My Jolla 1 drops from 100% to 90% by the time I get to work. That is about 45 minutes by car on a good day, with the phone in the pocket. But of course that is with all radio on and checking for emails every 30 minutes. Over 3/4G.

A 10% drop overnight is absolutely normal, again with all radio on. In an aeroplane mode I would expect it to drain a bit less, but I suppose it depends on what you have running. I have heard that Android support drains the battery. I wouldn't know, I don't have it installed.