N23721

B737BOEING Boeing 737-700

UNITED AIRLINES INC· ICAO24 a22539· last seen 1d ago

N23721 is a BOEING Boeing 737-700 operated by UNITED AIRLINES INC. SkyMeter has tracked 288 flights totalling 533 hours of airtime via ADS-B across 112 callsigns. The most frequent segment is KDFW to KIAH. Service window in our records spans 47 days. Of those flights, 16 (5.6%) carry at least one detected incident — go-around, unstable approach, stall warning, or runway excursion.

✈
FLIGHTS
288
all time
⏱
FLOWN HOURS
533
tracked time
📍
AIRPORTS VISITED
43
unique
📡
CALLSIGNS
112
91 routes
📅
SERVICE PERIOD
04/17/2026 → 06/03/2026
first → last
⚠
INCIDENT RATE
5.6%
16 flagged

Top routes

By flight count

10
KDFW → KIAH
4
MMMY → KIAH
4
KDCA → KIAH
4
KORD → KDCA
3
KCMH → KIAH
3
KIAD → KRDU
3
KIAH → KCMH
3
KIAH → KDFW
3
KRDU → KIAD
3
KIAH → KPIT
2

Flight numbers

Most-flown by this airframe

10
UAL722 4
UAL480 4
UAL2346 3
UAL1725 3
UAL1861 2
UAL1207 2
UAL1853 2
UAL2652 2
UAL1228 2
UAL1860 2

Aircraft specifications

BOEING Boeing 737-700

Engines
Twin Jet
Vref (approach)
130 kt
MTOW
154,500 lb
Wingspan
117 ft
Length
110 ft
Wake category
Medium

Recent flights

Newest 50 operations of N23721

50
UAL480BOEING Boeing 737-700
→
06/03/2026
1h 24m
No alerts
Replay Analysis
UAL722BOEING Boeing 737-700
→
06/03/2026
2h 12m
△ Unstable
Replay Analysis
UAL480BOEING Boeing 737-700
→
06/03/2026
2h 9m
No alerts
Replay Analysis
UAL722BOEING Boeing 737-700
→
06/02/2026
2h 13m
△ Unstable
Replay Analysis
UAL2037BOEING Boeing 737-700
→
06/02/2026
1h 13m
No alerts
Replay Analysis
UAL1106BOEING Boeing 737-700
→
06/02/2026
1h 22m
No alerts
Replay Analysis
UAL480BOEING Boeing 737-700
→
06/01/2026
2h 30m
No alerts
Replay Analysis
UAL722BOEING Boeing 737-700
→
06/01/2026
2h 5m
No alerts
Replay Analysis
UAL2037BOEING Boeing 737-700
→
06/01/2026
1h 15m
No alerts
Replay Analysis
UAL1106BOEING Boeing 737-700
→
06/01/2026
1h 19m
No alerts
Replay Analysis
UAL480BOEING Boeing 737-700
→
05/31/2026
2h 26m
No alerts
Replay Analysis
UAL722BOEING Boeing 737-700
→
05/31/2026
2h 5m
No alerts
Replay Analysis
UAL1507BOEING Boeing 737-700
→
05/31/2026
2h 36m
No alerts
Replay Analysis
UAL2612BOEING Boeing 737-700
→
05/31/2026
2h 18m
No alerts
Replay Analysis
UAL1611BOEING Boeing 737-700
→
05/29/2026
1h 14m
No alerts
Replay Analysis
UAL1558BOEING Boeing 737-700
→
05/29/2026
54m
No alerts
Replay Analysis
UAL1228BOEING Boeing 737-700
→
05/29/2026
49m
No alerts
Replay Analysis
UAL1144BOEING Boeing 737-700
→
05/29/2026
1h 58m
No alerts
Replay Analysis
UAL1207BOEING Boeing 737-700
→
05/29/2026
2h 10m
No alerts
Replay Analysis
UAL1878BOEING Boeing 737-700
→
05/29/2026
1h 11m
No alerts
Replay Analysis
UAL1115BOEING Boeing 737-700
→
05/28/2026
1h 22m
No alerts
Replay Analysis
UAL661BOEING Boeing 737-700
→
05/28/2026
5h 16m
No alerts
Replay Analysis
UAL308BOEING Boeing 737-700
→
05/28/2026
3h 56m
No alerts
Replay Analysis
UAL1513BOEING Boeing 737-700
→
05/26/2026
2h 34m
No alerts
Replay Analysis
UAL1050BOEING Boeing 737-700
→
05/26/2026
2h 41m
No alerts
Replay Analysis
UAL1343BOEING Boeing 737-700
→
05/26/2026
2h 26m
No alerts
Replay Analysis
UAL2016BOEING Boeing 737-700
→
05/26/2026
2h 52m
No alerts
Replay Analysis
UAL1558BOEING Boeing 737-700
→
05/25/2026
1h 37m
No alerts
Replay Analysis
UAL1228BOEING Boeing 737-700
→
05/25/2026
1h 5m
No alerts
Replay Analysis
UAL1144BOEING Boeing 737-700
→
05/25/2026
1h 49m
! Stall
Replay Analysis
UAL1207BOEING Boeing 737-700
→
05/25/2026
2h 12m
△ Unstable
Replay Analysis
UAL1513BOEING Boeing 737-700
→
05/24/2026
7h 0m
No alerts
Replay Analysis
UAL458BOEING Boeing 737-700
→
05/24/2026
1h 6m
No alerts
Replay Analysis
UAL1258BOEING Boeing 737-700
→
05/23/2026
7h 23m
No alerts
Replay Analysis
UAL2684BOEING Boeing 737-700
→
05/23/2026
2h 5m
No alerts
Replay Analysis
UAL1557BOEING Boeing 737-700
→
05/22/2026
6m
No alerts
Replay Analysis
UAL2824BOEING Boeing 737-700
→
05/22/2026
1h 50m
No alerts
Replay Analysis
UAL2825BOEING Boeing 737-700
→
05/22/2026
35m
No alerts
Replay Analysis
UAL2825BOEING Boeing 737-700
→
05/21/2026
1h 39m
No alerts
Replay Analysis
UAL2825BOEING Boeing 737-700
→
05/21/2026
1h 4m
No alerts
Replay Analysis
UAL2825BOEING Boeing 737-700
→
05/21/2026
19m
No alerts
Replay Analysis
UAL2825BOEING Boeing 737-700
→
05/21/2026
1h 59m
No alerts
Replay Analysis
UAL2499BOEING Boeing 737-700
→
05/21/2026
2h 33m
No alerts
Replay Analysis
UAL307BOEING Boeing 737-700
→
05/21/2026
2h 29m
No alerts
Replay Analysis
UAL1803BOEING Boeing 737-700
→
05/21/2026
1h 24m
No alerts
Replay Analysis
UAL1376BOEING Boeing 737-700
→
05/21/2026
2h 18m
No alerts
Replay Analysis
UAL2178BOEING Boeing 737-700
→
05/20/2026
4h 15m
No alerts
Replay Analysis
UAL1089BOEING Boeing 737-700
→
05/20/2026
1h 39m
No alerts
Replay Analysis
UAL1024BOEING Boeing 737-700
→
05/20/2026
2h 1m
No alerts
Replay Analysis
UAL1609BOEING Boeing 737-700
→
05/20/2026
1h 22m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution