On: Lufthansa confirmed that 18k flights had been flow...

[casion]

Could someone explain this concept of "slots" in the context of airlines? I read the article and it's not much clearer to me.

[vulcan01 → casion]

https://en.wikipedia.org/wiki/Landing_slot

Essentially, a permit granted by an airport to an airline to schedule a takeoff or landing at a particular time / around that time.