For a short-haul flight where you are only taking hand luggage, checking in online saves a lot of time and is therefore much better than checking in at the airport. If, on the other hand, you have to check in bulky luggage, it is better to use the classic check-in at the airport for security reasons.
Is it better to check in online early or late for flight?
Q: What happens if I check in late? A: If you check in late, there is a chance that the gate may already be closed and you might not be allowed to board the flight. It is always better to check in as early as possible to avoid any last-minute issues.