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

🇺🇸 N724NK - Airbus A321 271NXSL - Spirit Airlines NKS1584/NK1584, Harry Reid (LAS) to Newark Liberty (EWR) - 4.3 mi away @ 36825 ft, heading ENE at 541 mph. Spotted once before! [03:34:18 AM CDT] #A9B39E #N724NK #A21N #SPIRIT_WINGS #NKS1584 #NK1584 #ADSB #ADSBbot