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

🇺🇸 N909WN - Boeing 737NG 7H4/W - Southwest Airlines SWA42/WN42 (HOU-DAL-MKE) - 4.9 mi away @ 38550 ft, heading NNE at 544 mph. Spotted 55x before! [07:35:21 PM CST] #AC929C #N909WN #B737 #SOUTHWEST #SWA42 #WN42 #ADSB #ADSBbot