Adelaide International Airport is very small (one aerobridge only; but that's going to change very soon). There's not much to do at this airport. The one advantage of this airport is that it is just 5 minutes from the CBD. So usually I go to the airport just one hour before departure. Check-in can be quite long if you arrived 2 hours before departure. The airport is clean (due to the size). Adelaide Domestic Airport is pretty average. The airport is actually quite dirty probably due to the influx of people in the airport every hour. There isn't enough seats though. Check-in is quick. The only disadvantage is that the international and domestic terminals are far apart. It takes a short ride to either terminals though. Can't wait for the new merged terminal.