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

🇺🇸 N7749B - Boeing 737NG 7BD/W - Southwest Airlines SWA3855/WN3855, St Louis Lambert (STL) to General Edward Lawrence Logan (BOS) - 3.3 mi away @ 9425 ft, heading S at 302 mph. Spotted 70x before! [09:04:18 PM CDT] #AA7B78 #N7749B #B737 #SOUTHWEST #SWA3855 #WN3855 #TakingOff #ADSB #ADSBbot