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

🇺🇸 N963NK - Airbus A320 271NSL - Spirit Airlines NKS2015/NK2015, Baltimore/Washington Thurgood Marshall (BWI) to Harry Reid (LAS) - 4.6 mi away @ 36400 ft, heading W at 441 mph. Spotted 5x before! [08:32:07 AM CDT] #AD6881 #N963NK #A20N #SPIRIT_WINGS #NKS2015 #NK2015 #ADSB #ADSBbot