I ordered electric zoo tickets online on thursday and still haven't gotten them yet.|||That all depends on where the letter is mailed from.
Generally, Mail sent from your own city..should come the next day * if it was sent out at least before 2pm.
Mail in your state - 1-2 days
Neighboring states 2-3 days
Other regions can take anywhere from 2-5 days.
With something like tickets, they probably have a processing time, but even with that, if theyre in the same city.. I would be questioning them, if they didnt come by Wed's mail.