We have added the option to "Expire" a flight from showing up on the Agency portal, Website, API, GDS and other channels X minutes before the flight departure.
Once you set for example 60 minutes, the flight will not be bookable 60 minutes before departure.
NOTE- It will still be bookable for users of the airline and/or users with "Past booking permission".
In order to activate it, you can do it in both ways:
Update the entire flight series using the action pane:
Update the single flight, in the "Edit" button: