Map of the St. Louis area showing the position and track of the aircraft described in the post.
🇺🇸 N784YX - EMBRAER S A ERJ 170-200 LR - REPUBLIC AIRWAYS INC RPA3527/YX3527, Chicago O'Hare (ORD) to Northwest Arkansas Ntl (XNA) - 4.5 mi away @ 37100 ft, heading SW at 460 mph. Spotted for first time! [10:01:03 PM CDT] #AAA19E #N784YX #E75L #RPA3527 #YX3527 #autopilot #ADSB #ADSBbot