Hi,
I have 4 hour connection in VCE (maybe more if arrive early). Is it worth going to the city? If yes, what should I use to get there and what would be recommended place to go to. If not, any advice on how to kill the time?
Thank you in advance.

the airport is out in no where.i would suggest you take a boat to the city, and then return directly. the trip by water takes about half an hour by water taxi, and about an hour by watersBus. i have never taken a land taxi, so do not know.

Thank you for the details.
Taking a taxi would cost too much, and water bus (alilaguna) would take more than an hour one way in addition it runs every 30 minutes to an hour (to saint marks square). If my flight arrives earlier (at least 30 minutes) then I will need ~1.5 hours just to get to the city and back.And I need to get back to the airport at least one hour before departure all I have left is one hour.
Has anyone here done that?

You can't do it without a water taxi, and it's not worth it.

Thank you Perche. What is the minimum time needed comfortably getting to the city and back to the airport (not using a taxi).

If you were going just on a boat ride taking the orange line is best. It stops one stop short of San Marco but you get a ride up the Grand Canal. Much more scenic than the blue line to SM. only problem is, some Alilaguna boats have outside sitting. Others, you're cramped downstairs. No way of predicting. You might not see anything. If you did the Orange line and bought a round trip ticket and never got off the boat, it's about 2.5 hours. The blue line to SM takes 3 hours round trip if you don't get off the boat. The boats run every half hour, so if you even step off the boat for more than the 5 minute turn around time, adjust the times to 3 and 3.5 hours.

If your plane lands on time it may take 10 minutes or more to deplane, 15 minutes or more to get through passport control, it's a 10-15 minute walk from passport control to the boat, and the boats only run every half hour, so you may have to wait up to 30 minutes to get on the boat.

On the way back if you have elite status or first class it can take 5-10 minutes to get your ticket and 10-15 minutes to get through security. If you don't have status, check in time could easily exceed one hour. Then you have to go to a bus departure terminal and board a bus to the plane. before you get to the gate for the bus they will check your passport again.

I applaud the intensity of your desire to see Venice. I won't judge your motives. Perhaps there's an emotional connection from someone you loved, I don't know. It's the most amazing, beautiful city, as long as you don't stay near San Marco or any central part between late April and mid-November. Given your desire, I'm sure you'll see it properly in the future.

But you can't do it on a 4 hour layover without it being more likely than not that you will miss your flight, and even if you don't, the stress wouldn't have been worth it. Don't worry. Venice will be there in the future.

Italy, and especially La Serenissima Venice, is to be savored. Venice is not a quickie. What is, " the minimum time needed for comfortably getting to the city and back to the airport?" Really, it's 3-7 days, and I'm not trying to be facetious.

Thank you for the very detailed post. In my case, I am just connecting in Venice with a 4 hour layover and trying to figure out how to spend those 4 or more (if arrival is early) hours. I don't have to checking again as I will check-in on my first leg (connecting from UA to TP). I think anything should be better than sitting at the airport (assuming not too expensive). That's why was exploring my options. At the same time you are 100% right, even full day wouldn't be enough to explore the city.
Based on the travel times you provided I think I need at least 5 full hours even to think abt taking orange line, another option was looking at, taking a bus from the airport to Grand Canal and then boarding a boat (let's say Alilaguna to the airport) but in this scenario I am dependent on a bus and a boat which might complicate things even more but it looks like more doable.

Slightly better chance on a bus, but still not easy to do. 20 minutes plus traffic time each way from airport to Piazzale Romas. Cross the street to the vaporetto stop at Piazzale Roma and wait up to 15 minutes for the #1 vaporetto, take up the Grand Canal get off at San Marco, wait up to 15 minutes for the vaporetto to go back to Piazzale Roma. It's 40 minutes each way. It's 40 minutes each way, plus the time spent waiting for the vaporetti. Then wait 10 minutes for the bus to the airport, 20 minutes plus traffic. That's two hours, plus the waiting time for buses and boats, which can take you to two and a half hours. Then add in the other factors I mentioned above. Even if you don't have to check in, you still have to go through passport control on the way out, and unless you have priority, you can be waiting for an hour to get through security on the way back.

