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

🇺🇸 N729NK - Airbus A321 271NXSL - Spirit Airlines NKS1633/NK1633, Chicago O'Hare (ORD) to Dallas-Fort Worth (DFW) - 4.0 mi away @ 36075 ft, heading SW at 485 mph. Spotted 2x before! [12:15:21 PM CDT] #A9C631 #N729NK #A21N #SPIRIT_WINGS #NKS1633 #NK1633 #ADSB #ADSBbot

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

🇺🇸 N729NK - Airbus A321 271NXSL - Spirit Airlines NKS824/NK824, George Bush Intcntl/Houston (IAH) to Detroit Metro Wayne County (DTW) - 4.5 mi away @ 36100 ft, heading NE at 575 mph. Spotted once before! [06:39:34 PM CDT] #A9C631 #N729NK #A21N #SPIRIT_WINGS #NKS824 #NK824 #ADSB #ADSBbot

Planefence ICAO: A9C631
Flt: NKS831 SPIRITAIRLINES DTW - LGA
First seen: 2025-04-14 19:51:22 EDT
Min Alt: 3450 ft MSL
Min Dist: 0.42 mi
adsb planefence by kx1t - adsbexchange - planefence

Planefence ICAO: A9C631
Flt: NKS3777 SPIRITAIRLINES IND - MCO
First seen: 2025-04-01 19:41:21 EDT
Min Alt: 3250 ft MSL
Min Dist: 0.0 mi
adsb planefence by kx1t - adsbexchange - planefence

Planefence ICAO: A9C631
Flt: NKS3777 SPIRITAIRLINES IND - MCO
First seen: 2025-04-01 19:41:57 EDT
Min Alt: 4300 ft MSL
Min Dist: 1.11 nm
adsb planefence by kx1t - airplanes.live - planefence

Planefence ICAO: A9C631
Flt: NKS828 SPIRITAIRLINES BNA - BOS
First seen: 2025-03-30 18:53:58 EDT
Min Alt: 2775 ft MSL
Min Dist: 1.82 nm
adsb planefence by kx1t - airplanes.live - planefence

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

🇺🇸 N729NK - Airbus A321 271NXSL - Spirit Airlines NKS922/NK922, Detroit Metro Wayne County (DTW) to Dallas-Fort Worth (DFW) - 4.6 mi away @ 37950 ft, heading SW at 390 mph. Spotted for first time! [04:35:33 PM CST] #A9C631 #N729NK #A21N #SPIRIT_WINGS #NKS922 #NK922 #ADSB #ADSBbot