The best time to travel to Aix-en-Provence comes down to personal preference. If you’re vacationing on a budget, perhaps avoid June, which is considered to be the most expensive month. December is usually when you’ll score the best prices. To enjoy the energy of peak season, pack your bags for August, July, June. January, February, November are the least popular months to visit and a good idea if you want to get away from the crowds.