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

🇺🇸 N560AS - Boeing 737NG 890/W - Alaska Airlines ASA6/AS6, Los Angeles (LAX) to Ronald Reagan Washington Ntl (DCA) - 4.4 mi away @ 36825 ft, heading E at 623 mph. Spotted for first time! [04:58:56 PM CST] #A726FB #N560AS #B738 #ALASKA #ASA6 #AS6 #ADSB #ADSBbot