Originally Posted by
Often1
Should one schedule for 90 minutes, in which case the aircraft arrives 30 minutes early half the time and 30 minutes late half the time?
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Originally Posted by
Often1
This is largely why it makes sense to leave professional commercial aircraft dispatch to licensed dispatchers and not judges of the CJEU.

These are arguments against getting angry with an airline if a flight is delayed. Clearly, sometimes you get stuck and a delay is unavoidable. But, compensation doesn't apply from the first minute of a delay - it's got to reach 180 minutes first. So with your example above, there's still a lot of leeway for the airline.
At some point, one might conclude "the airline didn't try hard enough" - and perhaps the EU decided that's after a 3 hour delay.