A landing or takeoff slot is simply a small window of time in which your aircraft is scheduled to fly in or out of the airport. You will need a landing and takeoff slot if you fly to a high-density airport in the United States or one that is hosting a special event with a significant number of aircraft arriving and departing. If you’re flying internationally, you will need a landing and takeoff slot for all major European cities. Please check with your Paramount Aviation Advisor at the time of booking for a specific route.