Hello,
I'll be flying into VCE on a Saturday morning, leaving the same evening. So I want to buy a 24 hour ticket including the bus transfer from VCE into Venice. I understand it costs €33. OK.

Can I buy it at a vending machine in the VCE airport using a credit card?I see that I can buy he ticket online, but I think that only gives me a code to exchange for the real ticket at a vending machine or office. Is that correct? Then what would be the point of buying it online rather than in person?

TNX