Do I pay more If I'm under 25? Avail Team October 29, 2019 17:58 Updated Follow No, drivers under 25 do not pay an additional underage driver fee! Related articles Can I smoke in the car? Does Avail require a security deposit? How far in advance can I make a reservation? Can I book a car for a day? Can another driver operate the vehicle during the trip? Comments 0 comments Please sign in to leave a comment.