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Calendar and Process of Coordination

The scheduling calendar is based, not on the civil year, but on two scheduling seasons, Summer and Winter, defined as follows:

  • IATA Summer Season - starts on the last Sunday of March and ends on the last Saturday of October (where the following Sunday is still in October)
  • IATA Winter Season - starts on the last Sunday of October and ends on the last Saturday of March (where the following Sunday is still in March)

For each season, predetermined steps rule the process of coordination:

  • Distribution of SHL (Slot Historical List)
  • Submission deadline for receiving SCR
  • Distribution of SAL (Slot Allocation List)
  • IATA Scheduling Conference
  • Slot Handback  Deadline
  • Handling of Ad-hoc flights
  • Start of Season
  • End of Season
WINTER 2020(W20) CALENDAR OF ACTIVITIES SUMMER 2021(S21)
20APR20 SHL Deadline 14SEP20
07MAY20 Agreed Historics Deadline 01OCT20
14MAY20 Initial Submission Deadline 08OCT20
CNL Appointments calendar opened to Coordinators 03NOV20
04JUN20 SAL Deadline 05NOV20
CNL Appointments calendar opened to Operators 09NOV20
CNL IATA Slot Conference 17-20NOV20
15AUG20 Slot Return Deadline (SRD) 15JAN21*
31AUG20 Historics Baseline Date (HBD) 31JAN21
25OCT20 Start of the season 28MAR21