Originally Posted by
Kiwi Flyer
Unless the airline specifically told you to check in later I'd aim to be at the airport at the normal time. Circumstances can change and you don't want to miss a flight because an expected delay turned out not to be (or to be shorter).
Since your flight is departing from EU then EU compensation rules apply - in this case for delayed flight. This doesn't change depending on when you check in.
^ Delayed flights some times get "un-delayed". I missed a JFK/SFO flight years ago because the flight was delayed so I waited until 45 minutes before the flight to go to the gate. Only to find the time had changed and the plane was backing out. It was a lesson I only needed to learn once.