I took the flight from SXM to Charlotte today (Monday). Everything in St. Maarten was smooth -- the airport departure lounge wasn't crowded, and lines weren't long. Of course, it's not a Saturday.

Charlotte is a different story. After U.S. immigration, there was a very long line for everyone to be re-screened by security before we were allowed to make our connecting flight. So U.S. airports have problems, too.