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

🇺🇸 N8846Q - Boeing 737MAX 8 - Southwest Airlines SWA21/WN21 (BWI-MDW-DAL-HOU) - 5.5 mi away @ 39125 ft, heading SW at 528 mph. Spotted 67x before! [09:37:26 AM CDT] #AC2FEA #N8846Q #B38M #SOUTHWEST #SWA21 #WN21 #ADSB #ADSBbot

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

🇺🇸 N8537Z - Boeing 737NG 800/W - Southwest Airlines SWA21/WN21 (BWI-MDW-DAL-HOU) - 4.3 mi away @ 37025 ft, heading SW at 434 mph. Spotted 73x before! [09:49:55 AM CDT] #ABB5E2 #N8537Z #B738 #SOUTHWEST #SWA21 #WN21 #ADSB #ADSBbot

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

🇺🇸 N8847Q - Boeing 737MAX 8 - Southwest Airlines SWA21/WN21 (BWI-MDW-DAL-HOU) - 4.4 mi away @ 34925 ft, heading SW at 502 mph. Spotted 55x before! [09:43:31 AM CDT] #AC300D #N8847Q #B38M #SOUTHWEST #SWA21 #WN21 #ADSB #ADSBbot