$104 Find Cheap Flights from Portland to Big Sky - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Portland to Big Sky departing on 9/5. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$197
Typical prices: $158-$332
Alaska Airlines
Wed 9/2Wed 9/9
PDX - BZN • Non-stop
Cheapest one-way
$104
Typical prices: $203-$306
United Airlines
Sat 9/5
PDX - BZN • 1 stop
Arrival airport
You can't fly directly to Big Sky. It is served by Bozeman (BZN), located 37.5 miles from Big Sky.
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Flight Deals
Useful Info
Flight Deals

Cheap Flights from Portland to Big Sky (PDX-BZN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Portland to Big Sky that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Portland to Big Sky

Wed, Sep 2 - Wed, Sep 9
Alaska Airlines Logo
10:33 am - 1:24 pm
PDX
-
BZN
1h 51mnonstop
Alaska Airlines Logo
3:42 pm - 4:34 pm
BZN
-
PDX
1h 52mnonstop
$197Alaska Airlines
Wed, Sep 2 - Wed, Sep 9
Delta Logo
7:05 am - 2:34 pm
PDX
-
BZN
6h 29m
1 stop
Delta Logo
3:38 pm - 8:02 pm
BZN
-
PDX
5h 24m
1 stop
$207Delta
Wed, Oct 21 - Sat, Oct 24
Alaska Airlines Logo
10:30 am - 1:15 pm
PDX
-
BZN
1h 45mnonstop
Alaska Airlines Logo
3:55 pm - 4:43 pm
BZN
-
PDX
1h 48mnonstop
$207Alaska Airlines
Wed, Oct 21 - Wed, Nov 4
Alaska Airlines Logo
10:30 am - 1:15 pm
PDX
-
BZN
1h 45mnonstop
Alaska Airlines Logo
3:54 pm - 4:50 pm
BZN
-
PDX
1h 56mnonstop
$207Alaska Airlines
Tue, Sep 29 - Sat, Oct 3
United Airlines Logo
7:00 am - 3:20 pm
PDX
-
BZN
7h 20m
1 stop
United Airlines Logo
4:30 pm - 9:10 pm
BZN
-
PDX
5h 40m
1 stop
$227United Airlines
Sat, Sep 26 - Wed, Sep 30
United Airlines Logo
8:40 am - 3:28 pm
PDX
-
BZN
5h 48m
1 stop
United Airlines Logo
4:22 pm - 10:57 pm
BZN
-
PDX
7h 35m
1 stop
$227United Airlines
Wed, Oct 21 - Wed, Nov 4
Delta Logo
5:49 pm - 10:37 pm
PDX
-
BZN
3h 48m
1 stop
Delta Logo
8:25 am - 12:09 pm
BZN
-
PDX
4h 44m
1 stop
$227Delta
Sat, Sep 26 - Wed, Sep 30
Southwest Logo
1:30 pm - 8:10 pm
PDX
-
BZN
5h 40m
1 stop
Southwest Logo
6:55 am - 2:05 pm
BZN
-
PDX
8h 10m
2 stops
$232Southwest
Wed, Oct 21 - Wed, Nov 4
Southwest Logo
6:00 am - 12:40 pm
PDX
-
BZN
5h 40m
1 stop
Southwest Logo
11:20 am - 7:15 pm
BZN
-
PDX
8h 55m
2 stops
$232Southwest
Wed, Sep 9 - Sat, Sep 19
Delta Logo
5:50 pm - 10:49 pm
PDX
-
BZN
3h 59m
1 stop
Delta Logo
6:00 am - 8:41 am
BZN
-
PDX
3h 41m
1 stop
$237Delta
Useful Info

Good to know

Low season

January

Cheapest flight

$104
Best time to beat the crowds with an average 57% drop in price.
Most popular time to fly and prices are also 26% lower on average.
Flight from Portland to Bozeman

When to book flights from Portland to Big Sky

Are your dates flexible? Find out the best times to travel from Portland to Big Sky based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

FAQs for booking flights from Portland to Big Sky

  • Which airports will I be using when flying from Portland to Big Sky?

    When flying out of Portland you’ll be using Portland. Big Sky does not have its own airport so you’ll be flying into nearby Bozeman Gallatin Field airport, which is 37.5 mi away.

  • How long does a flight from Portland to Big Sky take?

    Direct flights cover the 552 miles separating Portland and Big Sky in about 1h 40m.

  • How many flights are there between Portland and Big Sky?

    2 direct flights run between Portland and Big Sky on a daily basis. On average, there are about 14 departures each week.

  • What’s the cheapest day of the week to fly between Portland and Big Sky?

    Consider leaving on a Tuesday and avoid Saturdays if you are looking for the best rates. For your return to Portland, you’ll find the best rates on Saturdays and the most expensive ones on Sundays.

