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

🇺🇸 N311FR - Airbus A320 251NSL - Frontier Airlines FFT1398/F91398, George Bush Intcntl/Houston (IAH) to Chicago Midway (MDW) - 4.1 mi away @ 32700 ft, heading NNE at 587 mph. Spotted 22x before! [08:19:03 PM CST] #A34B15 #N311FR #A20N #FRONTIER_FLIGHT #FFT1398 #F91398 #ADSB #ADSBbot

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

🇺🇸 N311FR - Airbus A320 251NSL - Frontier Airlines FFT2635/F92635, Orlando (MCO) to St Louis Lambert (STL) - 3.4 mi away @ 2900 ft, heading NNW at 264 mph. Spotted 21x before! [09:20:25 AM CST] #A34B15 #N311FR #A20N #FRONTIER_FLIGHT #FFT2635 #F92635 #Landing #Arrival #ADSB #ADSBbot

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

🇺🇸 N311FR - Airbus A320 251NSL - Frontier Airlines FFT45/F945, Cancun (CUN) to Chicago O'Hare (ORD) - 4.7 mi away @ 37650 ft, heading N at 519 mph. Spotted 20x before! [02:00:39 PM CDT] #A34B15 #N311FR #A20N #FRONTIER_FLIGHT #FFT45 #F945 #ADSB #ADSBbot

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

🇺🇸 N311FR - Airbus A320 251NSL - Frontier Airlines FFT2799/F92799, Chicago O'Hare (ORD) to Austin-Bergstrom (AUS) - 4.5 mi away @ 39800 ft, heading SW at 520 mph. Spotted 19x before! [08:31:01 AM CDT] #A34B15 #N311FR #A20N #FRONTIER_FLIGHT #FFT2799 #F92799 #ADSB #ADSBbot