As posted in the Discord channel, some US airports with nighttime restrictions in the game do not have an official curfew in place. Here are some night time flights (0000-0600) from/to MSN, ATW, GRB, PSC, PSP, MKE, and I also made notes where there are noise-related programs in place. Posting here to collect opinions on removing curfew on these kind of airport (or not).
By Bjorn (on Discord):
Some airports with “bans” are really more voluntary or “voluntary” (as in, we’re politically connected and will play games with your airline if you don’t go along). For gameplay purposes, I’m fine with the latter being treated as a formal nighttime ban.