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

🇺🇸 N732NK - AIRBUS S A S A321-271NX - Spirit Airlines NKS175/NK175, George Bush Intcntl/Houston (IAH) to Chicago O'Hare (ORD) - 4.1 mi away @ 35425 ft, heading NNE at 553 mph. Spotted 2x before! [09:59:41 PM CST] #A9D3AF #N732NK #SPIRIT_WINGS #NKS175 #NK175 #ADSB #ADSBbot

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

🇺🇸 N990NK - Airbus A320 271NSL - Spirit Airlines NKS175/NK175, George Bush Intcntl/Houston (IAH) to Chicago O'Hare (ORD) - 4.3 mi away @ 35275 ft, heading NNE at 598 mph. Spotted once before! [11:06:40 PM CST] #ADD3D9 #N990NK #A20N #SPIRIT_WINGS #NKS175 #NK175 #ADSB #ADSBbot

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

🇺🇸 N924NK - Airbus A320 271NSL - Spirit Airlines NKS175/NK175, George Bush Intcntl/Houston (IAH) to Chicago O'Hare (ORD) - 4.0 mi away @ 33500 ft, heading ENE at 642 mph. Spotted 3x before! [10:16:22 PM CST] #ACCE3C #N924NK #A20N #SPIRIT_WINGS #NKS175 #NK175 #ADSB #ADSBbot