Cheap Flights from Portland to Great Falls International

Compare Portland to Great Falls International flight deals

Find the cheapest month or even day of the year to fly to Great Falls International

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Flight deals from Portland to Great Falls International

Looking for a cheap last-minute deal or the best return flight from Portland Airport to Great Falls International Airport? If you want to travel next month, return fares start from Rs91,390. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Portland to Great Falls International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Portland to Great Falls International flights are currently cheapest in June.

Portland to Great Falls International: Alternative routes

Compare routes from Portland to Great Falls below. You may find an airport to fly into that's cheaper, faster, or easier than Great Falls International.

Portland to Great Falls: Flight information

The things to know before you go.
Cheapest flight foundRs45,581
Cheapest month to flyJune

Finding cheap flights from Portland to Great Falls International: Frequently asked questions

The best price we found for a return flight from Portland to Great Falls International is Rs91,390. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Portland to Great Falls International. But we found flights with one or more stops from Rs91,390.
As of May 2026, there are no flights flying from Portland to Great Falls International.
The cheapest month to fly from Portland to Great Falls International is usually June.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Portland Airport to Great Falls International Airport on Thursday, 4 June 2026.
No airlines currently offer direct flights between Portland Airport and Great Falls International Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Great Falls International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Great Falls is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Frontier Airlines offers the cheapest flight tickets to Great Falls International.

Travelling from Portland International Airport (PDX) to Great Falls International Airport (GTF): what you need to know

  • Arriving two hours before an international flight and one hour ahead of a domestic departure are travel rules worth sticking to. Get to the airport on time to catch your PDX to GTF flight.

  • You'll likely experience longer queues in popular months like July. Arriving up to four hours in advance for an international flight and two hours for a domestic departure is a good idea.

  • Consider adding a stopover when booking your ticket from Portland International Airport to Great Falls International Airport. Simply uncheck 'Direct flights only' to break up your journey, or maybe even explore a new city along the way. Here are some options between PDX and GTF:

    • Salt Lake City International Airport

    • Denver International Airport

    • Minneapolis-St. Paul International Airport

How to find the cheapest flights from Portland International Airport (PDX) to Great Falls International Airport (GTF)

  • The lowest price we've seen for a one-way Portland International Airport to Great Falls International Airport flight is Rs45,581. A return fare is currently Rs91,390. Depending on the availability and when you book, these fares could change.

  • Don't wait until the last minute. You're more likely to get cheap tickets from PDX to GTF if you book early. Airlines often have some excellent early bird deals.

  • The 'Whole month' search function shows you the cheapest flights from Portland International Airport to Great Falls International Airport throughout the entire month. It's a good way to snap up a bargain if your dates are flexible.

  • Never miss a deal on cheap flights from PDX to GTF by setting up a Price Alert. You'll receive an email or notification through the app when a lower fare pops up.

  • Choose your preferred departure and arrival times, airlines and number of stops with the filters. Alternatively, sort your results by 'Cheapest' to see the best deals on flights from Portland International Airport to Great Falls International Airport.

Handy information about Portland International Airport (PDX)

  • You'll find PDX at 7000 NE Airport Way.

  • Portland International Airport gets high marks for on-time performance. 83.65% of flights that take off from PDX reach their destination without delay.

  • Portland International Airport is about 19 kilometres from central Portland. If you're driving, catching a cab or ride-sharing from the centre, it'll take you 20 minutes or so to get there, depending on the traffic.

  • The trip when using public transport typically takes 45 minutes.

  • Get your trip off to a relaxed start by staying near PDX. Whether you have an early flight from Portland International Airport to Great Falls International Airport or just don't want to be rushed, these stays are the answer:

Arriving at Great Falls International Airport (GTF)

Getting from Great Falls International Airport (GTF) to central Great Falls

  • GTF is located at 2800 Terminal Drive.

  • Great Falls International Airport to the centre of Great Falls has a drive time of around 10 minutes. It's approximately 8 kilometres away.

  • When travelling on public transport, expect a journey time of about 4 hours.

When to fly to Great Falls International Airport (GTF)

  • August is the most popular month for flights from Portland International Airport to Great Falls International Airport. To skip the crowds, travel to Great Falls in February.

  • The warmest month in Great Falls is July, with temperatures ranging between 11ºC and 33ºC. Lock in your flights from Portland International Airport to Great Falls International Airport in this month if you like this kind of weather.

  • If you want to travel in cooler conditions, search for a cheap ticket from PDX to GTF in February. Average temperatures are between -21ºC and 8ºC then.

Explore more of United States

  • Spokane is just one of the many places in United States waiting to be discovered after you've experienced Great Falls. Around 467 kilometres away to the west, its top attractions include Manito Park, Northwest Museum of Arts & Culture and Spokane Falls.

  • Billings is another essential stop in United States and is around 290 kilometres south-east of Great Falls. No journey is complete without visiting Pictograph Cave State Park, Moss Mansion and Yellowstone Art Museum.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.