One-way rentals between SIXT stations are generally allowed. An additional fee may apply.
If your plans are up in the air, don’t worry. Choose to pay on arrival when booking and cancel your reservation for free if something changes.
The minimum age to rent a car with SIXT in the U.S. is 21 with a valid driver’s license. You must be 25 to rent some specialty and larger vehicles. An underage fee applies.