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

🇺🇸 N8862Q - Boeing 737MAX 8 - Southwest Airlines SWA2121/WN2121, Harry Reid (LAS) to Baltimore/Washington Thurgood Marshall (BWI) - 4.2 mi away @ 35300 ft, heading E at 682 mph. Spotted 56x before! [10:47:49 AM CST] #AC36CC #N8862Q #B38M #SOUTHWEST #SWA2121 #WN2121 #ADSB #ADSBbot

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

🇺🇸 N8504G - Boeing 737NG 800/W - Southwest Airlines SWA2121/WN2121, Harry Reid (LAS) to Baltimore/Washington Thurgood Marshall (BWI) - 4.8 mi away @ 39325 ft, heading E at 674 mph. Spotted 56x before! [10:51:20 AM CST] #ABAA43 #N8504G #B738 #SOUTHWEST #SWA2121 #WN2121 #ADSB #ADSBbot