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

🇺🇸 N121UW - Airbus A320 214 - American Airlines AAL1918/AA1918, Austin-Bergstrom (AUS) to Philadelphia (PHL) - 4.5 mi away @ 37225 ft, heading NE at 557 mph. Spotted 29x before! [05:41:49 PM CDT] #A05940 #N121UW #A320 #AMERICAN #AAL1918 #AA1918 #ADSB #ADSBbot