Steven P. McNicoll wrote:

I thought there were only two SWA flights.

Here's the list of SWA flights into PVD according to their printed
schedule (starting at 9pm):
9:00pm from TPA
9:55pm from BWI
10:30pm from PHX
10:45pm from BWI
11:05pm from MCO
11:25pm from MDW
11:35pm from LAS
It seems that at least three of these were running late that night.