If I buy online an Ordinaria fare for a regional train, going from Venice S.Lucia to Venice Mestre for say, departing 11:05 am, can I use this ticket on an earlier train from Venice S.L to Venice Mestre, if I arrive at Venice S.L earlier? My understanding is you can use the online ticket for within 4 hours of ticket departure time, but does that mean 4 hours after or also 4 hours before the purchased time?
I realize I can also buy hard paper ticket, but I am not sure where the nearest ticket place is, as we will be coming in by plane, and also I don't want to be rushed to get the ticket that same morning at the S,L train station. I am told where we are staying is around 45 minutes away from the train station and checkout is 1000.
Thank you very much for your help.