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

🇺🇸 N849SY - Boeing 737NG 8JP/W - Sun Country Airlines SCX8728/SY8728, St Louis Lambert (STL) to Salt Lake City (SLC) - 3.5 mi away @ 12950 ft, heading WNW at 413 mph. Spotted 8x before! [02:12:19 PM CDT] #ABA2EF #N849SY #B738 #SUN_COUNTRY #SCX8728 #SY8728 #TakingOff #Departure #ADSB #ADSBbot