Hi Laura,
Welcome to the Disney Parks Moms Panel! I'm so glad you stopped by with your question.
I'm so incredibly sorry to inform you that Disney closed down Express Transportation between parks in August 2017.
For speedy transit between parks, feel free to take advantage of
Minnie Van service, available through the Lyft app while at the Walt Disney World Resort. You will still have to go through security at each park when using this service.
There is also complimentary
Bus Service,
Monorail transportation and, opening on September 29, 2019,
Skyliner gondola service available in select locations.
Laura, I hope transit between parks is easy for you to navigate on your upcoming trip! Come see us again with any additional questions!
Best Wishes,
Amy S.