Described herein are systems and methods for allocating departure slots at an airport. One embodiment of the disclosure of this application is related to a method including calculating an estimated takeoff time (“ETT”) based on airport data and flight plan data, allocating a departure slot time for the at least one flight based on the ETT, and populating the allocated departure slot time in an allocation grid. Another embodiment of the disclosure of this application is related to a system comprising a user interface displaying information related to flight plan data and airport data received from an airport network, and a departure allocation module calculating an estimated takeoff time (“ETT”) for the first flight based on the airport data and the flight plan data, allocating a departure slot time for the flight, and populating the departure slot time in an allocation grid via the user interface.