Heading Saint Tropez form the Nice Airport is not a really long distance but during the high season, do not be surprised to spend 3 hours plus on the way.
It takes only 1 hour from Nice airport to the city of St Maxime.
From this point, this where the traffic is getting crazy in summer.
the driver as the possibility to change its journey and get through “le Plan de la Tour”, which sometimes, may shorten your ride for 30minutes.
Nice airport / St Tropez: 105Km (65mi).