To get the discount on the entry ticket, present a boarding pass from an Alitalia flight to/from Rome at the ticket office for the Fora or at Tourist Information Points. The boarding pass must be dated within ten days of the date of the visit. Tickets can be bought on the day of the show, subject to availability, at the Forum of Augustus and Imperial Fora ticket office on Via Alessandrina, on the Largo Corrado Ricci side, at the Forum of Caesar and Forum of Trajan ticket office near the Trajan Column, or at Tourist Information Points.
Tickets can also be bought for other dates, but a EUR 1 booking fee will be applied for a single ticket and a EUR 2 fee for a combined ticket.
For more information: http://www.viaggioneifori.it/