Unfortunately, it may not be feasible or practical to plan a day trip from Udaipur to Goa due to the distance between the two cities. The quickest way to travel between them would be by air which takes approximately 2 hours one way. Alternatively, if you prefer traveling by train or road transport it could take significantly longer depending on traffic conditions and availability of direct connections. It is recommended that visitors allocate a minimum of 2-3 days to fully enjoy and explore Goa's attractions, including its casinos.