You can generally book a one-way rental between locations in the same city at no extra charge. One-way rentals between SIXT stations in France are possible, but an extra fee will be charged.
You’ll need a valid driver’s license plus an ID or passport for a SIXT rental. Renters with a license using a non-Roman alphabet like Arabic will also need an international driving permit.
You’ll need to be 18 or older and have held a driver’s license for at least 2 years for a SIXT rental in France. Some car categories have different driver’s license requirements, and an underage driver fee applies to those under 25.