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🇺🇸 N331FR - Airbus A320 251NSL - Frontier Airlines FFT4567/F94567, St Louis Lambert (STL) to Denver (DEN) - 3.6 mi away @ 15275 ft, heading WNW at 379 mph. Spotted 23x before. [08:15:42 PM CDT] #A39A13 #N331FR #A20N #FRONTIER_FLIGHT #FFT4567 #F94567 #Departure #ADSB #ADSBbot
Map of the St. Louis area showing the position and track of the aircraft described in the post.
September 27, 2026 at 1:15 AM
abovestlouis.com
🇺🇸 N437FR - AIRBUS SAS A320-271N - UMB BANK NA TRUSTEE FFT4567/F94567, St Louis Lambert (STL) to Denver (DEN) - 3.7 mi away @ 14200 ft, heading NW at 441 mph. Spotted for first time! [10:35:30 PM CDT] #A53DAC #N437FR #A20N #FFT4567 #F94567 #TakingOff #Departure #ADSB #ADSBbot
Map of the St. Louis area showing the position and track of the aircraft described in the post.
September 26, 2026 at 3:35 AM
abovestlouis.com
🇺🇸 N712FR - Airbus A321 211SL - Frontier Airlines FFT4567/F94567, St Louis Lambert (STL) to Denver (DEN) - 3.3 mi away @ 14925 ft, heading WNW at 475 mph. Spotted 40x before! [07:06:59 PM CDT] #A98408 #N712FR #A321 #FRONTIER_FLIGHT #FFT4567 #F94567 #Landing #Departure #ADSB #ADSBbot
Map of the St. Louis area showing the position and track of the aircraft described in the post.
May 10, 2025 at 12:07 AM
abovestlouis.com
🇺🇸 N631FR - Airbus A321 271NXSL - Frontier Airlines FFT4567/F94567, St Louis Lambert (STL) to Denver (DEN) - 3.2 mi away @ 13500 ft, heading WNW at 416 mph. Spotted 16x before! [07:09:23 PM CDT] #A84200 #N631FR #A21N #FRONTIER_FLIGHT #FFT4567 #F94567 #TakingOff #Departure #ADSB #ADSBbot
Map of the St. Louis area showing the position and track of the aircraft described in the post.
May 13, 2025 at 12:09 AM
abovestlouis.com
🇺🇸 N236FR - Airbus A320 214SL - Frontier Airlines FFT4567/F94567, St Louis Lambert (STL) to Denver (DEN) - 3.6 mi away @ 13400 ft, heading NW at 414 mph. Spotted 29x before. [11:18:56 PM CDT] #A21F57 #N236FR #A320 #FRONTIER_FLIGHT #FFT4567 #F94567 #Landing #Departure #ADSB #ADSBbot
Map of the St. Louis area showing the position and track of the aircraft described in the post.
September 17, 2026 at 4:19 AM
abovestlouis.com
🇺🇸 N323FR - Airbus A320 251NSL - Frontier Airlines FFT4567/F94567, St Louis Lambert (STL) to Denver (DEN) - 3.8 mi away @ 14325 ft, heading WNW at 424 mph. Spotted 38x before. [08:08:43 PM CDT] #A37A02 #N323FR #A20N #FRONTIER_FLIGHT #FFT4567 #F94567 #TakingOff #Departure #ADSB #ADSBbot
Map of the St. Louis area showing the position and track of the aircraft described in the post.
September 8, 2026 at 1:08 AM
abovestlouis.com
🇺🇸 N238FR - Airbus A320 214SL - Frontier Airlines FFT4567/F94567, St Louis Lambert (STL) to Denver (DEN) - 4.0 mi away @ 11700 ft, heading NW at 383 mph. Spotted 26x before. [09:22:56 PM CDT] #A226C5 #N238FR #A320 #FRONTIER_FLIGHT #FFT4567 #F94567 #Landing #Departure #ADSB #ADSBbot
Map of the St. Louis area showing the position and track of the aircraft described in the post.
August 25, 2026 at 2:23 AM
abovestlouis.com
🇺🇸 N405FR - FRONTIER AIRLINES INC. FFT4567/F94567, St Louis Lambert (STL) to Denver (DEN) - 3.5 mi away @ 8600 ft, heading SW at 341 mph. Spotted 6x before. [08:27:33 PM CDT] #A4BFC1 #N405FR #A20N #FFT4567 #F94567 #TakingOff #Departure #ADSB #ADSBbot
Map of the St. Louis area showing the position and track of the aircraft described in the post.
