Originally Posted by
Often1
Always best to resolve issues prior to the airport. Three hours prior to departure is far too long in advance for something that takes 30 seconds to fix and far too short for something that takes hours or cannot be fixed at the airport.
Just because it "usually" is one thing does not mean that it is.
Although if you are staying overnight at the airport you can go in as soon as they open and then return to your hotel. Anyway, it is still better that it was dealt with beforehand.