Denise, At that time of year, you can expect 3 hours from Provence (St. Remy) to Cannes. Nice is a bit further. We took the scenic route and got caught up in terrible traffic. My advice is to go via highway the entire way to Nice. Nice has more to offer than Cannes in the way of museums and tourist sites. Another recommendation is to take the train from Avignon or Arles and go directly to Nice. You can rent a car at the train station. This is the fastest way.
