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

🇺🇸 N504DZ - Airbus A321 271NXSL - Delta Air Lines DAL571/DL571, General Edward Lawrence Logan (BOS) to San Diego (SAN) - 3.9 mi away @ 32575 ft, heading W at 449 mph. Spotted 8x before! [07:07:00 PM CST] #A6492F #N504DZ #A21N #DELTA #DAL571 #DL571 #ADSB #ADSBbot

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

🇺🇸 N525DA - Airbus A321 271NXSL - Delta Air Lines DAL571/DL571 (BOS-SAN-BOS) - 4.0 mi away @ 34075 ft, heading W at 481 mph. Spotted 3x before! [07:12:38 PM CDT] #A69BCD #N525DA #A21N #DELTA #DAL571 #DL571 #ADSB #ADSBbot

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

🇺🇸 N512DE - Airbus A321 271NXSL - Delta Air Lines DAL571/DL571 (BOS-SAN-BOS) - 4.4 mi away @ 34000 ft, heading SW at 546 mph. Spotted 7x before! [07:17:31 PM CDT] #A6692D #N512DE #A21N #DELTA #DAL571 #DL571 #ADSB #ADSBbot

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

🇺🇸 N505DZ - Airbus A321 271NXSL - Delta Air Lines DAL571/DL571 (BOS-SAN-BOS) - 4.8 mi away @ 39225 ft, heading ENE at 521 mph. Spotted 2x before! [03:12:58 AM CDT] #A64CE6 #N505DZ #A21N #DELTA #DAL571 #DL571 #ADSB #ADSBbot