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

🇺🇸 N453AS - Boeing 737NG 990ER/W - Alaska Airlines ASA30/AS30, San Francisco (SFO) to John F Kennedy (JFK) - 4.8 mi away @ 36950 ft, heading ENE at 515 mph. Spotted 4x before! [11:40:41 AM CDT] #A57D52 #N453AS #B739 #ALASKA #ASA30 #AS30 #ADSB #ADSBbot