Hi Bianca! Thanks for bringing your question to planDisney.
So long as your ticket is valid and not expired, you can visit a helpful Cast Member at the main ticket booths near the entrance to the parks to inquire about an upgrade to
Park Hopper. They will assist you with the transaction. Currently, Park Hopper costs $65. Prices and availability are subject to change.
In addition to an
admission ticket, you also need a
theme park reservation to enter the parks. With Park Hopper, you select the park you'd like to start your day in, and later in the day, you can hop to the other park. I checked the
theme park reservation availability calendar for you, and at this time, there is only one starting park available for your preferred date. Please be aware that availability can change quickly.
Park Hopper is a great option which gives Guests a lot of flexibility for their park day. We always choose it, so we can dine where we like and enjoy the Attractions in both parks. I hope you're able to upgrade on your final day and enjoy what both parks have to offer!
Check out the
Lunar New Year celebration in Disney California Adventure Park if you haven't already. Disneyland Resort is celebrating the Year of the Dragon with special menu items, entertainment, and fun activities you won't want to miss.
Have a magical day.
Elizabeth