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

🇺🇸 N24537 - AIRBUS S A S A321-271NX - UNITED AIRLINES INC UAL1397/UA1397, Chicago O'Hare (ORD) to George Bush Intcntl/Houston (IAH) - 3.8 mi away @ 31250 ft, heading SW at 477 mph. Spotted 2x before! [07:49:54 AM CDT] #A24573 #N24537 #A21N #UAL1397 #UA1397 #ADSB #ADSBbot

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

🇺🇸 N24510 - Airbus A321 271NXSL - United Airlines UAL1397/UA1397, Chicago O'Hare (ORD) to George Bush Intcntl/Houston (IAH) - 4.5 mi away @ 37100 ft, heading SW at 517 mph. Spotted 2x before! [07:50:16 AM CDT] #A24526 #N24510 #A21N #UNITED #UAL1397 #UA1397 #ADSB #ADSBbot