UAL423 is operated by UNITED AIRLINES INC between Eleftherios Venizelos International Airport (LGAV) and Chicago O'Hare International Airport (KORD). The flight is most often flown by a BOEING Boeing 787-10 Dreamliner. Typical block time is 4h 4m. SkyMeter has observed 70 legs of this flight number via ADS-B.

✈
FLIGHTS
70
last 90 days
⏱
AVG DURATION
4h 4m
tracked time
📅
SERVICE PERIOD
04/14/2026 → 06/03/2026
first → last seen
🗺
ROUTES / TYPES
3 / 2
city pairs · airframes
⚠
INCIDENT RATE
1.4%
1 flagged

Routes flown

By count · last 90 days

1
LGAV → KORD
10
avg 10h 45m · Eleftherios Venizelos → Chicago O'Hare

Aircraft types

Equipment used on this number

2
B78X BOEING Boeing 787-10 Dreamliner
47
B788 BOEING Boeing 787-8 BBJ/Dreamliner
29

Safety profile

Flagged flights · last 90 days

Go-arounds
0
Unstable approach
0
Rejected TO
0
Stall warnings
0
Overspeeds
1
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 UAL423

30
N12004BOEING Boeing 787-10 Dreamliner
→
06/03/2026
2h 15m
No alerts
Replay Analysis
N12004BOEING Boeing 787-10 Dreamliner
→
06/03/2026
3h 52m
No alerts
Replay Analysis
N12003BOEING Boeing 787-10 Dreamliner
→
06/02/2026
2h 13m
No alerts
Replay Analysis
N12003BOEING Boeing 787-10 Dreamliner
→
06/02/2026
3h 54m
No alerts
Replay Analysis
N12012BOEING Boeing 787-10 Dreamliner
→
06/01/2026
1h 38m
No alerts
Replay Analysis
N12012BOEING Boeing 787-10 Dreamliner
→
06/01/2026
4h 9m
No alerts
Replay Analysis
N12005BOEING Boeing 787-10 Dreamliner
→
05/31/2026
1h 1m
No alerts
Replay Analysis
N12005BOEING Boeing 787-10 Dreamliner
→
05/31/2026
4h 7m
No alerts
Replay Analysis
N16008BOEING Boeing 787-10 Dreamliner
→
05/29/2026
1h 45m
No alerts
Replay Analysis
N16008BOEING Boeing 787-10 Dreamliner
→
05/29/2026
3h 55m
No alerts
Replay Analysis
N13013BOEING Boeing 787-10 Dreamliner
→
05/28/2026
2h 19m
No alerts
Replay Analysis
N13013BOEING Boeing 787-10 Dreamliner
→
05/28/2026
4h 8m
No alerts
Replay Analysis
N12003BOEING Boeing 787-10 Dreamliner
→
05/27/2026
2h 36m
No alerts
Replay Analysis
N12003BOEING Boeing 787-10 Dreamliner
→
05/27/2026
3h 56m
No alerts
Replay Analysis
N12021BOEING Boeing 787-10 Dreamliner
→
05/26/2026
10h 38m
No alerts
Replay Analysis
N13018BOEING Boeing 787-10 Dreamliner
→
05/25/2026
10h 44m
No alerts
Replay Analysis
N14001BOEING Boeing 787-10 Dreamliner
→
05/24/2026
2h 49m
No alerts
Replay Analysis
N14001BOEING Boeing 787-10 Dreamliner
→
05/24/2026
3h 48m
No alerts
Replay Analysis
N12020BOEING Boeing 787-10 Dreamliner
→
05/23/2026
2h 49m
No alerts
Replay Analysis
N12020BOEING Boeing 787-10 Dreamliner
→
05/23/2026
4h 3m
No alerts
Replay Analysis
N12006BOEING Boeing 787-10 Dreamliner
→
05/21/2026
1h 22m
No alerts
Replay Analysis
N12006BOEING Boeing 787-10 Dreamliner
→
05/21/2026
4h 21m
No alerts
Replay Analysis
N12010BOEING Boeing 787-10 Dreamliner
→
05/20/2026
1h 31m
No alerts
Replay Analysis
N12010BOEING Boeing 787-10 Dreamliner
→
05/20/2026
3h 41m
No alerts
Replay Analysis
N17002BOEING Boeing 787-10 Dreamliner
→
05/18/2026
2h 51m
No alerts
Replay Analysis
N17002BOEING Boeing 787-10 Dreamliner
→
05/18/2026
3h 54m
No alerts
Replay Analysis
N14001BOEING Boeing 787-10 Dreamliner
→
05/17/2026
1h 44m
No alerts
Replay Analysis
N14001BOEING Boeing 787-10 Dreamliner
→
05/17/2026
3h 56m
No alerts
Replay Analysis
N17017BOEING Boeing 787-10 Dreamliner
→
05/16/2026
1h 15m
No alerts
Replay Analysis
N17017BOEING Boeing 787-10 Dreamliner
→
05/16/2026
5h 9m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window