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

🇺🇸 N901WN - Boeing 737NG 7H4/W - Southwest Airlines SWA2100/WN2100, Myrtle Beach (MYR) to Denver (DEN) - 21.6 mi away @ 38900 ft, heading WNW at 497 mph. Spotted 77x before! [04:34:51 PM CDT] #AC74E4 #N901WN #B737 #SOUTHWEST #SWA2100 #WN2100 #ADSB #ADSBbot