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

🇺🇸 N731NK - Airbus A321 271NXSL - Spirit Airlines NKS2475/NK2475, Chicago O'Hare (ORD) to Louis Armstrong New Orleans (MSY) - 4.3 mi away @ 35475 ft, heading SW at 505 mph. Spotted 4x before! [11:06:39 AM CDT] #A9CFF8 #N731NK #A21N #SPIRIT_WINGS #NKS2475 #NK2475 #ADSB #ADSBbot