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

🇺🇸 N39728 - Boeing 737NG 724/W - United Airlines UAL247/UA247, Memphis (MEM) to Chicago O'Hare (ORD) - 4.7 mi away @ 39950 ft, heading NNE at 514 mph. Spotted 19x before. [08:05:17 AM CST] #A49F89 #N39728 #B737 #UNITED #UAL247 #UA247 #ADSB #ADSBbot

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

🇺🇸 N39728 - Boeing 737NG 724/W - United Airlines UAL247/UA247, Memphis (MEM) to Chicago O'Hare (ORD) - 4.6 mi away @ 40050 ft, heading N at 516 mph. Spotted 18x before. [08:05:00 AM CST] #A49F89 #N39728 #B737 #UNITED #UAL247 #UA247 #ADSB #ADSBbot

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

🇺🇸 N24706 - Boeing 737NG 724/W - United Airlines UAL247/UA247, Memphis (MEM) to Chicago O'Hare (ORD) - 4.4 mi away @ 35300 ft, heading N at 522 mph. Spotted 16x before. [08:16:41 AM CST] #A24C77 #N24706 #B737 #UNITED #UAL247 #UA247 #ADSB #ADSBbot

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

🇺🇸 N24715 - Boeing 737NG 724/W - United Airlines UAL247/UA247, Memphis (MEM) to Chicago O'Hare (ORD) - 3.2 mi away @ 27300 ft, heading NNE at 539 mph. Spotted 26x before. [08:14:04 AM CST] #A24C99 #N24715 #B737 #UNITED #UAL247 #UA247 #ADSB #ADSBbot