UAL51 is operated by UNITED AIRLINES INC between Newark Liberty International Airport (KEWR) and Adolfo Suárez Madrid–Barajas Airport (LEMD). The flight is most often flown by a BOEING Boeing 767-400. Typical block time is 6h 20m. SkyMeter has observed 96 legs of this flight number via ADS-B.

✈
FLIGHTS
96
last 90 days
⏱
AVG DURATION
6h 20m
tracked time
📅
SERVICE PERIOD
5/27/2025 → 8/10/2026
first → last seen
🗺
ROUTES / TYPES
4 / 1
city pairs · airframes
⚠
INCIDENT RATE
0.0%
0 flagged

Routes flown

By count · last 90 days

1
KEWR → LEMD
76
avg 7h 4m · Newark Liberty → Adolfo Suárez Madrid–Barajas

Aircraft types

Equipment used on this number

1
B764 BOEING Boeing 767-400
165

Safety profile

Flagged flights · last 90 days

Go-arounds
0
Unstable approach
0
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 UAL51

30
N76064BOEING Boeing 767-400
→
8/11/2026
6h 9m
No alerts
Replay Analysis
N76064BOEING Boeing 767-400
→
8/10/2026
40m
No alerts
Replay Analysis
N76064BOEING Boeing 767-400
→
8/10/2026
6h 49m
No alerts
Replay Analysis
N76055BOEING Boeing 767-400
→
8/10/2026
1h 20m
No alerts
Replay Analysis
N59053BOEING Boeing 767-400
→
8/9/2026
7h 34m
No alerts
Replay Analysis
N76062BOEING Boeing 767-400
→
8/8/2026
7h 34m
No alerts
Replay Analysis
N69059BOEING Boeing 767-400
→
8/7/2026
7h 37m
No alerts
Replay Analysis
N66056BOEING Boeing 767-400
→
8/6/2026
7h 39m
No alerts
Replay Analysis
N59053BOEING Boeing 767-400
→
8/5/2026
6h 58m
No alerts
Replay Analysis
N66056BOEING Boeing 767-400
→
8/4/2026
6h 12m
No alerts
Replay Analysis
N66056BOEING Boeing 767-400
→
8/3/2026
33m
No alerts
Replay Analysis
N66056BOEING Boeing 767-400
→
8/3/2026
6h 46m
No alerts
Replay Analysis
N76055BOEING Boeing 767-400
→
8/3/2026
6h 20m
No alerts
Replay Analysis
N76055BOEING Boeing 767-400
→
8/2/2026
44m
No alerts
Replay Analysis
N76055BOEING Boeing 767-400
→
8/2/2026
7h 5m
No alerts
Replay Analysis
N76064BOEING Boeing 767-400
→
8/2/2026
1h 12m
No alerts
Replay Analysis
N78060BOEING Boeing 767-400
→
8/1/2026
6h 58m
No alerts
Replay Analysis
N59053BOEING Boeing 767-400
→
7/31/2026
7h 7m
No alerts
Replay Analysis
N76064BOEING Boeing 767-400
→
7/30/2026
7h 34m
No alerts
Replay Analysis
N66056BOEING Boeing 767-400
→
7/28/2026
7h 8m
No alerts
Replay Analysis
N76064BOEING Boeing 767-400
→
7/27/2026
6h 41m
No alerts
Replay Analysis
N76064BOEING Boeing 767-400
→
7/26/2026
40m
No alerts
Replay Analysis
N69059BOEING Boeing 767-400
→
7/26/2026
6h 46m
No alerts
Replay Analysis
N69059BOEING Boeing 767-400
→
7/25/2026
44m
No alerts
Replay Analysis
N76054BOEING Boeing 767-400
→
7/25/2026
6h 57m
No alerts
Replay Analysis
N76054BOEING Boeing 767-400
→
7/24/2026
29m
No alerts
Replay Analysis
N59053BOEING Boeing 767-400
→
7/24/2026
6h 41m
No alerts
Replay Analysis
N59053BOEING Boeing 767-400
→
7/23/2026
39m
No alerts
Replay Analysis
N59053BOEING Boeing 767-400
→
7/23/2026
7h 21m
No alerts
Replay Analysis
N76055BOEING Boeing 767-400
→
7/23/2026
6h 29m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window