Map of the St. Louis area showing the position and track of the aircraft described in the post.
🇺🇸 N933AK - Boeing 737MAX 9 - Alaska Airlines ASA473/AS473, St Louis Lambert (STL) to Seattle-Tacoma (SEA) - 3.3 mi away @ 13700 ft, heading NW at 413 mph. Spotted 4x before. [07:18:14 AM CDT] #ACF0D8 #N933AK #B39M #ALASKA #ASA473 #AS473 #TakingOff #Departure #ADSB #ADSBbot