American Airlines operates from the main terminal building at Nashville International Airport (BNA). Passengers wondering What Terminal is American Airlines at Nashville Airport should know that BNA has one main terminal with multiple concourses, including Concourses A, B, C, and D. The airline’s check-in and departure arrangements may vary depending on the flight, so travelers should review their booking confirmation or boarding pass before arriving. Checking the airport flight information screens can also help passengers find the correct departure gate. Arriving early gives you enough time to complete check-in, drop off luggage, and pass through security without unnecessary stress.