Hotwire offers roundtrip 3-day car rentals from Orlando International Airport (MCO) for as low as $8 per day. (We found this rate from September 18 through September 21.) That's the best per-day rate we could find by $16. A 3-day minimum purchase is required for these rates. Fees, insurance, and taxes are additional. Book this travel deal by September 30 for rentals through the same period.