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

🇺🇸 N991NK - Airbus A320 271NSL - Spirit Airlines NKS941/NK941, Baltimore/Washington Thurgood Marshall (BWI) to Los Angeles (LAX) - 4.4 mi away @ 36700 ft, heading W at 432 mph. Spotted 2x before! [07:00:07 AM CDT] #ADD790 #N991NK #A20N #SPIRIT_WINGS #NKS941 #NK941 #ADSB #ADSBbot