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

🇺🇸 N413FR - FRONTIER AIRLINES INC. FFT3241/F93241, Chicago O'Hare (ORD) to Dallas-Fort Worth (DFW) - 4.5 mi away @ 38275 ft, heading SW at 437 mph. Spotted once before. [07:12:56 PM CST] #A4DFD2 #N413FR #A20N #FFT3241 #F93241 #ADSB #ADSBbot

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

🇺🇸 N413FR - Frontier Airlines FFT2438/F92438, St Louis Lambert (STL) to Tampa (TPA) - 4.1 mi away @ 9750 ft, heading SSE at 384 mph. Spotted for first time! [09:08:41 AM CST] #A4DFD2 #N413FR #A20N #FRONTIER_FLIGHT #FFT2438 #F92438 #TakingOff #Departure #ADSB #ADSBbot