to fly to Big Sky from Portland 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 Portland to Big Sky

How far ahead should I book a flight from Portland to Big Sky?

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

The best time to book flights from Portland to Big Sky is 44 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Portland to Big Sky?

Currently, October is the cheapest month in which you can book a flight from Portland to Big Sky (average of $371). Flying from Portland 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 PDX to BS1?

Find hourly flight availability from Portland 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 30, 2025.

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

What is the cheapest day to fly from Portland to Big Sky?

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

Travelers seeking maximum savings on their Portland to Big Sky flight should consider departing on Monday at noon when fares are most often at their lowest. Thursday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Portland to Big Sky

Explore weekly flight availability from Portland to Big Sky. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 30, 2025.

The most flights from PDX to BS1 are scheduled on a Monday (5 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (4 on average).

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 30, 2025.
See what other customers who have flown with Alaska Airlines, Southwest, and Delta from Portland 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

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Food

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

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Food

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
4,241 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Food

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
7,980 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Food

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

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Food

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
8,896 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Food

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 Portland 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 airport do you fly from for flights from Portland to Big Sky?

    If you book a flight to Big Sky from Portland, you will be flying from Portland, which is the city’s only airport. Portland (PDX) is located 6.0 mi from the center of Portland. There are 4 flights from Portland to Big Sky per day from 3 different airlines.

  • What are the cheapest airlines to fly from Portland to Big Sky one-way?

    The cheapest airline one-way is Alaska Airlines, with whom users have recently found tickets for as low as $79. However, be on the lookout for offers from Hawaiian Airlines and Delta, as they are both options that can get you from Portland to Big Sky for a low price.

  • What are the most reliable airlines from Portland to Big Sky?

    Before booking your flight to Big Sky from Portland, check out the most reliable airlines to get you to your destination on time: Alaska Airlines (92%), Horizon Air (92%), Hawaiian Airlines( 92%).

  • What are the cheapest flights from Portland to Big Sky?

    The cheapest flight price from Portland to Big Sky is $98. On average you can expect to pay $271. The most popular route, (Portland - Bozeman Gallatin Field), can usually be booked for $137.

  • Can I find deals for flights from Portland to Big Sky that include hotel bookings?

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

  • How can I find direct flights from Portland to Big Sky?

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

  • Can I find deals for business class flights from Portland to Big Sky?

    Yes. Cheapflights offers flight deals from Portland 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 Portland to Big Sky?

    Currently, October is the cheapest month in which you can book a flight from Portland to Big Sky (average of $371). Flying from Portland 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.

Alternative routes for Portland to Big Sky

See prices for flight routes from nearby airports that may be better suited for you.
Portland to Billings flights
Portland to Helena flights
Portland to Bozeman flights
Portland to Kalispell flights
Portland to Missoula flights
Boise to Bozeman flights
Boise to Kalispell flights
Portland to Great Falls flights
Redmond to Great Falls flights
Boise to Missoula flights
Boise to Billings flights
Medford to Billings flights
Boise to Helena flights
Portland to Cody flights
Eugene to Bozeman flights
Eugene to Kalispell flights
Eugene to Great Falls flights
Redmond to Missoula flights
Redmond to Bozeman flights
Eugene to Billings flights
Portland to Butte flights
Redmond to Helena flights
Medford to Great Falls flights
Medford to Bozeman flights
Medford to Kalispell flights
Yakima to Kalispell flights
Yakima to Helena flights
Yakima to Missoula flights
Boise to Cody flights
Boise to Butte flights

Top 3 airlines flying from Portland to Big Sky

Discover the top 3 airlines that operate flights from Portland 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 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$137Average$277FlexibilityNo cancel feeOn-time85%
DeltaCheapest$184Average$445FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$195Average$364FlexibilityNo cancel feeOn-time75%

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.