Map of the St. Louis area showing the position and track of the aircraft described in the post.

🇺🇸 N8545V - Boeing 737NG 800/W - Southwest Airlines SWA3748/WN3748, Baltimore/Washington Thurgood Marshall (BWI) to Harry Reid (LAS) - 4.5 mi away @ 39425 ft, heading W at 472 mph. Spotted 80x before! [09:56:03 PM CDT] #ABB94F #N8545V #B738 #SOUTHWEST #SWA3748 #WN3748 #ADSB #ADSBbot

Map of the St. Louis area showing the position and track of the aircraft described in the post.

🇺🇸 N8311Q - Boeing 737NG 8H4/W - Southwest Airlines SWA3748/WN3748, Baltimore/Washington Thurgood Marshall (BWI) to Harry Reid (LAS) - 5.0 mi away @ 42300 ft, heading W at 549 mph. Spotted 87x before! [10:17:59 PM CDT] #AB5E9B #N8311Q #B738 #SOUTHWEST #SWA3748 #WN3748 #ADSB #ADSBbot