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

🇺🇸 N711FR - Airbus A321 211SL - Frontier Airlines FFT3986/F93986, Dallas-Fort Worth (DFW) to Philadelphia (PHL) - 4.6 mi away @ 35750 ft, heading NE at 578 mph. Spotted 32x before! [01:16:13 PM CDT] #A98051 #N711FR #A321 #FRONTIER_FLIGHT #FFT3986 #F93986 #ADSB #ADSBbot

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

🇺🇸 N642FR - Airbus A321 271NXSL - Frontier Airlines FFT3986/F93986, Dallas-Fort Worth (DFW) to Philadelphia (PHL) - 4.3 mi away @ 37775 ft, heading ENE at 627 mph. Spotted 6x before! [12:18:14 PM CST] #A86D36 #N642FR #A21N #FRONTIER_FLIGHT #FFT3986 #F93986 #ADSB #ADSBbot