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

🇺🇸 N966AK - Boeing 737MAX 9 - Alaska Airlines ASA360/AS360, Seattle-Tacoma (SEA) to Tampa (TPA) - 4.5 mi away @ 33500 ft, heading SE at 578 mph. Spotted 4x before! [02:42:24 AM CST] #AD727A #N966AK #B39M #ALASKA #ASA360 #AS360 #ADSB #ADSBbot