  • How does KAYAK find such low prices on flights from Portland to Big Sky?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Portland to Big Sky.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Portland to Big Sky?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Big Sky from Portland is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Portland to Big Sky?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Big Sky with an airline and back to Portland with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Portland to Big Sky?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Big Sky from Portland up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which airlines provide the cheapest flights from Portland to Big Sky?

    In the last 5 days, the cheapest one-way ticket between Portland and Big Sky found on KAYAK was with Delta for $78. Hawaiian Airlines offered a round-trip connection from $123 and Alaska Airlines from $137.

Top tips for finding cheap flights from Portland to Big Sky

  • There is no airport in Big Sky. Instead, you’ll be flying into Gallatin Field Airport when flying between Portland and Big Sky.
  • The cheapest flight from Portland to Big Sky was found 38 days before departure, on average.
  • Book at least 1 week before departure in order to get a below-average price.
  • High season is considered to be May, June and July. The cheapest month to fly is January.

Reviews of the top 4 airlines serving Portland to Big Sky

 
Need help choosing which airline to fly with from Portland to Big Sky? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
Alaska AirlinesOverall score based on 12761 reviews
8.1Boarding
7.8Comfort
7.0Entertainment
8.5Crew
7.0Food
Airline reviews

Worst travel day of my life. First bumped from our 7am flight—that we booked to ensure enough time to get to Chicago and get ready to go to a concert. Ended up on a flight 5hours later only to arrive in Chicago and spend 2 hours sitting in the tarmac. Missed the concert ($650 in tickets) and was too late to cancel the hotel ($500). I did receive a $200 voucher for the next Alaska ticket—soooo generous 👎. Would LOVE if Alaska reimbursed the $1000+that I am out!

2.0 MediocreJerilynn, Aug 2026
PDX - ORD
Read more Alaska Airlines reviews

Worst travel day of my life. First bumped from our 7am flight—that we booked to ensure enough time to get to Chicago and get ready to go to a concert. Ended up on a flight 5hours later only to arrive in Chicago and spend 2 hours sitting in the tarmac. Missed the concert ($650 in tickets) and was too late to cancel the hotel ($500). I did receive a $200 voucher for the next Alaska ticket—soooo generous 👎. Would LOVE if Alaska reimbursed the $1000+that I am out!

Clean plane, friendly crew, on time and relatively easy boarding. We did have to switch departure gates in Portland, but got enough notice that it wasn't a big hassle. Only wish Alaska offered more flights from Kansas City.

The aircraft pumps heat into the cabin in warm weather. High, prolonged discomfort. Not okay to put customers through that. Time to upgrade their fleet.

I would love it if Alaska Airlines brought back the complimentary beverage service on short flights

the flight was fine, But I paid extra for an Aisle seat both planes and did not get what I paid for when you pay an extra almost $80 and do not get the desired seats it was frustrating I don't fly much because of my legs need more room. thank you for your attention to this

Our seat assignments were mysteriously changed such that our boarding was delayed when they tried to fix it, but to no avail. It took more than 15 min. before we sat down. Then the catering delayed our plane for 35 min.

The flight was direct, anytime a flight is on time, and there's not a layover that risk yet another delay is a win!!

The flight 2161 was cancelled after repeated delays; for some reason the crew and not the tower located in Billings, Montana made the call. A cancelled flight is not a big deal, it happens. It was very disappointing that upon cancelling the flight it was a free for all to get to the counter for rebooking. Priority seating and first class ticket holders should have been giving priority to get on the next available flight. Most would agree that the process of moving states away, w/a cat, is stressful. A cancelled flight, 90 minutes to rebook, no place to stay, medication that was to be refrigerated and trying to find a local pet friendly hotel significantly added to the stress. Had I been able to rebook (per priority boarding SOP) I could have called the place I had just checked out of as my room most likely was just as I'd left it, including with pet supplies (which also had to be repurchased). While waiting to rebook, many of us called Alaska Airlines 800 number hoping to get a new flight; the waiting time -- this is not a joke -- was eight (8) hours, which dropped to "just" two (2) hours about 45-minutes later. Due to the cancellation I had to spend $268.75 and I still have not been refunded for the change in ticket (first class to regular). Each time I've call, five times now, the wait time was absurd, or a message of call back is given. Hopefully visiting the airport and talking with an agent face to face will be the final chapter to this experience. Alaska has been my go to air travel for years, hopefully this trip was just a hiccup. A system that forces customer's to spend hours of their time (money) to get a just due refund is not a working system. I suggest Alaska Airlines hire more representatives to handle calls; time is more valuable than money, spending 90 minutes to rebook a flight, without the difference being automatic is absurd. There are things called computers, they do amazing things. Once the flight was cancelled, only three agents were working to rebook the PAX, This too was unacceptable. First class ticket holders pay for first-class service, this should include rebooking on flights that are cancelled. I recall a time when flights were cancelled the airline would offer a hotel should the next flight not be until the following day? I had no idea that was no longer SOP; many could return home, several of us could not. The agents were pleasant once the PAX had their turn to rebook, this was true down in baggage area as well. The flight out the next day was also what I'd come to find of Alaska Airlines.

