Hey there Nora, it's great to have you back at planDisney!
It sounds like you're gearing up for a great Walt Disney World Resort adventure this summer and with more theme park options to choose from compared to
your previous visit to Disneyland Resort, having
Park Hopper Option can really be a game-changer!
Now you'll be happy to hear that I was able to confirm with a Guest Relations Cast Member that in most cases, they're often able to assist guests in upgrading their existing theme park admission to include the Park Hopper option - including tickets purchased from third-party retailers. They did however also let me know that there is no guarantee however, that this will be the case for all ticket sources which makes it very important to read any terms and conditions that may include limitations. (For example, these partnerships with companies providing discounted tickets to their employees may also be subject to change without prior notice so since we at planDisney can't have access to look into the kinds of tickets you might have, your best bet from home is to contact the
Walt Disney World Resort team directly over the phone.)
When you're here in Orlando, I found that it might save you some time on your theme park days to get this sorted out at the
Disney Ticket Center at Disney Springs the day before in the event of any lines outside of the park entrances at either the ticket windows or Guest Relations. Here's hoping that the Cast Members will be able to assist you with the upgrade to have you well on your way to hop between the theme parks in no time!
Wishing you some happy hopping!
Prince