We do everything possible to fly non-stop, so we always drive to Philadelphia from Baltimore. We've been to SXM most every year for the last 10 years and we have never had any major issues departing or arriving in Philadelphia. We are not connecting to another flight, so we do not have that worry. Some years the lines are longer than others, but lucky for us it has never been anything terrible.
I think I just jinxed us for our February flight.
Scott