The Worldwide Airport Slot Guidelines (WASG) are the foundation upon which the global slot allocation process works for the benefit of airlines, airports and consumers. The WASG is jointly published by IATA, Airports Council International (ACI) and the Worldwide Airport Coordinators Group (WWACG). The WASG is built on the pillars of transparency, flexibility, certainty, consistency and sustainability.
From 1 June 2020 the WASG is jointly published by IATA, Airports Council International (ACI) and the Worldwide Airport Coordinators Group (WWACG). The WASG is the result of airport operators, airlines and slot coordinators working together to modernize and improve the slot guidelines.
Thanks to continual update and revision, the WASG represents the globally accepted best practice and ensure that slots at capacity-constrained airports around the world are independently allocated to airlines using consistent policies, principles and processes.
Objectives of the WASG
The prime objective of airport slot coordination is to ensure the most efficient declaration, allocation and use of available airport capacity in order to optimize benefits to consumers, taking into account the interests of airports and airlines.
- To facilitate consumer choice of air services, improve global connectivity and enhance competition at congested airports for passengers and cargo.
- To provide consumers with convenient schedules that meet demand, are consistent from one season to the next, and reliable in terms of their operability.
- To ensure that slots are allocated at congested airports in an open, fair, transparent and non-discriminatory manner by a slot coordinator acting independently.
- To realize the full capacity potential of the airport infrastructure and to promote regular reviews of such capacity and demand that enable effectual capacity declarations for slot allocation on a seasonal basis.
- To balance airport access opportunities for existing and new airlines.
- To provide flexibility for the industry to respond to regulatory and changing market conditions, as well as changing consumer demand.
- To minimize congestion and delays.
Worldwide Airport Slot Guidelines - for download
WASG Edition 1 - English version (pdf) Official version
WSG Edition 10 - English version (pdf) Official version
- 12.1 Amendments to WSG Edition 10 (pdf)
- 12.2 IATA Slot Conference – Standing Working Arrangements (pdf)
- 12.3 IATA Standards for Airport Capacity Analysis (pdf)
- 12.4 Recommended Minimum System Requirements for Airlines and Coordinators (pdf)
- 12.5 Notification of Airport Level Change (xls)
- 12.6 Independence of the Coordinator (pdf)
- 12.7 Contact list for Level 2 and Level 3 Airports (xls) Last updated: 21 October 2021
- 12.8 Proposal for Revision of the WASG (pdf)
- 12.9 Best practice guidelines for the use of data analysis (pdf)
Worldwide Airport Slot Board - Best Practices
Recommended practices agreed by the WASB for adoption by all coordinators, airlines and slot coordinated airports.
- Managing temporary reductions of airport capacity (pdf) - Guidance to manage temporary reductions of airport capacity announced after the confirmation of seasonal capacity parameters. All guidance is complementary to the Worldwide Airport Slot Guidelines.