Well if you can don’t come by car: As venice is build on the lagoon there is no space for cars. You will have to leave your car in a car park costing 20-30 Euro per day. If you leave your car in Mestre for example will cost much less. You can even park for free in Mestre and take the bus, tram, train or taxi to Venice. (one way bus ride cost Euro 1.5)
If you need an overnight stay a good choice can be Best Western Titian Inn Hotel Venice Airport this is 600 mt from airport they currently offer free parking. You can reach Venice by public transport. In case you need to return your car rental at airport is possibly the best solution.
Another good option with free parking and near the airport can be a farm stay at Agriturismo Il Melograno
If you plan to use a car while visiting Venice may be more cost effective hiring one. See our page Car
For detailed information about parking outide Venice visit here