Your airport is limited to a maximum of two runways. As you progress to new levels, you'll get the opportunity to enhance your runways, allowing you to handle various types of planes for takeoff.
The Runway area is divided into two parts: the actual runways and the bearing tracks. These bearing tracks help planes navigate during takeoff and landing without any collisions.
When you have multiple planes ready for takeoff at the same time, don't worry. Each plane will smoothly find its place on a bearing track and take off one after another on its journey.