August 18, 2026 at 1:27 AM
abovestlouis.com
🇺🇸 N391FR - Airbus A320 251NSL - Frontier Airlines FFT4567/F94567, St Louis Lambert (STL) to Denver (DEN) - 5.5 mi away @ 15625 ft, heading WNW at 381 mph. Spotted 37x before. [09:11:47 PM CDT] #A4870D #N391FR #A20N #FRONTIER_FLIGHT #FFT4567 #F94567 #Departure #ADSB #ADSBbot
Map of the St. Louis area showing the position and track of the aircraft described in the post.
August 16, 2026 at 2:11 AM
abovestlouis.com
🇺🇸 N405FR - FRONTIER AIRLINES INC. FFT4567/F94567, St Louis Lambert (STL) to Denver (DEN) - 3.5 mi away @ 14800 ft, heading WNW at 385 mph. Spotted 3x before. [09:03:56 PM CDT] #A4BFC1 #N405FR #A20N #FFT4567 #F94567 #TakingOff #Departure #ADSB #ADSBbot
Map of the St. Louis area showing the position and track of the aircraft described in the post.
August 11, 2026 at 2:04 AM
abovestlouis.com
🇺🇸 N435FR - Frontier Airlines FFT4567/F94567, St Louis Lambert (STL) to Denver (DEN) - 3.4 mi away @ 14925 ft, heading WNW at 390 mph. Spotted once before. [08:55:38 PM CDT] #A5363E #N435FR #A20N #FRONTIER_FLIGHT #FFT4567 #F94567 #TakingOff #Departure #ADSB #ADSBbot
Map of the St. Louis area showing the position and track of the aircraft described in the post.
August 9, 2026 at 1:55 AM
abovestlouis.com
🇺🇸 N372FR - Airbus A320 251NSL - Frontier Airlines FFT4567/F94567, St Louis Lambert (STL) to Denver (DEN) - 3.2 mi away @ 15175 ft, heading NW at 428 mph. Spotted 39x before. [08:20:58 PM CDT] #A43BC6 #N372FR #A20N #FRONTIER_FLIGHT #FFT4567 #F94567 #Departure #ADSB #ADSBbot
Map of the St. Louis area showing the position and track of the aircraft described in the post.
August 1, 2026 at 1:21 AM
abovestlouis.com
🇺🇸 N434FR - Frontier Airlines FFT4567/F94567, St Louis Lambert (STL) to Denver (DEN) - 3.9 mi away @ 14025 ft, heading WNW at 358 mph. Spotted once before. [08:26:52 PM CDT] #A53287 #N434FR #A20N #FRONTIER_FLIGHT #FFT4567 #F94567 #TakingOff #Departure #ADSB #ADSBbot
Map of the St. Louis area showing the position and track of the aircraft described in the post.
July 25, 2026 at 1:27 AM
abovestlouis.com
🇺🇸 N405FR - FRONTIER AIRLINES INC. FFT4567/F94567, St Louis Lambert (STL) to Denver (DEN) - 3.4 mi away @ 13500 ft, heading WNW at 429 mph. Spotted once before. [08:42:37 PM CDT] #A4BFC1 #N405FR #A20N #FFT4567 #F94567 #Landing #Departure #ADSB #ADSBbot
Map of the St. Louis area showing the position and track of the aircraft described in the post.
July 24, 2026 at 1:42 AM
abovestlouis.com
🇺🇸 N402FR - Frontier Airlines FFT4567/F94567, St Louis Lambert (STL) to Denver (DEN) - 3.4 mi away @ 13925 ft, heading WNW at 397 mph. Spotted for first time! [09:42:59 PM CDT] #A4B49C #N402FR #A20N #FRONTIER_FLIGHT #FFT4567 #F94567 #TakingOff #Departure #ADSB #ADSBbot
Map of the St. Louis area showing the position and track of the aircraft described in the post.
July 23, 2026 at 2:43 AM
abovestlouis.com
🇺🇸 N323FR - Airbus A320 251NSL - Frontier Airlines FFT4567/F94567, St Louis Lambert (STL) to Denver (DEN) - 3.5 mi away @ 12600 ft, heading WNW at 454 mph. Spotted 33x before. [09:21:22 PM CDT] #A37A02 #N323FR #A20N #FRONTIER_FLIGHT #FFT4567 #F94567 #Landing #Departure #ADSB #ADSBbot
Map of the St. Louis area showing the position and track of the aircraft described in the post.
July 21, 2026 at 2:21 AM
abovestlouis.com
🇺🇸 N434FR - FRONTIER AIRLINES INC. FFT4567/F94567, St Louis Lambert (STL) to Denver (DEN) - 3.5 mi away @ 13550 ft, heading NW at 431 mph. Spotted for first time! [08:29:28 PM CDT] #A53287 #N434FR #A20N #FFT4567 #F94567 #Landing #Departure #ADSB #ADSBbot
Map of the St. Louis area showing the position and track of the aircraft described in the post.
