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

🇺🇸 N712FR - Airbus A321 211SL - Frontier Airlines FFT9087/F99087, Cancun (CUN) to St Louis Lambert (STL) - 3.3 mi away @ 3625 ft, heading ENE at 222 mph. Spotted 45x before! [05:51:21 PM CDT] #A98408 #N712FR #A321 #FRONTIER_FLIGHT #FFT9087 #F99087 #Landing #Arrival #ADSB #ADSBbot