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

🇺🇸 N635FR - Airbus A321 271NXSL - Frontier Airlines FFT2799/F92799, Chicago O'Hare (ORD) to Austin-Bergstrom (AUS) - 4.6 mi away @ 37775 ft, heading SW at 427 mph. Spotted 11x before. [01:13:51 PM CST] #A850DC #N635FR #A21N #FRONTIER_FLIGHT #FFT2799 #F92799 #ADSB #ADSBbot

ICAO: A850DC
Owner: FRONTIER AIRLINES
Flt: FFT3512 N635FR A21N ATL-BOS
Time: 2025-12-29 09:23:06 EST
Min Alt: 3450 ft
Min Dist: 3.7 nm (93° E)
dev adsb planefence by kx1t -•sdr-e•airplanes•flightaware•faa

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

🇺🇸 N635FR - Airbus A321 271NXSL - Frontier Airlines FFT3302/F93302, Denver (DEN) to St Louis Lambert (STL) - 3.4 mi away @ 7650 ft, heading E at 317 mph. Spotted 10x before! [06:23:27 PM CST] #A850DC #N635FR #A21N #FRONTIER_FLIGHT #FFT3302 #F93302 #Landing #Arrival #ADSB #ADSBbot

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

🇺🇸 N635FR - Airbus A321 271NXSL - Frontier Airlines FFT3108/F93108, Harry Reid (LAS) to St Louis Lambert (STL) - 3.4 mi away @ 8250 ft, heading E at 309 mph. Spotted 9x before! [01:15:04 PM CDT] #A850DC #N635FR #A21N #FRONTIER_FLIGHT #FFT3108 #F93108 #Landing #Arrival #ADSB #ADSBbot