When you are purchasing Universal Orlando, you may want to consider a multi-day ticket. Multi-Day tickets will increase your savings.
Ticket Types: There are 3 types of ticket types available and they are:
Base Ticket: This ticket will allow you into one of theme parks* per day, for the number of days you purchase. So, a 3 day Base Ticket will allow you into either Universal Studios, Islands of Adventure OR Volcano Bay. You can not utilize the Park -to- Park feature as it is not available with this ticket.
Park -to- Park Tickets: These can be purchased as either 2 Park (Universal Studios / Islands of Adventure) or 3 Park (which also includes Volcano Bay) Passes. So, if you purchase 3 Day 2 Park -to- Park Passes, you can come and go at Universal Studios as often as you like for 3 days of your stay. If you purchase 3 Day 3 Park-to-Park Passes, you can visit Universal Studios, Islands of Adventure and Volcano Bay, as often as you like for 3 days. This ticket is required to ride the Hogwarts Express.
Days Purchased: You can purchase the above tickets for as many days as you like, however, we highly recommend if you are staying longer than 4 days, that you take a look at Universal's Annual Pass Options. Around the 4 Day mark, the Annual Passes might actually wind up saving you money (as well as give you a reason to book another trip within the next year.)