Buses: There are two very reasonably priced public bus options: ACTV local buses (www.actv.it), or ATVO direct coaches (www.atvo.it).
Both take you to Piazzale Roma, the end of the road in historic Venice
and entrance to the Grand Canal. (For buses to Mestre, see below under
Land Route to the Mainland.)
The ACTV n°5 bus runs every quarter hour
most of the day, and takes 22-25 minutes to reach Piazzale Roma (or
vice versa) with limited stops along the route. It is an easily
accessible, low rise bus adapted to travel with baggage, including
internal luggage racks and one low step to enter, almost at curb level.
If purchased together with a Tourist travel card, the ticket costs an
additional €4.00 one way, or €8.00 round trip/return; otherwise if
purchased separately, it costs €6.00 one way or €11.00 round
trip/return. It is also possible to purchase a one way Bus+Vaporetto
ticket for the bus to Piazzale Roma and a one way vaporetto trip within a
total of 90 minutes at a cost of €12.00.

The ATVO coach is a typical "Greyhound" style coach, with ample
luggage storage out of sight under the raised passenger seating area,
which requires four relatively high, steep steps up to the passenger
compartment. It runs once every half hour most of the day, takes 20 minutes non-stop to Piazzale Roma, and is €6.00 one way or €11.00 round trip/return.

ATVO 的巴士最好，机场直达罗马广场，只要 20 分钟左右，去年 6 欧一人，不知道现在有没有涨价。

打的！          太贵了。机场大巴就好了。记得点有用