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

🇺🇸 N991NK - Airbus A320 271NSL - Spirit Airlines NKS2731/NK2731, Harry Reid (LAS) to Newark Liberty (EWR) - 4.6 mi away @ 39150 ft, heading ENE at 538 mph. Spotted 3x before! [02:48:13 AM CDT] #ADD790 #N991NK #A20N #SPIRIT_WINGS #NKS2731 #NK2731 #ADSB #ADSBbot