you should take an ATVO bus (the Venice Airport Bus Express) or Alilaguna water bus. If you – like many other travelers – choose to take the train from other Italian or European cities ...
The vaporetto water bus is 10 euro per ride, a gondola is 80-100 euro per 30 minutes, and getting from the airport into Venice can range from a few euro to a few hundred euro. (More on that next).