Average of about 70 mins. Most of the time Pop is the first stop, so you will have a shorter time. But...the one time it took me close to 90 mins to get to a resort was when I was going to Pop and it was the last of three stops..and at each of the first two stops we spent longer than normal at each stop due to a lot of luggage that had to be off-loaded.
If you arrive, ontime, at 1pm, you should be checking into Pop by 2:30...at the latest.