$138 Cheap Flights from Great Falls (GTF) to Portland (PDX)

View $138 flight on Tue, Oct 14, 2025Opens in a new window

Popular airlines from Great Falls, MT (GTF-Great Falls Intl.) to Portland International Airport (PDX)

Cheap Flights from Great Falls to Portland (GTF-PDX)

Prices were available within the past 7 days and start at $138 for one-way flights and $258 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Hawaiian Airlines
Tue, Oct 21 - Tue, Oct 28
GTF
Great Falls
PDX
Portland
$258 Roundtrip, found 2 days ago
$258
Roundtrip
found 2 days ago
Select Hawaiian Airlines flight, departing Tue, Oct 21 from Great Falls to Portland, returning Tue, Oct 28, priced at $258 found 2 days ago
Hawaiian Airlines
Tue, Sep 9 - Sat, Sep 20
GTF
Great Falls
PDX
Portland
$268 Roundtrip, found 2 days ago
$268
Roundtrip
found 2 days ago
Select Hawaiian Airlines flight, departing Tue, Sep 9 from Great Falls to Portland, returning Sat, Sep 20, priced at $268 found 2 days ago
Hawaiian Airlines
Tue, Oct 14 - Tue, Oct 28
GTF
Great Falls
PDX
Portland
$269 Roundtrip, found 9 hours ago
$269
Roundtrip
found 9 hours ago
Select Hawaiian Airlines flight, departing Tue, Oct 14 from Great Falls to Portland, returning Tue, Oct 28, priced at $269 found 9 hours ago
Delta
Sat, Sep 6 - Tue, Sep 16
GTF
Great Falls
PDX
Portland
$273 Roundtrip, found 2 days ago
$273
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, Sep 6 from Great Falls to Portland, returning Tue, Sep 16, priced at $273 found 2 days ago
Delta
Tue, Sep 23 - Tue, Sep 30
GTF
Great Falls
PDX
Portland
$274 Roundtrip, found 5 days ago
$274
Roundtrip
found 5 days ago
Select Delta flight, departing Tue, Sep 23 from Great Falls to Portland, returning Tue, Sep 30, priced at $274 found 5 days ago
Alaska Airlines
Mon, Oct 13 - Tue, Oct 28
GTF
Great Falls
PDX
Portland
$278 Roundtrip, found 9 hours ago
$278
Roundtrip
found 9 hours ago
Select Alaska Airlines flight, departing Mon, Oct 13 from Great Falls to Portland, returning Tue, Oct 28, priced at $278 found 9 hours ago
Alaska Airlines
Wed, Nov 5 - Sat, Nov 22
GTF
Great Falls
PDX
Portland
$280 Roundtrip, found 3 days ago
$280
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Wed, Nov 5 from Great Falls to Portland, returning Sat, Nov 22, priced at $280 found 3 days ago
Alaska Airlines
Tue, Oct 14 - Tue, Oct 21
GTF
Great Falls
PDX
Portland
$284 Roundtrip, found 6 hours ago
$284
Roundtrip
found 6 hours ago
Select Alaska Airlines flight, departing Tue, Oct 14 from Great Falls to Portland, returning Tue, Oct 21, priced at $284 found 6 hours ago
Hawaiian Airlines
Tue, Oct 21 - Fri, Oct 31
GTF
Great Falls
PDX
Portland
$288 Roundtrip, found 2 days ago
$288
Roundtrip
found 2 days ago
Select Hawaiian Airlines flight, departing Tue, Oct 21 from Great Falls to Portland, returning Fri, Oct 31, priced at $288 found 2 days ago
United
Tue, Sep 23 - Sat, Oct 4
GTF
Great Falls
PDX
Portland
$480 Roundtrip, found 3 hours ago
$480
Roundtrip
found 3 hours ago
Select United flight, departing Tue, Sep 23 from Great Falls to Portland, returning Sat, Oct 4, priced at $480 found 3 hours ago

Find the cheapest month to fly from Great Falls (GTF) to Portland (PDX)

January is typically the cheapest month to fly

From $201 - $700 per traveler.

Graph displaying average flight prices per month

Flights from Great Falls (GTF) to Portland (PDX)
Origin airport
Great Falls Intl.
Destination airport
Portland Intl.
Airlines serving
Alaska Airlines, Delta, Hawaiian Airlines, United
Roundtrip price
$257
Distance
549 mi

Great Falls to Portland Flights

The cheapest times to fly from Great Falls to Portland

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Great Falls to Portland are during the month of October. You can find some of the cheapest flights from Great Falls to Portland with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Great Falls to Portland

Sunday is one of the best days to book for cheap flights from Great Falls to Portland: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Great Falls to Portland

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Great Falls to Portland in 2025. You can also book with separate airlines for your outbound and return journeys, from $138 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Great Falls to Portland flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Great Falls to Portland airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Great Falls Intl. Airport (GTF) to Portland Intl. Airport (PDX) cost?
Secure a cheap one-way flight from $138 or cheap return flight from $258 from Great Falls Intl. Airport (GTF) to Portland Intl. Airport (PDX) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Great Falls Intl. Airport (GTF) to Portland Intl. Airport (PDX)?
The cheapest month to fly from GTF to PDX is October, when there's less demand. Off-peak season is generally when you'll find cheap fares for travel between these airports.
What is the cheapest airline that flies from Great Falls Intl. Airport (GTF) to Portland Intl. Airport (PDX)?
Use the filters on Expedia to compare airlines and find the most affordable carrier that'll take you from GTF to PDX. Then, sort your results by "Price (lowest to highest)" to score the best deal available.
How many flights per day from Great Falls Intl. Airport (GTF) to Portland Intl. Airport (PDX)?
You'll need to take a flight with a layover when traveling from Great Falls Intl. Airport (GTF) to Portland Intl. Airport (PDX). There are no daily direct flights on this route. However, simply filter your search to include one or more stops to find an option that works for you.
What day of the week has the most flights from GTF to PDX?
Typically you'll find the largest variety of flight choices on a Friday. Tuesdays are often the quietest.* However, this can change depending on the airline, season and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Great Falls Intl. Airport (GTF) to Portland Intl. Airport (PDX)?
To avoid possible delays on the Great Falls Intl. Airport (GTF) to Portland Intl. Airport (PDX) route, aim to travel before 3 PM. Flights after this time are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Great Falls Intl. Airport (GTF) to Portland Intl. Airport (PDX) last-minute?
Booking your ticket from GTF to PDX right before your trip is typically more expensive. But if there's some wiggle room with your itinerary, you could snag a cheap last-minute fare.
Is it cheaper to book a GTF to PDX flight and hotel package?
You'll typically save money by booking a GTF to PDX flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one place. After selecting your preferred flights and accommodations, consider adding extras including activities, tours and car rentals.
Can I cancel or change the date of my flight from Great Falls Intl. Airport (GTF) to Portland Intl. Airport (PDX)?
If you booked your GTF to PDX flight in the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the fare type you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

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*Available to One Key members.