Steven P. McNicoll wrote:

I thought there were only two SWA flights. If a SWA flight landed at PVD at
11:57 and another SWA flight returned to BWI before it was past Manhattan
then what SWA flight missed an approach at PVD?

These are the two flights that didn't land at PVD:
SWA2020 was flying from MCO to PVD, scheduled to land at 11:44pm
SWA946 was flying from BWI to PVD, scheduled to land around 10:20pm
The first missed the approach about two minutes after midnight, and the
second turned around about halfway there, around 17 to 19 minutes after
midnight. The other flight I mentioned, SWA 1729 from LAS, I believe
actually landed at PVD at 11:51pm.

All this is from FlightAware (you may have to register to view the
links, I'm not sure):
http://flightaware.com/live/flight/S...357Z/KBWI/KBWI
http://flightaware.com/live/flight/S...157Z/KMCO/KPVD
http://flightaware.com/live/flight/S...303Z/KLAS/KPVD