How early should I arrive at Billings Logan International Airport?

Billings Logan International Airport (BIL) is Montana’s largest airport, serving Billings and the surrounding Yellowstone County area with a single terminal complex handling both domestic and regional flights. Major carriers based at or operating regular service include Alaska Airlines, Delta, United and American, offering frequent connections to hubs such as Denver, Salt Lake City, Seattle and Minneapolis. Travelers can use the airport’s online flight board (online flight board) to check arrivals (arrivals) and departures (departures), find rental cars, parking and ground transportation, and access TSA checkpoints and basic passenger amenities within a compact, easy-to-navigate layout.