$163 Cheap United flights Great Falls (GTF) to San Antonio (SAT)

Scoring cheap one-way United Airlines flights from GTF to SAT from $163 on Expedia couldn’t be easier — just filter by “Price (lowest to highest).” Alternatively, check out our affordable round-trip fares from $361 for your next exciting adventure.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

January is one of the cheapest months to travel to San Antonio with United Airlines. You could also find fantastic deals on return and one-way tickets in September.

Start searching one to three months before your departure to score cheap fares on United Airlines flights from Great Falls Intl. Airport (GTF) to San Antonio Intl. Airport (SAT). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to last-minute reservations made 6 to 12 days out. You could also reduce costs by buying your fare on a Sunday, as it’s 6% cheaper on average than a Monday, the most expensive day to book.* Time it well, and you can enjoy significant savings on domestic trips.*Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

Select our “Nonstop” filter when looking for direct United Airlines flights from GTF to SAT. You’ll also be able to compare other carriers offering the same nonstop trip.

To find the earliest departure from GTF to SAT with United Airlines, sort your results by “Early Morning” and “Morning.” Booking an early flight usually means cancellations are less likely.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Jump on a United Airlines flight from Great Falls Intl. Airport (GTF) to San Antonio, and you’re most likely to touch down at San Antonio Intl. Airport (SAT). This is the airline’s main hub here.

With a rewarding loyalty program, United Airlines is a favorite of many travelers heading from GTF to SAT. Plus, as a United Mileage Plus and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights along with your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

You can usually cancel or reschedule your flight, although additional fees may apply if your booking was made over 24 hours ago. Prefer to keep your options open? Use our “Changes included” and “No cancel fee” filters to find flights that won’t penalize you if you have to revise your plans. To modify your booking, go to “Trips,” select your flight and click on “Manage Booking” for further information.