Hi Barb!
Thank you for bringing your question to the Disney Parks Moms Panel!
The actual bus ride would be no more than 15 - 20 minutes. I like to plan on at least an hour travel time, though, in case of a long wait for the bus or a traffic incident that slows us down.
However, you may want to check when you arrive about your bus time. Generally, the bus service from theme parks to
Disney Springs begins after 4:00 p.m. You can read more about that on
this article from the Disney Parks Blog. I would ask a cast member to see if buses will be running when you need them. Other options are taxis, Uber, or taking a bus to a resort and then from there to Disney Springs.
I hope this helps! Please let me know if you have any other questions.