Which Airbus aircraft typically cruise between FL290-FL390?

The Airbus A319, A320, and A321 are part of the A320 Family, which is designed for short to medium-haul flights. These aircraft typically cruise at altitudes ranging from FL290 to FL390, making them well-suited for commercial operations on domestic and regional routes.

Their operational efficiency at these altitudes allows for an optimal balance between fuel economy and air traffic management.

In comparison, other aircraft listed in the options are generally designed for different flight profiles. The A350 and A380 are long-haul aircraft that usually cruise at higher altitudes, often exceeding FL390. The A300 and A310 are older models then, while the A330 and A340 are capable of cruising at similar altitudes but are primarily used for long-haul flights, routinely operating at FL350 and above. Therefore, the A320 Family's typical cruising altitude distinctly aligns with the question's specified range.