$924 Cheap Flights from Oslo (OSL) to Great Falls (GTF)

View $924 flight on Sat, Nov 8, 2025Opens in a new window

Popular airlines from Gardermoen Airport (OSL) to Great Falls, MT (GTF-Great Falls Intl.)

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Cheap Flights from Oslo to Great Falls (OSL-GTF)

Prices were available within the past 7 days and start at $924 for one-way flights and $801 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Jul 22 - Sun, Aug 3
OSL
Oslo
GTF
Great Falls
$801 Roundtrip, found 5 days ago
$801
Roundtrip
found 5 days ago
Select United flight, departing Tue, Jul 22 from Oslo to Great Falls, returning Sun, Aug 3, priced at $801 found 5 days ago
United
Tue, Jul 22 - Sat, Aug 2
OSL
Oslo
GTF
Great Falls
$863 Roundtrip, found 5 days ago
$863
Roundtrip
found 5 days ago
Select United flight, departing Tue, Jul 22 from Oslo to Great Falls, returning Sat, Aug 2, priced at $863 found 5 days ago
United
Mon, Jul 21 - Sun, Aug 3
OSL
Oslo
GTF
Great Falls
$902 Roundtrip, found 5 days ago
$902
Roundtrip
found 5 days ago
Select United flight, departing Mon, Jul 21 from Oslo to Great Falls, returning Sun, Aug 3, priced at $902 found 5 days ago
United
Tue, Jul 22 - Mon, Jul 28
OSL
Oslo
GTF
Great Falls
$952 Roundtrip, found 5 days ago
$952
Roundtrip
found 5 days ago
Select United flight, departing Tue, Jul 22 from Oslo to Great Falls, returning Mon, Jul 28, priced at $952 found 5 days ago
United
Mon, Jul 21 - Sat, Aug 2
OSL
Oslo
GTF
Great Falls
$964 Roundtrip, found 5 days ago
$964
Roundtrip
found 5 days ago
Select United flight, departing Mon, Jul 21 from Oslo to Great Falls, returning Sat, Aug 2, priced at $964 found 5 days ago
Delta
Thu, Jul 24 - Sun, Jul 27
OSL
Oslo
GTF
Great Falls
$971 Roundtrip, found 5 days ago
$971
Roundtrip
found 5 days ago
Select Delta flight, departing Thu, Jul 24 from Oslo to Great Falls, returning Sun, Jul 27, priced at $971 found 5 days ago
United
Sat, Jul 26 - Sun, Aug 3
OSL
Oslo
GTF
Great Falls
$974 Roundtrip, found 5 days ago
$974
Roundtrip
found 5 days ago
Select United flight, departing Sat, Jul 26 from Oslo to Great Falls, returning Sun, Aug 3, priced at $974 found 5 days ago
Air France
Mon, Jul 21 - Sun, Jul 27
OSL
Oslo
GTF
Great Falls
$998 Roundtrip, found 5 days ago
$998
Roundtrip
found 5 days ago
Select Air France flight, departing Mon, Jul 21 from Oslo to Great Falls, returning Sun, Jul 27, priced at $998 found 5 days ago
Delta
Thu, Jul 24 - Wed, Jul 30
OSL
Oslo
GTF
Great Falls
$998 Roundtrip, found 5 days ago
$998
Roundtrip
found 5 days ago
Select Delta flight, departing Thu, Jul 24 from Oslo to Great Falls, returning Wed, Jul 30, priced at $998 found 5 days ago
KLM
Sat, Jul 26 - Sun, Jul 27
OSL
Oslo
GTF
Great Falls
$1,021 Roundtrip, found 5 days ago
$1,021
Roundtrip
found 5 days ago
Select KLM flight, departing Sat, Jul 26 from Oslo to Great Falls, returning Sun, Jul 27, priced at $1,021 found 5 days ago
Flights from Oslo (OSL) to Great Falls (GTF)
Origin airport
Gardermoen
Destination airport
Great Falls Intl.
Roundtrip price
$801
Distance
4329 mi

Oslo to Great Falls Flights

The cheapest times to fly from Oslo to Great Falls

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 Oslo to Great Falls are during the month of July. You can find some of the cheapest flights from Oslo to Great Falls with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Oslo to Great Falls: 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 Oslo to Great Falls

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 Oslo to Great Falls in 2025. You can also book with separate airlines for your outbound and return journeys, from $924 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 Oslo to Great Falls 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 Oslo to Great Falls 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 Gardermoen Airport (OSL) to Great Falls Intl. Airport (GTF) cost?
Discover the latest flight deals from OSL to GTF by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from OSL to GTF?
The cheapest flights from OSL to GTF are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from OSL to GTF?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from OSL to GTF. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Gardermoen Airport (OSL) to Great Falls Intl. Airport (GTF)?
Direct flights from Gardermoen Airport (OSL) to Great Falls Intl. Airport (GTF) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel details and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from OSL to GTF?
Friday is typically the busiest day for flights, while Tuesday tends to be the quietest.* Remember that flight schedules can change based on various factors, including the airline and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Gardermoen Airport (OSL) to Great Falls Intl. Airport (GTF)?
To arrive at Great Falls Intl. Airport (GTF) on time, choose a flight that takes off from Gardermoen Airport (OSL) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**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 Gardermoen Airport (OSL) to Great Falls Intl. Airport (GTF) last-minute?
Waiting until just before your departure to book a ticket from OSL to GTF generally means paying more. While you might find some last-minute discounts, there's no guarantee. Allow some flexibility in your schedule to maximize your chances of landing a bargain.
Is it cheaper to book an OSL to GTF flight and hotel package?
Compared with arranging hotels and flights separately, booking an OSL to GTF flight and hotel package with Expedia could result in significant savings. Better yet, having everything in one easy place takes the hassle out of planning your trip. Simply secure your flights and select from our wide range of stays, then customize your trip with other add-ons like activities, tours and car rentals.
Can I cancel or change the date of my flight from Gardermoen Airport (OSL) to Great Falls Intl. Airport (GTF)?
In most cases, you're able to reschedule or cancel your OSL to GTF flight. However, additional fees may apply, especially if you made your booking over 24 hours ago. Check your itinerary for the airline's policies and fees on flight changes, or if you'd like more details, go to our Customer Service portal.

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*Available to One Key members.