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UAL2173

BOI → COS · Boeing 737-900 · United Airlines

Flight

Status
Completed
Arrival confirmed via
ADS-B (ground reading)
Departure
Boise Air Terminal/Gowen Field (BOI) — Boise, United States
Departed
2026-09-25 20:51 UTC
Arrival
City of Colorado Springs Municipal Airport (COS) — Colorado Springs, United States
Distance flown
2048 km
Straight-line distance
1098 km
Approach distance
52 km

Aircraft

Registration
N37427
Type
Boeing 737-900
Seats
179 total (117 Economy, 42 Economy Plus, 20 First)

Altitude & speed

Max altitude
35,000 ft
Max ground speed
486 kt
Tracked
3h 21m · 2,041 km
Altitude (ft, max 35,000)
018,90037,8000m30m1h 0m1h 30m2h 0m2h 30m3h 0m
Ground speed (kt, max 486)
02625250m30m1h 0m1h 30m2h 0m2h 30m3h 0m
Altitude (ft, max 35,000)
018,90037,8000m1h 0m2h 0m3h 0m
Ground speed (kt, max 486)
02625250m1h 0m2h 0m3h 0m

From the ADS-B positions we received; time since the first fix. A dashed stretch is a gap in reception, bridged by a straight line.

Route map

Airline

United Airlines (UAL)

