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

🇺🇸 N506DA - Airbus A321 271NXSL - Delta Air Lines DAL859/DL859, General Edward Lawrence Logan (BOS) to Salt Lake City (SLC) - 4.4 mi away @ 36175 ft, heading WSW at 495 mph. Spotted 2x before! [07:36:54 AM CDT] #A65086 #N506DA #A21N #DELTA #DAL859 #DL859 #ADSB #ADSBbot

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

🇺🇸 N506DA - Airbus A321 271NXSL - Delta Air Lines DAL2794/DL2794, Harry Reid (LAS) to Cincinnati/Northern Kentucky (CVG) - 4.0 mi away @ 33525 ft, heading E at 633 mph. Spotted once before! [04:24:49 AM CST] #A65086 #N506DA #A21N #DELTA #DAL2794 #DL2794 #ADSB #ADSBbot