The bridge is open every day of the year:
Sep 1 - Nov 1: 9 am - 7 pm
Nov 2 - Feb 29: 9:30 am - 5:45 pm
Mar: 9 am - 6:30 pm
Apr - Jun: 9 am - 7 pm
Jul: 9 am - 8 pm
Aug: 9 am - 8:30 pm
Adults: €4.50
Seniors (60+), students, children (8 - 17): €3.50
Wikipedia https://en.wikipedia.org/wiki/Pont_Saint-B%25C3%25A9n%25C3%25A9zet
Official website http://www.avignon-pont.com/en
Phone +33 4 32 74 32 74
Address Boulevard de la Ligne, 84000 Avignon, France
Coordinates 43°57'13.299" N 4°48'18.09" E