How late can you be with a basic pass?

You can honestly show up later than 20 minutes. We were about 30 minutes late after dealing with parking and getting in and they didn't even care or say anything about it.

You have 20 minutes from the time listed on your timed entry ticket.

It is the time you schedule but I do believe they are flexible.

I believe it's the time you schedule unless you get the flex package which gives you 2hr +/-