Cheap Flights from Portland to Great Falls International

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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 $769. Find the lowest prices on one-way and return tickets right here.

Great Falls.$667 per passenger.Departing Wed, 2 Dec, returning Wed, 9 Dec.Return flight with Delta.Outbound indirect flight with Delta, departs from Portland on Wed, 2 Dec, arriving in Great Falls International.Inbound indirect flight with Delta, departs from Great Falls International on Wed, 9 Dec, arriving in Portland.Price includes taxes and charges.From $667, select.

Great Falls.$667 per passenger.Departing Tue, 5 Jan, returning Tue, 12 Jan.Return flight with Delta.Outbound indirect flight with Delta, departs from Portland on Tue, 5 Jan, arriving in Great Falls International.Inbound indirect flight with Delta, departs from Great Falls International on Tue, 12 Jan, arriving in Portland.Price includes taxes and charges.From $667, select.

Great Falls.$769 per passenger.Departing Mon, 19 Oct, returning Fri, 23 Oct.Return flight with Delta.Outbound indirect flight with Delta, departs from Portland on Mon, 19 Oct, arriving in Great Falls International.Inbound indirect flight with Delta, departs from Great Falls International on Fri, 23 Oct, arriving in Portland.Price includes taxes and charges.From $769, select.

Great Falls.$1,012 per passenger.Departing Sun, 27 Sep, returning Sat, 3 Oct.Return flight with Delta.Outbound indirect flight with Delta, departs from Portland on Sun, 27 Sep, arriving in Great Falls International.Inbound indirect flight with Delta, departs from Great Falls International on Sat, 3 Oct, arriving in Portland.Price includes taxes and charges.From $1,012, select.

Great Falls.$1,147 per passenger.Departing Thu, 17 Sep, returning Mon, 21 Sep.Return flight with Delta.Outbound indirect flight with Delta, departs from Portland on Thu, 17 Sep, arriving in Great Falls International.Inbound indirect flight with Delta, departs from Great Falls International on Mon, 21 Sep, arriving in Portland.Price includes taxes and charges.From $1,147, select.

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 December.

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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.

Great Falls International

5km from central Great Falls

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from $667

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Portland to Great Falls: Flight information

The things to know before you go.

Cheapest flight found	$667
Cheapest month to fly	January

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

How much are return flights from Portland to Great Falls International?

The best price we found for a return flight from Portland to Great Falls International is $667. 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.

Which airlines fly direct from Portland to Great Falls International?

Currently, there are no airlines that fly direct from Portland to Great Falls International. But we found flights with one or more stops from $667.

How many flights are there a week from Portland to Great Falls International?

As of September 2026, there are no flights flying from Portland to Great Falls International.

When is the cheapest time to fly from Portland to Great Falls International?

The cheapest month to fly from Portland to Great Falls International is usually January.

Which upcoming date is cheapest to fly from Portland Airport to Great Falls International Airport on?

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 Tuesday, 5 January 2027.

Can I get a direct flight from Portland Airport to Great Falls International Airport?

No airlines currently offer direct flights between Portland Airport and Great Falls International Airport. Most routes have one or more stops.

How can I find the best flight deal to Great Falls International?

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.

When is the best time to book flights to Great Falls?

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.

Which is the cheapest airline to fly from Portland Airport to Great Falls International with?

Currently, Delta offers the cheapest flight tickets to Great Falls International.

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

Your PDX to GTF flight won't wait if you're running late, so get to the airport with time to spare. Arrive up to one hour in advance for domestic flights and two hours ahead for international travel.
Travelling during a peak time like July? Major public holidays and other popular seasons can result in longer lines and delays at check-in and security. Play it safe and get there up to four hours before an international flight and two hours before a domestic departure.
If you want to add a stop to your trip, just deselect 'Direct flights only' when searching for your ticket from Portland Airport to Great Falls International Airport. Here are the most popular stopovers between PDX and GTF:
- Denver International Airport
- Minneapolis St Paul Airport
- Salt Lake City Airport

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

Right now, $384 is the cheapest price we've found for a one-way Portland Airport to Great Falls International Airport flight. The best price for a return plane ticket is $667. Keep in mind that fares could change due to availability at the time of booking.
To get your hands on cheap tickets from PDX to GTF, book in advance. Airlines generally offer the most competitive fares when flights are first made available.
If you're willing to be flexible with your trip dates, try using the 'Whole month' search tool. It'll show you the lowest price across the month when searching for your flight from Portland Airport to Great Falls International Airport.
You don't need to check back in every day to find out if fares have gone down when you create a Price Alert. We'll send you an update the moment there's a change in price on cheap flights from PDX to GTF.
Choose your ideal departure and arrival times, number of stops and airlines with the filters. Alternatively, sort your results by 'Cheapest' to see the best deals on flights from Portland Airport to Great Falls International Airport.

Handy information about Portland Airport (PDX)

PDX is located at 7000 NE Airport Way.
83% of flights departing from Portland Airport land at their destination according to schedule. Given its strong performance rating, disruptions are unlikely when taking off from PDX.
To reach Portland Airport from central Portland, it'll take about 20 minutes if you're going by car. This depends on traffic, however. It's approximately 19 kilometres from the airport to the city centre.
The journey on public transport usually takes 40 minutes.
Get your journey off to a hassle-free start by staying near PDX. Whether you're boarding an early flight from Portland Airport to Great Falls International Airport or just don't like being rushed, these stays have you covered:

Arriving at Great Falls International Airport (GTF)

If you have a late Portland Airport to Great Falls International Airport flight, nothing tops the convenience of being close to the terminal. Collect your bags from the carousel and then be resting shortly after at one of these accommodation options near GTF:
Explore without limits with a Great Falls International Airport rental car. Pick up your wheels from Alamo, Budget or Hertz and find adventure across Great Falls and beyond.
Increase your likelihood of snagging the best possible rate by booking as soon as possible. Reserving your ride from Great Falls International Airport several weeks in advance is a good move.

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

You'll find GTF at 2800 Terminal Drive.
Great Falls International Airport to central Great Falls has a drive time of about 10 minutes. It's approximately 8 kilometres away.
If you're taking public transport, expect a journey time of about 25 minutes.

When to fly to Great Falls International Airport (GTF)

It's time to work out your travel dates for your flight from Portland Airport to Great Falls International Airport. July is the most popular month to head to Great Falls. If you'd like a more low-key vibe, go in March.
The warmest month in Great Falls is July, with temperatures ranging between 11ºC and 33ºC. Lock in your flights from Portland Airport to Great Falls International Airport in this month if this is the type of weather you like.
February has average temperatures of between -21ºC and 8ºC. Look for cheap tickets from PDX to GTF sometime around then if you like travelling in cooler conditions.

Explore more of the United States

You've seen Great Falls, now it's time to explore other corners of the United States. Travel about 467 kilometres west to Spokane to check off its top sights. From Riverside State Park to Spokane Falls (Upper Falls) and Cathedral of Our Lady of Lourdes, there's plenty to keep you on the go.
If there's time to check out another corner of the United States, head for Billings, about 290 kilometres south-east of Great Falls. Museum of Women's History, Yellowstone Art Museum and The Rimrocks are key highlights.