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

🇺🇸 N37437 - Boeing 737NG 924ER/W - United Airlines UAL1681/UA1681, Washington Dulles (IAD) to Los Angeles (LAX) - 4.0 mi away @ 31500 ft, heading W at 506 mph. Spotted 5x before! [08:51:50 PM CDT] #A44588 #N37437 #B739 #UNITED #UAL1681 #UA1681 #ADSB #ADSBbot

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

🇺🇸 N37471 - Boeing 737NG 924ER/W - United Airlines UAL1681/UA1681, Washington Dulles (IAD) to Los Angeles (LAX) - 4.0 mi away @ 32975 ft, heading W at 462 mph. Spotted 8x before! [09:16:14 PM CDT] #A4460E #N37471 #B739 #UNITED #UAL1681 #UA1681 #ADSB #ADSBbot

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

🇺🇸 N37420 - Boeing 737NG 924ER/W - United Airlines UAL1681/UA1681, Washington Dulles (IAD) to Los Angeles (LAX) - 4.2 mi away @ 34875 ft, heading W at 478 mph. Spotted 6x before! [08:59:57 PM CDT] #A4455E #N37420 #B739 #UNITED #UAL1681 #UA1681 #ADSB #ADSBbot