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

🇺🇸 N977AK - Boeing 737MAX 9 - Alaska Airlines ASA36/AS36, San Diego (SAN) to John F Kennedy (JFK) - 4.1 mi away @ 37225 ft, heading ENE at 638 mph. Spotted 6x before. [04:13:36 AM CST] #AD9DB0 #N977AK #B39M #ALASKA #ASA36 #AS36 #ADSB #ADSBbot