The other day we bought tickets on Delta from "da Burgh" -JFK-Paris-Vienna. We have a 1 hour 35 minute layover at CDG to make the connection with Air France to Vienna. After extensive travel in Europe this is the first time to make a connection onto our primary destination. My question is: where do we clear passport/customs? In Paris upon arrival or in Vienna? Or both?
Buon viaggio and thanks in advance.