Robert Gray Army Air Field is served by 3 airlines, flying from/to 2 destinationsLongest flight from Robert Gray Army Air Field is Fort Cavazos (Killeen) to 🇺🇸 Dallas-Fort Worth (DFW), which takes around 50 minutes. On an airline like Envoy Air. More info on this flight route (GRK-DFW).Shortest flight from Robert Gray Army Air Field is Fort Cavazos (Killeen) to 🇺🇸 Dallas-Fort Worth (DFW), which takes around 50 minutes. On an airline like Envoy Air. More info on this flight route (GRK-DFW).