Map of the St. Louis area showing the position and track of the aircraft described in the post.
🇺🇸 N297AK - Boeing 737NG 900ER/W - Alaska Airlines ASA388/AS388 (SEA-STL-SEA) - 3.3 mi away @ 13300 ft, heading NW at 410 mph. Spotted 10x before. [04:08:04 PM CDT] #A30F85 #N297AK #B739 #ALASKA #ASA388 #AS388 #TakingOff #ADSB #ADSBbot