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

🇺🇸 N17583 - Boeing 737MAX 9 - United Airlines UAL1355/UA1355 (LAS-SFO-IAD) - 4.4 mi away @ 37025 ft, heading ESE at 535 mph. Spotted 2x before! [03:58:03 PM CDT] #A12F4C #N17583 #B39M #UNITED #UAL1355 #UA1355 #ADSB #ADSBbot

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

🇺🇸 N17583 - Boeing 737MAX 9 - United Airlines UAL1973/UA1973 (DFW-IAH-STL) - 3.4 mi away @ 3350 ft, heading N at 327 mph. Spotted once before! [12:01:49 AM CDT] #A12F4C #N17583 #B39M #UNITED #UAL1973 #UA1973 #Landing #ADSB #ADSBbot

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

🇺🇸 N17583 - Boeing 737MAX 9 - United Airlines UAL2482/UA2482, Chicago O'Hare (ORD) to George Bush Intcntl/Houston (IAH) - 4.3 mi away @ 35150 ft, heading SW at 512 mph. Spotted for first time! [08:21:29 AM CST] #A12F4C #N17583 #B39M #UNITED #UAL2482 #UA2482 #ADSB #ADSBbot