German phrase
Wie lange vor Abflug sollte ich ~ sein?
Meaning
How long before departure should I be ___?
When to use it
Asks the needed lead time. This is measured before departure for check-in or similar procedures.
Example dialogue
Wie lange vor Abflug sollte ich eingecheckt sein?
How long before departure should I be checked in?
Mindestens 45 Minuten vorher.
At least 45 minutes before departure.