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

🇺🇸 N8866H - Boeing 737MAX 8 - Southwest Airlines SWA4458/WN4458, Baltimore/Washington Thurgood Marshall (BWI) to San Diego (SAN) - 4.4 mi away @ 34100 ft, heading W at 384 mph. Spotted 99x before. [07:56:10 PM CST] #AC3751 #N8866H #B38M #SOUTHWEST #SWA4458 #WN4458 #ADSB #ADSBbot

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

🇺🇸 N8913S - Boeing 737MAX 8 - Southwest Airlines SWA4458/WN4458, Baltimore/Washington Thurgood Marshall (BWI) to San Diego (SAN) - 4.2 mi away @ 35250 ft, heading W at 413 mph. Spotted 52x before. [07:35:56 AM CST] #AC4BDD #N8913S #B38M #SOUTHWEST #SWA4458 #WN4458 #ADSB #ADSBbot