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

🇺🇸 N530AS - Boeing 737NG 890/W - Alaska Airlines ASA7/AS7, Ronald Reagan Washington Ntl (DCA) to San Francisco (SFO) - 4.2 mi away @ 37050 ft, heading W at 433 mph. Spotted 2x before! [07:40:01 PM CST] #A6B07E #N530AS #B738 #ALASKA #ASA7 #AS7 #ADSB #ADSBbot