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

🇺🇸 N8518R - Boeing 737NG 800/W - Southwest Airlines SWA503/WN503, Austin-Bergstrom (AUS) to Baltimore/Washington Thurgood Marshall (BWI) - 4.7 mi away @ 38625 ft, heading NE at 524 mph. Spotted 69x before! [06:16:25 PM CDT] #ABAE8F #N8518R #B738 #SOUTHWEST #SWA503 #WN503 #ADSB #ADSBbot

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

🇺🇸 N936WN - Boeing 737NG 7H4/W - Southwest Airlines SWA503/WN503 (ORD-DAL-AUS-ELP-LGB) - 4.8 mi away @ 39550 ft, heading SW at 468 mph. Spotted 59x before! [08:29:24 AM CST] #ACFDF4 #N936WN #B737 #SOUTHWEST #SWA503 #WN503 #ADSB #ADSBbot