Great Falls International Airport is served by 6 airlines, flying from/to 7 destinationsLongest flight from Great Falls International Airport is Great Falls to 🇺🇸 Memphis (MEM), which takes around 2 hours and 50 minutes. On an airline like FedEx Express. More info on this flight route (GTF-MEM).Shortest flight from Great Falls International Airport is Great Falls to 🇺🇸 Billings (BIL), which takes around 50 minutes. On an airline like Alpine Air Express. More info on this flight route (GTF-BIL).