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

🇺🇸 N620NK - Airbus A320 232SL - Spirit Airlines NKS316/NK316, Chicago O'Hare (ORD) to George Bush Intcntl/Houston (IAH) - 3.9 mi away @ 30150 ft, heading SW at 553 mph. Spotted 6x before! [04:53:27 PM CDT] #A81773 #N620NK #A320 #SPIRIT_WINGS #NKS316 #NK316 #ADSB #ADSBbot