$117 Cheap Flights from Great Falls (GTF) to San Francisco (SFO)

View $117 flight on Wed, May 14, 2025Opens in a new window

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Find available prices by choosing your travel dates.

Cheap Flights from Great Falls to San Francisco (GTF-SFO)

Prices were available within the past 7 days and start at $117 for one-way flights and $234 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, May 13 - Sat, May 17
GTF
Great Falls
SFO
San Francisco
$234 Roundtrip, found 22 hours ago
$234
Roundtrip
found 22 hours ago
Select Delta flight, departing Tue, May 13 from Great Falls to San Francisco, returning Sat, May 17, priced at $234 found 22 hours ago
Alaska Airlines
Thu, May 29 - Sun, Jun 1
GTF
Great Falls
SFO
San Francisco
$238 Roundtrip, found 5 days ago
$238
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Thu, May 29 from Great Falls to San Francisco, returning Sun, Jun 1, priced at $238 found 5 days ago
Delta
Sat, May 24 - Fri, Jun 6
GTF
Great Falls
SFO
San Francisco
$240 Roundtrip, found 4 days ago
$240
Roundtrip
found 4 days ago
Select Delta flight, departing Sat, May 24 from Great Falls to San Francisco, returning Fri, Jun 6, priced at $240 found 4 days ago
Alaska Airlines
Thu, May 29 - Sun, Jun 1
GTF
Great Falls
SFO
San Francisco
$262 Roundtrip, found 1 day ago
$262
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Thu, May 29 from Great Falls to San Francisco, returning Sun, Jun 1, priced at $262 found 1 day ago
Delta
Sat, May 24 - Thu, Jun 12
GTF
Great Falls
SFO
San Francisco
$267 Roundtrip, found 4 days ago
$267
Roundtrip
found 4 days ago
Select Delta flight, departing Sat, May 24 from Great Falls to San Francisco, returning Thu, Jun 12, priced at $267 found 4 days ago
Hawaiian Airlines
Tue, May 20 - Wed, May 21
GTF
Great Falls
SFO
San Francisco
$268 Roundtrip, found 1 day ago
$268
Roundtrip
found 1 day ago
Select Hawaiian Airlines flight, departing Tue, May 20 from Great Falls to San Francisco, returning Wed, May 21, priced at $268 found 1 day ago
Alaska Airlines
Thu, May 29 - Sun, Jun 1
GTF
Great Falls
SFO
San Francisco
$269 Roundtrip, found 1 day ago
$269
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Thu, May 29 from Great Falls to San Francisco, returning Sun, Jun 1, priced at $269 found 1 day ago
Delta
Thu, May 29 - Sun, Jun 1
GTF
Great Falls
SFO
San Francisco
$274 Roundtrip, found 5 days ago
$274
Roundtrip
found 5 days ago
Select Delta flight, departing Thu, May 29 from Great Falls to San Francisco, returning Sun, Jun 1, priced at $274 found 5 days ago
Delta
Tue, Jun 17 - Sun, Jun 22
GTF
Great Falls
SFO
San Francisco
$276 Roundtrip, found 2 days ago
$276
Roundtrip
found 2 days ago
Select Delta flight, departing Tue, Jun 17 from Great Falls to San Francisco, returning Sun, Jun 22, priced at $276 found 2 days ago
United
Tue, May 20 - Fri, May 23
GTF
Great Falls
SFO
San Francisco
$555 Roundtrip, just found
$555
Roundtrip
just found
Select United flight, departing Tue, May 20 from Great Falls to San Francisco, returning Fri, May 23, priced at $555 just found
Flights from Great Falls (GTF) to San Francisco (SFO)
Origin airport
Great Falls Intl.
Destination airport
San Francisco Intl.
Airlines serving
Alaska Airlines, Delta, United
Roundtrip price
$234
Distance
881 mi

Great Falls to San Francisco Flights

The cheapest times to fly from Great Falls to San Francisco

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

The best time to book a flight from Great Falls to San Francisco

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

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 San Francisco in 2025. You can also book with separate airlines for your outbound and return journeys, from $117 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 San Francisco 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 San Francisco 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 San Francisco Intl. Airport (SFO) cost?
Discover the latest flight deals from GTF to SFO 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 GTF to SFO?
The cheapest flights from GTF to SFO 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 GTF to SFO?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from GTF to SFO. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Great Falls Intl. Airport (GTF) to San Francisco Intl. Airport (SFO)?
Nonstop flights from Great Falls Intl. Airport (GTF) to San Francisco Intl. Airport (SFO) aren’t available daily, so you’ll have to take a flight with a layover. Explore your options with Expedia’s filters. Enter your travel details and select either “1 Stop” or “2+ Stops.”
What day of the week has the most flights from GTF to SFO?
Friday is usually the busiest day for flights, while Tuesday tends to be the quietest.* Keep in mind that flight schedules can vary depending on various factors, such as the time of year and carrier.*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 San Francisco Intl. Airport (SFO)?
Book a flight from Great Falls Intl. Airport (GTF) to San Francisco Intl. Airport (SFO) that takes off before 3 PM to reduce the risk of cancellations and delays. Departures after this time have a 22% higher chance of being canceled, on average.**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 San Francisco Intl. Airport (SFO) last-minute?
Booking your plane ticket from GTF to SFO shortly before your getaway is typically more expensive. But if there’s some wiggle room with your travel times and dates, you could snag a cheap last-minute fare.
Is it cheaper to book a GTF to SFO flight and hotel package?
Opting for a GTF to SFO flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels in one place. Select from our impressive range of stays and then add activities, car rentals and flights to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Great Falls Intl. Airport (GTF) to San Francisco Intl. Airport (SFO)?
In most cases, you can modify or cancel your GTF to SFO flight. However, additional fees may apply, especially if your booking was made more than 24 hours ago. Check your itinerary for the airline’s guidelines and fees on flight changes, or if you need more details, head to our Customer Service portal.

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*Available to One Key members.