How does one order tickets on line for the outdoor theatre in September?
Assuming you mean the Herod Atticus, start at http://www.athensinfoguide.com/hellenicfestival.htm If you are going to the Herod Atticus, go for seats at the very top/back. It is shaped like a "D". Seats at the top of the "D" (IMHO) are the best, at night, as you get a great view of the city as well. Roger