Sixt takes 10% off car rentals in Phoenix with prices starting at $17.85 per day, as provided by ShermansTravel. (We found this rate on December 1 with pickup from Phoenix Sky Harbor International Airport and drop off at Tampa International Airport.) That's the lowest daily rate we could find by $4. It's valid at participating locations in Phoenix only. Fees, insurance, and taxes are additional. This travel deal ends November 26 for rentals through December 31.