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

🇺🇸 N351FR - Airbus A320 251NSL - Frontier Airlines FFT3281/F93281, Chicago Midway (MDW) to George Bush Intcntl/Houston (IAH) - 4.6 mi away @ 39375 ft, heading WSW at 499 mph. Spotted 44x before! [05:23:45 PM CDT] #A3E911 #N351FR #A20N #FRONTIER_FLIGHT #FFT3281 #F93281 #ADSB #ADSBbot