4. Universal Offers Both Park to Park and Base Tickets
While base tickets may be more economical, the park to park tickets at Universal are “worth it” in my opinion. First, you are not losing a lot of travel time between Universal Studios Florida and Islands of Adventure. You can literally walk out of one and into the ticket gates of the other.
This ease between parks makes it so easy, and time efficient to visit both parks in one day. Secondly, to ride the Hogwarts Express, you need a park to park ticket. You cannot board the Hogwarts Express without it.