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

🇺🇸 N660NK - Airbus A321 231SL - Spirit Airlines NKS601/NK601, Baltimore/Washington Thurgood Marshall (BWI) to Dallas-Fort Worth (DFW) - 4.2 mi away @ 33900 ft, heading SW at 404 mph. Spotted 7x before! [12:16:38 PM CDT] #A8B56F #N660NK #A321 #SPIRIT_WINGS #NKS601 #NK601 #ADSB #ADSBbot