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

🇺🇸 N671NK - Airbus A321 231SL - Spirit Airlines NKS2228/NK2228, Dallas-Fort Worth (DFW) to Newark Liberty (EWR) - 4.2 mi away @ 34750 ft, heading NE at 635 mph. Spotted 9x before. [02:48:51 PM CST] #A8E0A5 #N671NK #A321 #SPIRIT_WINGS #NKS2228 #NK2228 #ADSB #ADSBbot