The actual flight I was rescheduled onto was from Seattle to Bozeman. The flight itself was fine, but due to delays/air traffic issues i spent the day hanging out at the Seattle airport and had to miss a day of work.

I think everything was just fine I wouldn't change nothing

We got stuck on the tarmac taxiing after landing early so we didn’t get off the plane until an hour later than we thought we would

Bus to plane was delayed for no apparent reason and our luggage was still on the belt when they shut it off. Took about 20 minutes to turn it back on to get our luggage.

I haven’t flown economy in over 20 years but it was not bad. Room by my feet for my bag and seat was roomy enough. Surprised in a good way.

Second flight in a row where the entertainment system is broken. 5 hour long flight with no entertainment and flight attendants did not seem interested in resolving the matter. Very shocked to be treated this poorly considering I paid for a first class experience and have Diamond Medallion status.

The service from the flight attendants were of supreme quality. They greeted and treated everyone with a wide smile. This is totally absent nowadays. Kudos to them!!!!

My seat had no padding, it was literally plywood with a plastic cover. I could not change seats on my 10 hour flight. My excitement for this trip helped me deal with the pain.

One of the best crews and best flights I’ve ever had! Really great experience

The flights were on time- Great service Would have liked more options for food choices.

The brakes on the A220 are sensitive and uncomfortably grabby

The bus ride from the terminal to board the plane is uncomfortable and stressful when making a connection.

They we able to seat my companion and I next to each other. Plane’s temperature was very cool. Willl be more prepared on return trip.

Plenty of overhead compartment room. The seat choice option is horrendous as best.

Flight delays - issues with delays waiting for a gate in Denver

I booked through Hawaiian which was supposed to have merged with Alaskan but offered free checked bags and said there would be seat selection at the airport. This was not honored by Alaskan Airlines and they even went out of their way to say “we are not Hawaiian and Hawaiian cannot pick seats on our airline ”. They told us that we could not change seats and that all tickets booked through Hawaiian were “saver fares”. The staff was rude and said that we would be helped last after they take care of the customers that booked through Alaskan. Once we got on the flight in our middle seats they played a message that said they have merged with Hawaiian and you can book on either website which would have been funny if we were not so uncomfortable. All in all it was a terrible experience and I do not recommend that anyone fly Alaskan unless they absolutely have to.

A cold sandwich would be much better than the warm gummy croissant.

Seats were so uncomfortable. Used to southwest so this was really disappointing. No wifi made for a long5 hour flight

It’s really tough when you purchase tickets and you are unable to purchase your seats, and just get random seats when you are traveling with someone.

Having enough fuel to get to our destination seems like it should be a given when you board a plane. Not in this case, delayed hours to refuel.

Almost everything was perfecto expect for entertainment. There are not a many options.

The screen where I sat was not working and charger also poorly. Can’t enjoy entertainments and space of seat was narrow.

the whole trip was smooth, and as comfortable as flying is these days. flight crew was friendly and very courteous and helpful.

Yet another flight in which beverage and snack service was skipped. Other that that, firmly mediocre. Landed early, to gate late due to congestion at the gates. Airline's fault or airports fault: unknown.

The flights were on time which was great give. It was holiday travel season and there’d been some weather issues. The only complaint and this is every time with United is the terrible seat design. The head rest is not built for comfort and having my neck bent forward for a cross country trip reminded me while I try not to take United flights as a rule.

This was a very average flight. The seat was out of alignment so more uncomfortable than usual. The cabin felt not well maintained. But I safely got where I needed to go.

We had a 90 minute delay due to equipment failure that was detected just before we took off. United rebooked my connecting flight.

Dinner was okay but the breakfast was not eatable on the flight San Francisco to Zurich.

This was a Lufthansa flight. Disappointing main meal. Very rough over Canada and arrival at FRA. IFE was almost unusable.

Poor seating comfort, seat cushion too thin, very uncomfortable. My luggage didi not make the flight due to equipment change. At least. United had it delivered the next day. I was without my toilet items for one day.

Flight cancelled because of the grounded 737s. United was good about it and got us onto a later Alaska Airlines flight to Oakland (not San Francisco as originally intended). Had to go through security again and my wife dropped her MacBook Pro, which broke, a $2,500 whoopsie. But we made it home.

I liked being upgraded to first class. The flight was a redeye, so I did sleep most of it.

Everything you need to know for your flight from Portland to Big Sky

Complete your trip to Big Sky with a hotel stay or car rental