Hi there, Scott!
Welcome back, and thank you for bringing another question to
planDisney about your upcoming magical theme park visit.
Park Hopper Tickets allow you to experience the magic of both parks in a single day, and I think it’s a great tool to help make the most of your time! Yes, you generally can upgrade your existing
theme park ticket to a ticket type of greater value (such as adding the Park Hopper option to a single-park ticket, pending availability) by visiting a
Disneyland Resort Main Entrance Ticket Booth in the Esplanade between Disneyland Park and Disney California Adventure Park. However, please keep in mind that without securing a Park Hopper ticket and
theme park reservation in advance, a day-of upgrade can’t always be guaranteed.
I hope this information helps and that you have a wonderful visit to the Happiest Place on Earth, Scott! Please write back with any other planning questions you may have.
Wishing you magic,
Courtney