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
6
5
4
4
4
3
3
3
3
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
05/25/2026
1h 36m
△ Unstable
© SkyMeter · All flight data subject to ODbL attribution