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

🇺🇸 N17566 - Boeing 737MAX 9 - United Airlines UAL1977/UA1977, George Bush Intcntl/Houston (IAH) to General Edward Lawrence Logan (BOS) - 4.2 mi away @ 34050 ft, heading NE at 545 mph. Spotted 5x before! [09:09:55 AM CDT] #A12F09 #N17566 #B39M #UNITED #UAL1977 #UA1977 #ADSB #ADSBbot

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

🇺🇸 N33284 - Boeing 737NG 824/W - United Airlines UAL1977/UA1977, George Bush Intcntl/Houston (IAH) to General Edward Lawrence Logan (BOS) - 4.5 mi away @ 37300 ft, heading NE at 658 mph. Spotted 10x before! [09:09:13 AM CST] #A3A0CA #N33284 #B738 #UNITED #UAL1977 #UA1977 #ADSB #ADSBbot