Yes, you can almost always upgrade a standard "Base" Disney ticket to a Park Hopper ticket. At Walt Disney World or Disneyland, you can perform this upgrade via the "My Disney Experience" or "Disneyland" mobile apps, or by visiting a guest relations window or ticket booth at the park entrance. You will be required to pay the price difference between the base ticket and the Park Hopper option for the entire duration of the ticket. For example, if you have a 4-day ticket and decide to upgrade on Day 2, you still have to pay the Park Hopper fee for all 4 days; Disney does not pro-rate the upgrade for only the remaining days. In 2026, Park Hopping begins at 11:00 AM daily (subject to capacity), allowing you to visit as many parks as you like after your first entry. If you have an Annual Pass, Park Hopper benefits are typically already included in most tiers. It is a very flexible process, but it is most cost-effective to decide early in your trip to get the most "hopping" value for the flat-rate upgrade fee.