There is no set time. A lot depends if any scooters get on or off or even the amount of people getting in or off. I would expect it to take on average about 20 or so minutes till it leaves the Springs stop from when it leaves the Grandstand. The arrival time in the app for the buses are good but not always correct, it’s better than not having anything at all, we have had it go both ways, bus shows up couple minutes early or later. If you getting on a bus at non peak times the trip around the resort will be shorter. We usually try to get on a bus at least one hour before we have to be somewhere. Most of the time we make it there, a few times we were a little late. Lines at the park entrances are usually good, but sometimes you get in a slow one and it takes forever it seems.