Latest flights

DepartedFlightRouteRegAircraftStatusDistance
2026-10-03 02:10 UTC UAL2173 DEN → HDN
Denver → Hayden
 N27246 Boeing 737-800 Incomplete (signal lost) 229 km
2026-10-02 21:43 UTC UAL2173 BOI → DEN
Boise → Denver
 N33262 Boeing 737-800 Completed 1105 km
2026-10-02 01:57 UTC UAL2173 DEN → HDN
Denver → Hayden
 N37252 Boeing 737-800 Incomplete (signal lost) 245 km
2026-10-01 21:03 UTC UAL2173 BOI → DEN
Boise → Denver
 N37468 Boeing 737-900 Completed 1222 km
2026-10-01 01:22 UTC UAL2173 DEN → HDN
Denver → Hayden
 N76514 Boeing 737-800 Incomplete (signal lost) ~270 km est. (162 km recorded)
2026-09-30 20:46 UTC UAL2173 BOI → DEN
Boise → Denver
 N37255 Boeing 737-800 Completed 1191 km
2026-09-30 03:16 UTC UAL2173 DEN → HDN
Denver → Hayden
 N76529 Boeing 737-800 Completed (landing presumed) 243 km
2026-09-29 20:52 UTC UAL2173 BOI → DEN
Boise → Denver
 N37470 Boeing 737-900 Completed 1217 km
2026-09-29 01:39 UTC UAL2173 DEN → HDN
Denver → Hayden
 N33266 Boeing 737-800 Incomplete (signal lost) 213 km
2026-09-28 21:00 UTC UAL2173 BOI → DEN
Boise → Denver
 N69818 Boeing 737-900 Completed 1113 km
2026-09-28 17:35 UTC UAL2173 DEN → BOI
Denver → Boise
 N69818 Boeing 737-900 Completed 1068 km
2026-09-28 03:13 UTC UAL2173 DEN → HDN
Denver → Hayden
 N87512 Boeing 737-800 Incomplete (signal lost) 242 km
2026-09-27 23:34 UTC UAL2173 BOI → DEN
Boise → Denver
 N36469 Boeing 737-900 Completed 1424 km
2026-09-27 01:54 UTC UAL2173 DEN → HDN
Denver → Hayden
 N37267 Boeing 737-800 Incomplete (signal lost) ~280 km est. (179 km recorded)
2026-09-26 20:55 UTC UAL2173 BOI → DEN
Boise → Denver
 N39418 Boeing 737-900 Completed 1106 km
2026-09-26 03:39 UTC UAL2173 COS → DEN
Colorado Springs → Denver
 N37427 Boeing 737-900 Completed 210 km
2026-09-25 20:51 UTC UAL2173 BOI → COS
Boise → Colorado Springs
 N37427 Boeing 737-900 Completed 2048 km
2026-09-25 01:39 UTC UAL2173 DEN → HDN
Denver → Hayden
 N27246 Boeing 737-800 Incomplete (signal lost) 228 km
2026-09-24 20:49 UTC UAL2173 BOI → DEN
Boise → Denver
 N39418 Boeing 737-900 Completed 1172 km
2026-09-24 01:30 UTC UAL2173 DEN → HDN
Denver → Hayden
 N835UA Airbus A319 Completed (landing presumed) 238 km
2026-09-23 20:32 UTC UAL2173 BOI → DEN
Boise → Denver
 N64844 Boeing 737-900 Completed 1082 km
2026-09-23 01:52 UTC UAL2173 DEN → HDN
Denver → Hayden
 N811UA Airbus A319 Completed (landing presumed) 236 km
2026-09-22 20:55 UTC UAL2173 BOI → DEN
Boise → Denver
 N68821 Boeing 737-900 Completed 1139 km
2026-09-22 01:30 UTC UAL2173 DEN → HDN
Denver → Hayden
 N897UA Airbus A319 Completed (landing presumed) 232 km
2026-09-21 20:33 UTC UAL2173 BOI → DEN
Boise → Denver
 N57439 Boeing 737-900 Completed 1196 km
2026-09-21 02:20 UTC UAL2173 DEN → HDN
Denver → Hayden
 N835UA Airbus A319 Incomplete (signal lost) 454 km
2026-09-20 20:48 UTC UAL2173 BOI → DEN
Boise → Denver
 N81449 Boeing 737-900 Completed 1171 km
2026-09-20 03:49 UTC UAL2173 DEN → HDN
Denver → Hayden
 N853UA Airbus A319 Completed (landing presumed) 235 km
2026-09-19 20:45 UTC UAL2173 BOI → DEN
Boise → Denver
 N61898 Boeing 737-900 Completed 1236 km
2026-09-19 01:56 UTC UAL2173 RAP → DEN
Rapid City → Denver
 N36469 Boeing 737-900 Completed 791 km
2026-09-18 21:06 UTC UAL2173 BOI → RAP
Boise → Rapid City
 N36469 Boeing 737-900 Completed 2284 km
2026-09-18 02:48 UTC UAL2173 DEN → HDN
Denver → Hayden
 N844UA Airbus A319 Incomplete (signal lost) ~277 km est. (175 km recorded)
2026-09-17 21:15 UTC UAL2173 BOI → DEN
Boise → Denver
 N68891 Boeing 737-900 Completed 1267 km
2026-09-17 01:36 UTC UAL2173 DEN → HDN
Denver → Hayden
 N889UA Airbus A319 Completed (landing presumed) 230 km
2026-09-16 20:48 UTC UAL2173 BOI → DEN
Boise → Denver
 N37466 Boeing 737-900 Completed 1253 km
2026-09-16 01:42 UTC UAL2173 DEN → HDN
Denver → Hayden
 N892UA Airbus A319 Incomplete (signal lost) 234 km
2026-09-15 20:32 UTC UAL2173 BOI → DEN
Boise → Denver
 N68822 Boeing 737-900 Completed 1181 km
2026-09-15 03:18 UTC UAL2173 DEN → HDN
Denver → Hayden
 N820UA Airbus A319 Incomplete (signal lost) 228 km
2026-09-14 20:53 UTC UAL2173 BOI → DEN
Boise → Denver
 N62884 Boeing 737-900 Completed 1257 km
2026-09-14 01:32 UTC UAL2173 DEN → HDN
Denver → Hayden
 N895UA Airbus A319 Incomplete (signal lost) 359 km
2026-09-13 20:44 UTC UAL2173 BOI → DEN
Boise → Denver
 N37427 Boeing 737-900 Completed 1249 km
2026-09-13 02:26 UTC UAL2173 DEN → HDN
Denver → Hayden
 N4888U Airbus A319 Incomplete (signal lost) 227 km
2026-09-12 20:51 UTC UAL2173 BOI → DEN
Boise → Denver
 N62889 Boeing 737-900 Completed 1133 km
2026-09-12 01:24 UTC UAL2173 DEN → HDN
Denver → Hayden
 N841UA Airbus A319 Incomplete (signal lost) 236 km
2026-09-11 20:39 UTC UAL2173 BOI → DEN
Boise → Denver
 N62883 Boeing 737-900 Completed 1281 km
2026-09-11 01:51 UTC UAL2173 DEN → HDN
Denver → Hayden
 N835UA Airbus A319 Incomplete (signal lost) 224 km
2026-09-10 20:37 UTC UAL2173 BOI → DEN
Boise → Denver
 N28478 Boeing 737-900 Completed 1146 km
2026-09-10 01:52 UTC UAL2173 DEN → HDN
Denver → Hayden
 N851UA Airbus A319 Completed (landing presumed) 229 km
2026-09-09 20:49 UTC UAL2173 BOI → DEN
Boise → Denver
 N61886 Boeing 737-900 Completed 1207 km
2026-09-08 01:33 UTC UAL2173 DEN → HDN
Denver → Hayden
 N814UA Airbus A319 Incomplete (signal lost) 236 km

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