How much time should I allow before my flight leaves/after it arrives?

To the airport: 

• You should allow enough time so as not to risk the check-in desk being closed when you arrive. We recommend 30 minutes for flights within the Schengen area and up to 60 minutes for flights outside the Schengen area. 

• It’s your responsibility to count an arrival of three hours before your flight leaves. 

From the airport: 

• It all depends on the airport. Regardless, allow at least half an hour to get to the shuttle. 

• Take into account the time it takes to collect your luggage and clear customs.