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

🇺🇸 N508AS - Boeing 737NG 890/W - Alaska Airlines ASA388/AS388 (SEA-STL-SEA) - 3.6 mi away @ 11600 ft, heading WNW at 377 mph. Spotted 2x before. [05:45:50 PM CST] #A657B9 #N508AS #B738 #ALASKA #ASA388 #AS388 #Landing #ADSB #ADSBbot

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

🇺🇸 N508AS - Boeing 737NG 890/W - Alaska Airlines ASA388/AS388 - 3.4 mi away @ 15025 ft, heading WNW at 379 mph. Spotted once before! [03:02:47 PM CST] #A657B9 #N508AS #B738 #ALASKA #ASA388 #AS388 #ADSB #ADSBbot