July 20, 2026 at 1:29 AM
abovestlouis.com
🇺🇸 N430FR - FRONTIER AIRLINES INC. FFT4567/F94567, St Louis Lambert (STL) to Denver (DEN) - 3.6 mi away @ 15000 ft, heading WNW at 433 mph. Spotted 4x before. [08:27:04 PM CDT] #A523AB #N430FR #FFT4567 #F94567 #Departure #ADSB #ADSBbot
Map of the St. Louis area showing the position and track of the aircraft described in the post.
July 15, 2026 at 1:27 AM
abovestlouis.com
🇺🇸 N336FR - Airbus A320 251NSL - Frontier Airlines FFT4567/F94567, St Louis Lambert (STL) to Denver (DEN) - 3.3 mi away @ 16150 ft, heading WNW at 429 mph. Spotted 23x before. [08:16:29 PM CDT] #A3ACA6 #N336FR #A20N #FRONTIER_FLIGHT #FFT4567 #F94567 #Departure #ADSB #ADSBbot
Map of the St. Louis area showing the position and track of the aircraft described in the post.
July 14, 2026 at 1:16 AM
abovestlouis.com
🇺🇸 N395FR - Airbus A320 251NSL - Frontier Airlines FFT4567/F94567, St Louis Lambert (STL) to Denver (DEN) - 3.3 mi away @ 15050 ft, heading WNW at 377 mph. Spotted 31x before. [07:45:12 PM CDT] #A495E9 #N395FR #A20N #FRONTIER_FLIGHT #FFT4567 #F94567 #Departure #ADSB #ADSBbot
Map of the St. Louis area showing the position and track of the aircraft described in the post.
July 5, 2026 at 12:45 AM
abovestlouis.com
🇺🇸 N392FR - Airbus A320 251NSL - Frontier Airlines FFT4567/F94567, St Louis Lambert (STL) to Denver (DEN) - 3.3 mi away @ 11575 ft, heading NW at 376 mph. Spotted 28x before. [08:20:55 PM CDT] #A48AC4 #N392FR #A20N #FRONTIER_FLIGHT #FFT4567 #F94567 #TakingOff #Departure #ADSB #ADSBbot
Map of the St. Louis area showing the position and track of the aircraft described in the post.
July 2, 2026 at 1:21 AM
abovestlouis.com
🇺🇸 N353FR - Airbus A320 251NSL - Frontier Airlines FFT4567/F94567, St Louis Lambert (STL) to Denver (DEN) - 3.7 mi away @ 13375 ft, heading WNW at 385 mph. Spotted 26x before. [07:51:42 PM CDT] #A3F07F #N353FR #A20N #FRONTIER_FLIGHT #FFT4567 #F94567 #TakingOff #Departure #ADSB #ADSBbot
Map of the St. Louis area showing the position and track of the aircraft described in the post.
June 30, 2026 at 12:51 AM
abovestlouis.com
🇺🇸 N392FR - Airbus A320 251NSL - Frontier Airlines FFT4567/F94567, St Louis Lambert (STL) to Denver (DEN) - 3.3 mi away @ 14825 ft, heading WNW at 377 mph. Spotted 27x before. [08:22:47 PM CDT] #A48AC4 #N392FR #A20N #FRONTIER_FLIGHT #FFT4567 #F94567 #TakingOff #Departure #ADSB #ADSBbot
Map of the St. Louis area showing the position and track of the aircraft described in the post.
June 29, 2026 at 1:22 AM
abovestlouis.com
🇺🇸 N438FR - FRONTIER AIRLINES INC. FFT4567/F94567, St Louis Lambert (STL) to Denver (DEN) - 3.2 mi away @ 6225 ft, heading SW at 303 mph. Spotted 8x before. [08:24:33 PM CDT] #A54163 #N438FR #A20N #FFT4567 #F94567 #Landing #Departure #ADSB #ADSBbot
Map of the St. Louis area showing the position and track of the aircraft described in the post.
June 28, 2026 at 1:24 AM
abovestlouis.com
🇺🇸 N430FR - Frontier Airlines FFT4567/F94567 - 3.6 mi away @ 14375 ft, heading NW at 446 mph. Spotted 3x before. [08:22:56 PM CDT] #A523AB #N430FR #FRONTIER_FLIGHT #FFT4567 #F94567 #TakingOff #ADSB #ADSBbot
Map of the St. Louis area showing the position and track of the aircraft described in the post.
June 24, 2026 at 1:23 AM