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Worldwide Airport Slots

The Slot Allocation Process


Airport Slots             The lack of capacity in the airport system to cope with increasing demand is a major concern. There are over 165 airports formally designated as Level 3 (most congested, requiring slots), and this number is expected to grow significantly over the next five years.

IATA’s Worldwide Slot Guidelines (WSG) is the accepted global standard for the policies, principles, and procedures of airport slot management.

IATA continues to promote the WSG at every opportunity. It has successfully argued against the European Commission, for example, which was proposing a change from the 80-20 “use it or lose it” slot rule to an 85-15 rule.

And, together with industry partners, it is working closely with the Indian, Colombian, and Brazilian governments to promote WSG policies and principles. The Chinese slot management system also needs to be aligned with the WSG, and a number of constructive meetings have been held.  

The Slot Conference 

The semi-annual Slot Conference - SC allows airlines and coordinators to meet face-to-face to review their slot portfolio and finalize their future schedules.


Worldwide Airport Slots is involved with various committees and workgroups that meet on a regular basis to improve slot allocation policy and procedures. 

Visit our FAQ section for more information.

Position Paper

Managing Scarce Airport Capacity (pdf)


Additional information

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