Average flt time CLT to STT?

A random search for flights from Charlotte (CLT) to St Thomas (STT) shows:

OPTION 1: 3hr 38min Nonstop

CLT - STT US Airways Flt 1040 Dep 11:40am 28May,Fri

Flight Duration: 3hr 38min

One stop flights are much cheaper.

OPTION 2: 6hr 28min via San Juan (SJU)

CLT - SJU US Airways Flt 1568 Dep 11:45am 28May,Fri

SJU - STT Cape Air Flt 831 Dep 05:40pm 28May,Fri

Flight Duration: 4hr 10min; Layover Time: 2hr 18min; Total Trip Time: 6hr 28min