Hey there, Melissa! Welcome to planDisney, we are so happy you stopped by!
Upgrading your unused theme park ticket to Disneyland Resort should be as easy as Cinderella trying on her glass slipper! As long as your tickets are
unused and not expired, you can definitely upgrade to a
Magic Key Pass. All you have to do is log in to your Disneyland Mobile app, and click on the "Tickets and Passes" icon. You will then be redirected to a screen that shows you your theme park ticket. Click on "Upgrade to a Magic Key Pass" and voila (as my friend, Lumiere, says!) you will be redirected to a screen to finish the final steps.
Keep in mind not all pass types may be available at any time, and you will still need to make theme park reservations when you plan on visiting!
Have the most magical visit to the Happiest Place on Earth, Melissa!
Frances