I would like to know if I would be able to make a plane
flight leaving at 7:45 am from Venice. The hotel is one you recommended by St. Marks
Sure, just a question of how early you have to get up. Ask hotel for recommendations on fastest way to airport.
Lots of ways to get there on time. The airport terminals don't even open till 6:30 or so. The #5 bus out of Piazza Roma will get you there on time. Or use the new private ferry if you are leaving from St. Marks. Both are low cost. As Frank said, just ask the hotel.
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Firstly - do you realize that the group here are volunteers - Rick is not here? Also, you can get anywhere if you get out of be early enough. Is 7:45 something you are comfortable with?