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

🇺🇸 N37538 - Boeing 737MAX 9 - United Airlines UAL1355/UA1355, San Francisco (SFO) to Washington Dulles (IAD) - 4.8 mi away @ 34825 ft, heading E at 579 mph. Spotted 5x before! [04:35:37 PM CDT] #A44940 #N37538 #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 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.

🇺🇸 N17303 - Boeing 737MAX 8 - United Airlines UAL1355/UA1355, San Francisco (SFO) to Raleigh-Durham (RDU) - 4.3 mi away @ 36000 ft, heading E at 520 mph. Spotted 9x before! [02:38:35 PM CDT] #A126C6 #N17303 #B38M #UNITED #UAL1355 #UA1355 #ADSB #ADSBbot