N21723

B737BOEING Boeing 737-700

UNITED AIRLINES INC· ICAO24 a1d63d· last seen 2d ago

N21723 is a BOEING Boeing 737-700 operated by UNITED AIRLINES INC. SkyMeter has tracked 434 flights totalling 838 hours of airtime via ADS-B across 172 callsigns. The most frequent segment is KORD to KDCA. Service window in our records spans 61 days. Of those flights, 16 (3.7%) carry at least one detected incident — go-around, unstable approach, stall warning, or runway excursion.

✈
FLIGHTS
434
all time
⏱
FLOWN HOURS
838
tracked time
📍
AIRPORTS VISITED
49
unique
📡
CALLSIGNS
172
138 routes
📅
SERVICE PERIOD
04/03/2026 → 06/03/2026
first → last
⚠
INCIDENT RATE
3.7%
16 flagged

Top routes

By flight count

10
KORD → KDCA
6
KORD → KBNA
5
KBNA → KORD
4
KDCA → KORD
4
KDFW → KIAH
4
CYEG → KIAH
3
KIAH → KATL
3
KRNO → KORD
3
KORD → KATL
3
KRDU → KORD
2

Flight numbers

Most-flown by this airframe

10
UAL1288 6
None 4
UAL1884 3
UAL1478 3
UAL241 3
UAL1673 3
UAL1858 2
UAL1853 2
UAL744 2
UAL1371 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 N21723

50
UAL2081BOEING Boeing 737-700
→
06/03/2026
1h 33m
No alerts
Replay Analysis
UAL358BOEING Boeing 737-700
→
06/03/2026
2h 45m
No alerts
Replay Analysis
UAL528BOEING Boeing 737-700
→
06/03/2026
2h 8m
No alerts
Replay Analysis
UAL1793BOEING Boeing 737-700
→
06/03/2026
1h 58m
No alerts
Replay Analysis
UAL1369BOEING Boeing 737-700
→
06/03/2026
1h 38m
No alerts
Replay Analysis
UAL654BOEING Boeing 737-700
→
06/02/2026
1h 51m
No alerts
Replay Analysis
UAL752BOEING Boeing 737-700
→
06/02/2026
1h 49m
No alerts
Replay Analysis
UAL1363BOEING Boeing 737-700
→
06/02/2026
1h 58m
No alerts
Replay Analysis
UAL1890BOEING Boeing 737-700
→
06/02/2026
1h 16m
No alerts
Replay Analysis
UAL2186BOEING Boeing 737-700
→
06/02/2026
4h 51m
No alerts
Replay Analysis
UAL1690BOEING Boeing 737-700
→
06/02/2026
3h 17m
No alerts
Replay Analysis
UAL1690BOEING Boeing 737-700
→
06/01/2026
2h 30m
No alerts
Replay Analysis
UAL1690BOEING Boeing 737-700
→
06/01/2026
5h 48m
No alerts
Replay Analysis
UAL2174BOEING Boeing 737-700
→
06/01/2026
1h 39m
No alerts
Replay Analysis
UAL1616BOEING Boeing 737-700
→
06/01/2026
2h 10m
No alerts
Replay Analysis
UAL2468BOEING Boeing 737-700
→
06/01/2026
1h 6m
No alerts
Replay Analysis
UAL1611BOEING Boeing 737-700
→
06/01/2026
1h 11m
No alerts
Replay Analysis
UAL1878BOEING Boeing 737-700
→
06/01/2026
20m
No alerts
Replay Analysis
UAL1878BOEING Boeing 737-700
→
05/31/2026
44m
No alerts
Replay Analysis
UAL1878BOEING Boeing 737-700
→
05/31/2026
1h 4m
No alerts
Replay Analysis
UAL1115BOEING Boeing 737-700
→
05/31/2026
1h 11m
No alerts
Replay Analysis
UAL2612BOEING Boeing 737-700
→
05/31/2026
2h 27m
No alerts
Replay Analysis
UAL1226BOEING Boeing 737-700
→
05/31/2026
2h 54m
No alerts
Replay Analysis
UAL458BOEING Boeing 737-700
→
05/31/2026
59m
No alerts
Replay Analysis
UAL1905BOEING Boeing 737-700
→
05/29/2026
23m
No alerts
Replay Analysis
UAL1862BOEING Boeing 737-700
→
05/29/2026
1h 43m
No alerts
Replay Analysis
UAL2770BOEING Boeing 737-700
→
05/29/2026
3h 46m
No alerts
Replay Analysis
UAL1884BOEING Boeing 737-700
→
05/28/2026
1h 39m
No alerts
Replay Analysis
UAL2142BOEING Boeing 737-700
→
05/28/2026
1h 3m
No alerts
Replay Analysis
UAL592BOEING Boeing 737-700
→
05/28/2026
2h 0m
No alerts
Replay Analysis
UAL2795BOEING Boeing 737-700
→
05/28/2026
1h 47m
No alerts
Replay Analysis
UAL2063BOEING Boeing 737-700
→
05/28/2026
58m
No alerts
Replay Analysis
UAL654KBOEING Boeing 737-700
→
05/28/2026
34m
No alerts
Replay Analysis
UAL1046BOEING Boeing 737-700
→
05/26/2026
26m
No alerts
Replay Analysis
UAL356BOEING Boeing 737-700
→
05/26/2026
1h 42m
No alerts
Replay Analysis
UAL1215BOEING Boeing 737-700
→
05/26/2026
1h 51m
No alerts
Replay Analysis
UAL2622BOEING Boeing 737-700
→
05/26/2026
2h 6m
No alerts
Replay Analysis
UAL2800BOEING Boeing 737-700
→
05/26/2026
10m
No alerts
Replay Analysis
UAL2800BOEING Boeing 737-700
→
05/26/2026
57m
No alerts
Replay Analysis
UAL2800BOEING Boeing 737-700
→
05/25/2026
1h 4m
No alerts
Replay Analysis
UAL2800BOEING Boeing 737-700
→
05/25/2026
6m
No alerts
Replay Analysis
UAL2207BOEING Boeing 737-700
→
05/25/2026
59m
No alerts
Replay Analysis
UAL511BOEING Boeing 737-700
→
05/25/2026
1h 47m
No alerts
Replay Analysis
UAL490BOEING Boeing 737-700
→
05/25/2026
1h 36m
△ Unstable
Replay Analysis
NoneBOEING Boeing 737-700
→
05/25/2026
7m
No alerts
Replay Analysis
UAL1486BOEING Boeing 737-700
→
05/25/2026
44m
No alerts
Replay Analysis
UAL2071BOEING Boeing 737-700
→
05/25/2026
45m
No alerts
Replay Analysis
UAL2072BOEING Boeing 737-700
→
05/25/2026
1h 26m
No alerts
Replay Analysis
UAL2072BOEING Boeing 737-700
→
05/24/2026
1h 8m
No alerts
Replay Analysis
UAL1955BOEING Boeing 737-700
→
05/24/2026
5m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution