Slot Coordination
The Online Coordination System (OCS) is a powerful system that allows users to access coordinator´s databases for airports around the world. OCS provides real-time airport slot availability displays, and OCS users can view and download the latest schedule information. Authorised users can make online requests to add, change and delete slots and get immediate responses, including automatic offers and the ability to coordinate slots at multiple airports at the same time.
Visit the portal of Online Coordination at www.online-coordination.com for more information.
How to request airport slots by SCR message?
How to request airport slots by GCR message?
Calendar of coordination activities
Worldwide slot guidelines 
| ACTIVITY | NS26 SC/157 | NW26/27 SC/158 | NS27 SC/159 |
| SHL Deadline | 15-Sep-25 | 13-Apr-26 | 14-Sep-26 |
| Agreed Historics Deadline | 02-Oct-25 | 30-Apr-26 | 01-Oct-26 |
| Confirmation of final coordination parameters and details of available capacity | No later than 02-Oct-25 | No later than 30-Apr-26 | No later than 01-Oct-26 |
| Initial Submission Deadline | 09-Oct-25 | 07-May-26 | 08-Oct-26 |
| SC Event Platform Customization | 29-Oct-25 | 20-May-26 | 28-Oct-26 |
| SC Event Platform calendar opened to coordinators to request meetings with airlines | 04-Nov-25 | 26-May-26 | 03-Nov-26 |
| SAL Deadline | No later than 06-Nov-25 | No later than 28-May-26 | No later than 05-Nov-26 |
| SC Event Platform calendar opened to airlines to request meetings with coordinators | 10-Nov-25 | 01-Jun-26 | 09-Nov-26 |
| IATA Slot Conference | 18-20 Nov 25 | 09-11 Jun 26 | 17-19 Nov 26 |
| Series Return Deadline | 15-Dec-25* | 15-Jul-26* | 15-Dec-26* |
| Historics Baseline Date | 31-Jan-26 | 31-Aug-26 | 31-Jan-27 |
| Start Of Season | 29-Mar-26 | 25-Oct-26 | 28-Mar-27 |
*Trial of earlier SRD – subject to confirmation by the WASB