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

🇺🇸 N310UM - BOEING 737 MAX 8 - AMERICAN AIRLINES INC AAL326/AA326, Juan Santamaria (SJO) to Chicago O'Hare (ORD) - 4.9 mi away @ 40350 ft, heading NNE at 504 mph. Spotted 2x before. [11:04:55 AM CST] #A3489F #N310UM #B38M #AAL326 #AA326 #ADSB #ADSBbot

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

🇺🇸 N310UM - BOEING 737 MAX 8 - AMERICAN AIRLINES INC AAL249/AA249, Chicago O'Hare (ORD) to Licenciado Benito Juarez (MEX) - 4.2 mi away @ 34975 ft, heading SSW at 520 mph. Spotted once before. [09:28:22 AM CST] #A3489F #N310UM #B38M #AAL249 #AA249 #ADSB #ADSBbot

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

🇺🇸 N310UM - BOEING 737-8 - BOEING CO AAL1594/AA1594, Miami (MIA) to St Louis Lambert (STL) - 3.4 mi away @ 5475 ft, heading NNW at 323 mph. Spotted for first time! [12:46:45 AM CDT] #A3489F #N310UM #AAL1594 #AA1594 #Landing #Arrival #ADSB #ADSBbot