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

🇺🇸 N639FR - Airbus A321 271NXSL - Frontier Airlines FFT3641/F93641 - 3.5 mi away @ 16700 ft, heading WNW at 358 mph. Spotted 9x before! [08:32:40 PM CST] #A85FB8 #N639FR #A21N #FRONTIER_FLIGHT #FFT3641 #F93641 #ADSB #ADSBbot

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

🇺🇸 N323FR - Airbus A320 251NSL - Frontier Airlines FFT3641/F93641, St Louis Lambert (STL) to Harry Reid (LAS) - 3.4 mi away @ 9875 ft, heading WSW at 300 mph. Spotted 13x before! [09:34:33 PM CST] #A37A02 #N323FR #A20N #FRONTIER_FLIGHT #FFT3641 #F93641 #TakingOff #Departure #ADSB #ADSBbot

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

🇺🇸 N649FR - Airbus A321 271NXSL - Frontier Airlines FFT3641/F93641, St Louis Lambert (STL) to Harry Reid (LAS) - 3.3 mi away @ 13225 ft, heading WNW at 407 mph. Spotted once before! [09:43:34 PM CST] #A88737 #N649FR #A21N #FRONTIER_FLIGHT #FFT3641 #F93641 #TakingOff #Departure #ADSB #ADSBbot