I assume you mean you will be arriving at the airport at 1:30 P. If you booked your flight with Grand Circle, someone will meet you at the airport. Depending on how many other travelers are arriving at about this time, the promptness of the flights & collection of luggage, you may arrive at the ship by 3:00P give or take a little. When we did this trip in 2009, Grand Circle provided a free shuttle to downtown during the afternoon - the 1st left at 2:30 & the last left Vienna @ 5:30. If people wanted to stay in Vienna longer, they could take a taxi back to the ship, as it didn't start cruising until after midnight. From the shuttle dropoff point you could take the subway to Schonbrunn - its the Schonbrunn stop on the green line, about a 20 minute ride. You could see the gardens and the outside of the palace. I don't know if you would have time to see the interior-depends on the length of the lines. All in all, it would be a rush. My suggestion is to take the shuttle to downtown and walk around. The city center is compact and has many beautiful buildings, churches, monuments & parks - ie St Stephen's cathedral, the Hofburg Palace complex, the State Opera House, Parliament, Burg Theater. Most of the churches are open during the afternoon and are stunning. You might also have a coffee & pastry at an outdoor cafe. I think this might be more enjoyable after an overnight flight, than rushing out to Schonbrunn & being disappointed if you didn't have time to take the tour. Whatever you do, have a a good time. The Great Rivers of Europe is a fantastic tour. We loved it and would like to do it again.