It’s also possible to take the public bus from airport to Venezia Piazzale Roma (Line 5) and the Waters bus to St Mark’s Square.
See the video from my Alilaguna Waters Bus trip.
Follow my 1.5 hour water bus trip from Venice Marco Polo airport to San Marco Square, Venice. (can also be used to/from the cruise terminal) with Alilaguna, Linea Blu (Blue line).
Alilaguna was founded in Venice in 1999 thanks to the business venture of a group of tourist operators who started with the first public transportation service connecting Marco Polo airport to the city centre.
First it was the Linea Rossa which connected Marco Polo airport to Murano, the Lido of Venice and San Marco square.
Right the year after Linea Rossa was extended up to Zattere and was added also the Linea Blu, connecting Marco Polo airport to Fondamente Nuove, Santa Giustina and San Marco square and the cruise terminal.
Boat trip from Cruise port to Marco Polo Airport: