The Worldwide Slot Guidelines (WSG) are the foundation upon which the global slot allocation process works for the benefit of airlines, airports and the passengers. IATA ensures it evolves with the industry to continue to optimize the use of scarce airport capacity for all. The WSG is built on the pillars of transparency, flexibility, certainty, consistency and sustainability.

Thanks to continual update and revision, the WSG represent the globally accepted best practice for governments and airport regulators. The guidelines ensure that slots at capacity-constrained airports around the world are allocated to airlines using consistent policies, principles and processes.