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

🇺🇸 N590AS - Boeing 737NG 890/W - Alaska Airlines ASA260/AS260, General Edward Lawrence Logan (BOS) to San Diego (SAN) - 5.8 mi away @ 36175 ft, heading WSW at 522 mph. Spotted 6x before! [10:32:16 AM CDT] #A79D78 #N590AS #B738 #ALASKA #ASA260 #AS260 #ADSB #ADSBbot