UAL231 is operated by UNITED AIRLINES INC between Glasgow International Airport (EGPF) and Newark Liberty International Airport (KEWR). The flight is most often flown by a BOEING Boeing 737 MAX 8. Typical block time is 4h 9m. SkyMeter has observed 39 legs of this flight number via ADS-B.

✈
FLIGHTS
39
last 90 days
⏱
AVG DURATION
4h 9m
tracked time
📅
SERVICE PERIOD
04/16/2026 → 06/03/2026
first → last seen
🗺
ROUTES / TYPES
5 / 2
city pairs · airframes
⚠
INCIDENT RATE
2.6%
1 flagged

Routes flown

By count · last 90 days

3
EGPF → KEWR
13
avg 7h 10m · Glasgow → Newark Liberty
CT35 → KDEN
9
avg 4h 12m · Hamilton Standard Heliport → Denver
KBDL → KDEN
3
avg 4h 19m · Bradley → Denver

Aircraft types

Equipment used on this number

2
B38M BOEING Boeing 737 MAX 8
27
B738 BOEING Boeing 737-800
12

Safety profile

Flagged flights · last 90 days

Go-arounds
0
Unstable approach
1
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 UAL231

30
N17279BOEING Boeing 737 MAX 8
→
06/03/2026
6h 52m
No alerts
Replay Analysis
N27270BOEING Boeing 737 MAX 8
→
06/02/2026
1h 44m
No alerts
Replay Analysis
N27270BOEING Boeing 737 MAX 8
→
06/02/2026
32m
No alerts
Replay Analysis
N27274BOEING Boeing 737 MAX 8
→
06/01/2026
1h 54m
No alerts
Replay Analysis
N27274BOEING Boeing 737 MAX 8
→
06/01/2026
36m
No alerts
Replay Analysis
N17279BOEING Boeing 737 MAX 8
→
05/31/2026
6h 55m
△ Unstable
Replay Analysis
N47291BOEING Boeing 737 MAX 8
→
05/29/2026
1h 52m
No alerts
Replay Analysis
N47291BOEING Boeing 737 MAX 8
→
05/29/2026
54m
No alerts
Replay Analysis
N37324BOEING Boeing 737 MAX 8
→
05/28/2026
1h 49m
No alerts
Replay Analysis
N37324BOEING Boeing 737 MAX 8
→
05/28/2026
58m
No alerts
Replay Analysis
N37305BOEING Boeing 737 MAX 8
→
05/26/2026
7h 15m
No alerts
Replay Analysis
N37305BOEING Boeing 737 MAX 8
→
05/25/2026
7h 23m
No alerts
Replay Analysis
N47288BOEING Boeing 737 MAX 8
→
05/24/2026
7h 8m
No alerts
Replay Analysis
N17328BOEING Boeing 737 MAX 8
→
05/23/2026
1h 54m
No alerts
Replay Analysis
N17328BOEING Boeing 737 MAX 8
→
05/23/2026
37m
No alerts
Replay Analysis
N37278BOEING Boeing 737 MAX 8
→
05/21/2026
1h 54m
No alerts
Replay Analysis
N37278BOEING Boeing 737 MAX 8
→
05/21/2026
35m
No alerts
Replay Analysis
N37324BOEING Boeing 737 MAX 8
→
05/20/2026
7h 8m
No alerts
Replay Analysis
N17327BOEING Boeing 737 MAX 8
→
05/18/2026
6h 58m
No alerts
Replay Analysis
N47282BOEING Boeing 737 MAX 8
→
05/17/2026
7h 7m
No alerts
Replay Analysis
N37325BOEING Boeing 737 MAX 8
→
05/16/2026
7h 8m
No alerts
Replay Analysis
N17320BOEING Boeing 737 MAX 8
→
05/15/2026
6h 57m
No alerts
Replay Analysis
N27270BOEING Boeing 737 MAX 8
→
05/14/2026
2h 3m
No alerts
Replay Analysis
N27270BOEING Boeing 737 MAX 8
→
05/14/2026
28m
No alerts
Replay Analysis
N27283BOEING Boeing 737 MAX 8
→
05/13/2026
7h 14m
No alerts
Replay Analysis
N57299BOEING Boeing 737 MAX 8
→
05/11/2026
7h 44m
No alerts
Replay Analysis
N37318BOEING Boeing 737 MAX 8
→
05/10/2026
7h 24m
No alerts
Replay Analysis
N87531BOEING Boeing 737-800
→
04/28/2026
4h 14m
No alerts
Replay Analysis
N17244BOEING Boeing 737-800
→
04/27/2026
4h 20m
No alerts
Replay Analysis
N77295BOEING Boeing 737-800
→
04/26/2026
4h 17m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window