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

🇺🇸 N987NK - Airbus A320 271NSL - Spirit Airlines NKS2015/NK2015, Baltimore/Washington Thurgood Marshall (BWI) to Harry Reid (LAS) - 4.6 mi away @ 36500 ft, heading W at 479 mph. Spotted once before! [08:16:12 AM CDT] #ADC65B #N987NK #A20N #SPIRIT_WINGS #NKS2015 #NK2015 #ADSB #ADSBbot