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

🇺🇸 N531AS - Boeing 737NG 890/W - Alaska Airlines ASA114/AS114, John F Kennedy (JFK) to San Francisco (SFO) - 4.0 mi away @ 34575 ft, heading W at 423 mph. Spotted 5x before. [11:15:52 PM CST] #A6B435 #N531AS #B738 #ALASKA #ASA114 #AS114 #ADSB #ADSBbot