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

🇺🇸 N804SY - Boeing 737NG 8Q8/W - Sun Country Airlines SCX556/SY556, Cancun (CUN) to General Mitchell (MKE) - 4.0 mi away @ 34175 ft, heading NNE at 557 mph. Spotted 3x before! [02:23:21 PM CST] #AAF260 #N804SY #B738 #SUN_COUNTRY #SCX556 #SY556 #ADSB #ADSBbot