Greetings Claire,
I hope you're having a fantastic day.
How exciting to know you'll be in California, especially if you're considering a visit to the
Disneyland Resort for a total of three days!
When you purchase a theme park ticket, you have the option of upgrading to a Park Hopper, as long as your ticket is valid and it has remaining admissions.
In other words, if you purchased three one-day tickets but only two of those have the Park Hopper option, you can certainly upgrade the third ticket when you arrive at the Disneyland Resort to include the Park Hopper on that one as well.
As a reminder, tickets can be upgraded within 14 days of their first use. Ticket upgrades must be made in person at the Main Entrance Ticket Booths, Theme Park
Guest Relations locations or at the Front Desk at Disneyland Resort Hotels.
Lastly, don't forget to buy a
Disney PhotoPass to capture all your magical memories!
Have fun Claire!
-Anabel M.