Hi Alesha, welcome to planDisney!
Always a GREAT IDEA to extend your magical Disney vacation!
You can absolutely upgrade your tickets from a one-day park hopper to a two-day park hopper. You would need to either visit the
Disneyland Resort Main Entrance Ticket Booths or call the
Disneyland Resort Ticket Line at 714-781-4636 and have one of the amazing Cast Members help you!
And speaking of upgrades, have you by chance considered adding the
Disney Genie+ Service add-on to your tickets? Genie+ allows you to access the
Lightning Lane entrances instead of having to wait in the standby lines, and the time savings my family generally sees from this is huge! Also as a great bonus, you get unlimited
Disney PhotoPass Digital Downloads with the purchase of Genie+!
If you have any other questions, please visit us again!
See ya real soon!
Jin