USA Bus Lines - How early should I arrive at the Greyhound Bus Depot before departure time?

How early should I arrive at the Greyhound Bus Depot before departure time?

30 minutes early, because a delay could occur.
it depends what city you are in as in some cities some stations are closed at certain time of the day or even on weekends which means you not able to get your ticket and the greyhound driver will not let you board unless you have a ticket as the driver can not take cash it also depends where you are going it depends on the route the earlier the better
I always got to the station an hour ahead of time because I wanted to make sure I'd get a seat (the route I traveled on was popular).