There are many ways to get from Venice's Marco Polo Airport to the city of Venice.
ATVO Fly Bus - The Fly bus will take you to Venice (Piazzale Roma) and other Veneto destinations. A bus is also available to Mestre. Check below for an ACTV Travelcard
City Bus number 5 takes you to Venice, number 15 to Mestre. An inexpensive option, but you probably don't want to use it when you have a lot of luggage. Like most local buses in Italy, buy a ticket at a tabacchi (tobacco store) or newsstand. There is one at the airport.
Shared Airport Transfer Services
Alilaguna offers many connections via boat between Venice and the Airport. (map of route).
Shared transfer on a water taxi for a minimum of two people is possible at a reasonable cost from Venicelink. It will take you right to your hotel (and everyone else's hotel).
If you prefer to have your transfer services managed by an American company in a manner advertised as "faster than the Public Airport Boat" (you'll want all the time you can get--it's Venice!), you can order the highly rated Venice Airport Shuttle services from Select Italy (book direct).
Discount Transportation and Services Cards - The Venezia Unica City Pass and ACTV Travelcard
A Venezia Unica City Pass offers a card tailored to your expected uses of public transportation, churches, museums, wifi access, public toilets and car parking based on the season of your visit. You can find out all about the Venice pass here. The composer allows you to add services on a ala carte basis, so you can have 7 days of free toilet and three days of WiFi, for example.
ACTV offers Travelcards good for up to seven days. They allow unlimited travel and can be used on all the services - both waterborne (except those of route Alilaguna, Clodia, Fusina) and on land - that provide urban services within the municipality ("Comune") of Venice (land services on the Lido and in Mestre). This is the pass to buy if you're only interested in a transportation only pass.
Rental Cars available at Marco Polo Airport (arrivals lounge):
- AutoServizi Maggiore
- Autotravel - Sixt
- Easy Car
- Europcar Italia
- Italy by car
- Qui Car
- So.Ge.A. - Tirreno Prestige
- Targa Rent
There is a map of the airport Road Network here.