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

🇺🇸 N334FR - Airbus A320 251NSL - Frontier Airlines FFT3161/F93161, Laguardia (LGA) to Denver (DEN) - 4.8 mi away @ 40300 ft, heading WSW at 519 mph. Spotted 30x before! [11:58:01 PM CDT] #A3A538 #N334FR #A20N #FRONTIER_FLIGHT #FFT3161 #F93161 #ADSB #ADSBbot