We had a close call in San Juan as our flt was delayed in Miami....we got on with 20 mins to spare and they still wanted to take our Photo's lol. Mine you there were no line ups lol. What helped us was we travelled with carry on bags ONLY...god if we had to wait for the bags I don't think we would have made it. So do carry on only....believe me it can be done. Plus talk to Carnival they'll tell you what you need to do if you miss it, I would not want you to get false info on that.