It's a nice airport for shopping, and there's a surprisingly good Italian restaurant with a counter airside. Then you can buy a day pass to one of the lounges, and relax. You have enough information now. What you do with it is up to you.

I haven't done this so I have no idea - but can OP get on the Alilaguna and basically do a cheap roundtrip cruise around the island and back to the airport without getting off? If nothing else, it's better than staring at the walls in the terminal. Venice is beautiful from a distance even if you don't get to land and walk.

That's one of the itineraries I gave, "If you did the Orange line and bought a round trip ticket and never got off the boat, it's about 2.5 hours. The blue line to SM takes 3 hours round trip if you don't get off the boat." It's go to one place, stay on the boat, the boats turns around and does the same route going back. It doesn't keep going straight around. And that requires 2.5-3.0 hours on the boat, not including clearing passport to exit, walking to the boat, waiting for the boat, and going through security on the way back. Since a bus takes you to the plane, you really have to be at the gate 30 minutes before. There are usually two buses, one to pick up a few late people, but a four hour layover means he has 3.5 hours to deplane good to Venice, get back to the gate n

I think it would be theoretically doable if you took the bus into Venice and a land taxi back to the airport. Four hours seems like too little, but 4:30 or closer to 5:00, and I might give it a try. If you're quickly through immigration and hit the ATVO bus just right, you could be in Venice within an hour. If immigration lines are long, and you just miss the ATVO bus and it's a time of day where they only run every 40 minutes, you maybe just turn around and head back into the airport. At least you gave it a go. But if your plane is a little early, you might play it by ear -- see how long immigration takes and then hightail it over to the ATVO and see if your timing is good. If it isn't, it was worth a try.

Assuming that part goes smoothly, you could spend an hour and a half or so in Venice -- you could walk along the Grand Canal in front of the train station and maybe cross over the Scalzi bridge or even maybe walk to the Rialto bridge and back. If you're back at the Piazzale Roma 1:30 before your flight, you should be ok. Emphasis, of course, on "should." A traffic jam and you're in trouble. So, depends on whether a subsequent flight is a possibility and how risk averse you are.

Bus over and cab back should be about 50 to 60 euros. If your timing is perfect again, you could even take the bus back instead of a taxi. Again, if you assume a taxi for the worst case, and manage to hit the ATVO perfectly, you could do it as cheaply as 15 to 20 euros. (I think the ATVO is in the 8 euro range.)

I only agree that a taxi could shave off the 25-30 minute bus ride by maybe 10 minutes, if no traffic. I wouldn't recommend OP to try to walk to the Ponte degli Scalzi. The bus leaves you off at Piazzale Roma, the only place in Venice with cars, traffic, noise. Ponte degli scalzi is right there. He'd go all the way to Venice to walk 500 yards, cross the bridge in the same ugly neighborhood, and come back and take the cab. There's no point in that.

Trying to walk to the Rialto Bridge and back means surely missing the plane. You cannot walk very far in Venice without getting hopelessly lost unless you were born there, no matter how many signs there are. There is no fondamenta or sidewalk along the Grand Canal except at a few short spots. OP can't just walk along the canal until he gets to Ponte Rialto. He has to head into the labyrinth of narrow, curvy streets and will have to know how to make at least 20-30 turns into and out of various narrow streets side streets that don't even have street signs for the most part. The chances of getting lost on the way to Ponte Rialto and back are close to 100%. Even if you know your way and don't get lost it's 20-25 minute walk each way. GPS won't help because the streets are too narrow. Trying to walk from Piazzale Roma to Rialto, the chance is about 100% that the OP will get hopeless lost and miss the plane.

If I were going to throw caution to the wind, I'd take the Alilaguna blue line and get off at Murano, the first stop, 30 minutes away. Murano is the island famous for glass blowing. It's part of Venice, with canals, the same food, tilting buildings, etc. There is no risk of traffic, and the boats are punctual. For example, if he took the 11:00 AM alilaguna blue from the airport to Murano Colonna he would arrive at 11:30. He could walk around for 40 minutes and take the 12:10 back, and be at the airport at 12:40. A hour and 40 minutes round trip. If passport, and looking at the security lines when he arrives seems reasonable, then this is the safest approach. Murano is very nice, and many visitors to Venice schedule a day trip there.