The marine park is south of Orlando and Universal, north of Disney. From I-4, take exit 72, Beachline (previously Bee Line) Expressway/Highway 528, and follow the signs.
Parking -- Parking costs $12 for cars, light trucks, and vans; it's $20 for preferred parking closer to the park entrance. The lots aren't huge, and most folks can walk to the entrance; trams also run. Note the location of your car -- SeaWorld characters such as Wally Walrus mark sections, but at the end of a long day it's easy to forget where you parked.
SeaWorld and Busch Gardens in Tampa, both owned by Blackstone, have a shuttle service that offers $10 round-trip tickets to get you from Orlando to Tampa and back. The 1 1/2- to 2-hour each-way shuttle runs daily and has five pickup locations in Orlando, including at Universal and on I-Drive (tel. 800/221-1339). The schedule allows about 7 hours at Busch Gardens. The service is free if you have a FlexTicket.
Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.