Other Caribbean flights by SWA:
18 Oct: MCO-SJU
17 Oct: SWA8735 BWI-SJU via a diversion to STX (St Croix)
17 Oct: SWA8736 SJU-MCO
16 Oct: SWA8737 BWI-SJU via a diversion to BQN (Aguadilla)
16 Oct: SWA8734 SJU to BWI
What is your source for the flights you mentioned being proving runs? My research shows that AirTran is increasing service to SJU. I couldn’t find any mention of SWA serving SJU on a scheduled basis. Could these have been equipment substitutions for AirTran flights? (See Southwest Insider)