UAL523 is operated by UNITED AIRLINES INC between Madeira Airport (LPMA) and Newark Liberty International Airport (KEWR). The flight is most often flown by a BOEING Boeing 737 MAX 8. Typical block time is 6h 52m. SkyMeter has observed 17 legs of this flight number via ADS-B.

✈
FLIGHTS
17
last 90 days
⏱
AVG DURATION
6h 52m
tracked time
📅
SERVICE PERIOD
05/27/2025 → 06/28/2026
first → last seen
🗺
ROUTES / TYPES
2 / 1
city pairs · airframes
⚠
INCIDENT RATE
11.8%
2 flagged

Routes flown

By count · last 90 days

1
LPMA → KEWR
15
avg 7h 14m · Madeira → Newark Liberty

Aircraft types

Equipment used on this number

1
B38M BOEING Boeing 737 MAX 8
19

Safety profile

Flagged flights · last 90 days

Go-arounds
0
Unstable approach
2
Rejected TO
0
Stall warnings
0
Overspeeds
0
Runway excursion
0
Counts represent flights with at least one occurrence of each flag, not the total event count. See /incidents for individual events.

Recent flights

Newest 30 operations of UAL523

30
N27290BOEING Boeing 737 MAX 8
→
06/28/2026
7h 14m
No alerts
Replay Analysis
N37313BOEING Boeing 737 MAX 8
→
06/26/2026
7h 48m
No alerts
Replay Analysis
N17300BOEING Boeing 737 MAX 8
→
06/24/2026
6h 49m
No alerts
Replay Analysis
N57286BOEING Boeing 737 MAX 8
→
06/21/2026
7h 8m
No alerts
Replay Analysis
N47288BOEING Boeing 737 MAX 8
→
06/19/2026
7h 32m
No alerts
Replay Analysis
N47345BOEING Boeing 737 MAX 8
→
06/17/2026
2h 9m
No alerts
Replay Analysis
N47345BOEING Boeing 737 MAX 8
→
06/17/2026
4h 34m
No alerts
Replay Analysis
N47345BOEING Boeing 737 MAX 8
→
06/17/2026
7h 22m
No alerts
Replay Analysis
N47280BOEING Boeing 737 MAX 8
→
06/14/2026
7h 3m
No alerts
Replay Analysis
N47293BOEING Boeing 737 MAX 8
→
06/12/2026
7h 21m
No alerts
Replay Analysis
N37278BOEING Boeing 737 MAX 8
→
06/07/2026
6h 51m
No alerts
Replay Analysis
N47345BOEING Boeing 737 MAX 8
→
06/05/2026
7h 9m
No alerts
Replay Analysis
N17314BOEING Boeing 737 MAX 8
→
06/03/2026
7h 11m
△ Unstable
Replay Analysis
N17326BOEING Boeing 737 MAX 8
→
05/31/2026
7h 19m
No alerts
Replay Analysis
N47280BOEING Boeing 737 MAX 8
→
05/29/2026
7h 32m
No alerts
Replay Analysis
N47280BOEING Boeing 737 MAX 8
→
05/24/2026
7h 8m
No alerts
Replay Analysis
N27273BOEING Boeing 737 MAX 8
→
05/22/2026
7h 5m
No alerts
Replay Analysis
N17285BOEING Boeing 737 MAX 8
→
05/20/2026
7h 4m
△ Unstable
Replay Analysis
N37325BOEING Boeing 737 MAX 8
→
05/17/2026
1h 15m
No alerts
Replay Analysis
N17320BOEING Boeing 737 MAX 8
→
09/24/2025
7h 37m
No alerts
Replay Analysis
N17296BOEING Boeing 737 MAX 8
→
09/21/2025
7h 15m
No alerts
Replay Analysis
N17311BOEING Boeing 737 MAX 8
→
09/19/2025
7h 30m
No alerts
Replay Analysis
N17317BOEING Boeing 737 MAX 8
→
09/17/2025
6h 59m
No alerts
Replay Analysis
N17306BOEING Boeing 737 MAX 8
→
09/14/2025
1h 5m
No alerts
Replay Analysis
N27273BOEING Boeing 737 MAX 8
→
09/12/2025
6h 38m
No alerts
Replay Analysis
N47280BOEING Boeing 737 MAX 8
→
09/10/2025
7h 6m
No alerts
Replay Analysis
N57299BOEING Boeing 737 MAX 8
→
09/07/2025
7h 22m
No alerts
Replay Analysis
N37313BOEING Boeing 737 MAX 8
→
09/03/2025
6h 58m
No alerts
Replay Analysis
N37324BOEING Boeing 737 MAX 8
→
08/31/2025
7h 8m
No alerts
Replay Analysis
N37324BOEING Boeing 737 MAX 8
→
08/29/2025
6h 54m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window