To avoid unnecessary stress, you should come to the airport at least 2 hours before the scheduled departure. If you have a boarding pass, it is enough to pass the security check and go to the appropriate gate. When traveling to countries outside the Schengen area, it is also required to pass through passport control. Sometimes a passenger is forced to wait in a long line to check in, then to security checks and then to passport control. Remember that on the way to the airport there may be situations beyond your control. Have enough time;)