No, you cannot ride the Hogwarts Express at Universal Orlando Resort without a "Park-to-Park" ticket (Universal’s version of a Park Hopper). This is because the train is not just a ride; it is a functional transport system that physically moves you between Universal Studios Florida (where Diagon Alley is located) and Islands of Adventure (home to Hogsmeade). When you approach the train station entrance, a Team Member will scan your ticket; if you only have a "Base" single-park ticket, you will be directed to the Guest Services window to upgrade your pass before you can enter the queue. This requirement remains strictly enforced in 2026. Riding the train in both directions is highly recommended for Harry Potter fans, as the "show" inside the train compartment is different depending on whether you are heading toward London or toward the castle, featuring unique sights and sounds from the Wizarding World.