If you aren' t driving to Orlando but want a car while you're here, you can rent one from any major rental firm.
Rental cars are readily available near the airport.
The bottom two levels of OIA's main terminal garages are now dedicated to the rental car agencies. For cars from other companies, you will need to take a shuttle bus to a facility that, in some cases, is 15 minutes away. Here's a list of area rental agencies. Open 24 hours. Located a 10-minute shuttle ride from Orlando International Airport.