UAL643 is operated by UNITED AIRLINES INC between McCarran International Airport (KLAS) and San Francisco International Airport (KSFO). The flight is most often flown by a BOEING Boeing 737 MAX 8. Typical block time is 1h 54m. SkyMeter has observed 256 legs of this flight number via ADS-B.

✈
FLIGHTS
256
last 90 days
⏱
AVG DURATION
1h 54m
tracked time
📅
SERVICE PERIOD
5/27/2025 → 8/11/2026
first → last seen
🗺
ROUTES / TYPES
10 / 7
city pairs · airframes
⚠
INCIDENT RATE
0.0%
0 flagged

Routes flown

By count · last 90 days

5
KLAS → KSFO
79
avg 1h 24m · McCarran → San Francisco
KSNA → KIAH
78
avg 2h 53m · John Wayne Airport-Orange County → George Bush Intercontinental Houston
KSFO → KSNA
78
avg 1h 31m · San Francisco → John Wayne Airport-Orange County
KHAF → KSNA
7
avg 1h 29m · Half Moon Bay → John Wayne Airport-Orange County
US-0188 → KSNA
1
avg 1h 34m · Coast Guard Air Station San Francisco → John Wayne Airport-Orange County

Aircraft types

Equipment used on this number

7
B38M BOEING Boeing 737 MAX 8
343
B738 BOEING Boeing 737-800
27
B737 BOEING Boeing 737-700
18
A320 AIRBUS Airbus A320
11
B739 BOEING Boeing 737-900
9
B39M BOEING Boeing 737 MAX 9
5
A319 AIRBUS Airbus A319
1

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 UAL643

30
N27268BOEING Boeing 737 MAX 8
→
8/11/2026
1h 48m
No alerts
Replay Analysis
N27260BOEING Boeing 737 MAX 8
→
8/11/2026
1h 25m
No alerts
Replay Analysis
N33209BOEING Boeing 737-800
→
8/11/2026
1h 27m
No alerts
Replay Analysis
N37325BOEING Boeing 737 MAX 8
→
8/11/2026
1h 19m
No alerts
Replay Analysis
N37325BOEING Boeing 737 MAX 8
→
8/10/2026
1h 30m
No alerts
Replay Analysis
N37325BOEING Boeing 737 MAX 8
→
8/10/2026
2h 50m
No alerts
Replay Analysis
N37308BOEING Boeing 737 MAX 8
→
8/10/2026
1h 27m
No alerts
Replay Analysis
N47293BOEING Boeing 737 MAX 8
→
8/10/2026
1h 20m
No alerts
Replay Analysis
N37325BOEING Boeing 737 MAX 8
→
8/10/2026
1h 4m
No alerts
Replay Analysis
N37325BOEING Boeing 737 MAX 8
→
8/9/2026
1h 50m
No alerts
Replay Analysis
N37325BOEING Boeing 737 MAX 8
→
8/9/2026
2h 55m
No alerts
Replay Analysis
N27266BOEING Boeing 737 MAX 8
→
8/9/2026
1h 54m
No alerts
Replay Analysis
N17752BOEING Boeing 737-700
→
8/9/2026
46m
No alerts
Replay Analysis
N17752BOEING Boeing 737-700
→
8/8/2026
2h 9m
No alerts
Replay Analysis
N17752BOEING Boeing 737-700
→
8/8/2026
2h 56m
No alerts
Replay Analysis
N17358BOEING Boeing 737 MAX 8
→
8/8/2026
1h 27m
No alerts
Replay Analysis
N17331BOEING Boeing 737 MAX 8
→
8/8/2026
2h 56m
No alerts
Replay Analysis
N1902UAIRBUS Airbus A320
→
8/7/2026
1h 31m
No alerts
Replay Analysis
N17333BOEING Boeing 737 MAX 8
→
8/7/2026
1h 36m
No alerts
Replay Analysis
N17262BOEING Boeing 737 MAX 8
→
8/7/2026
1h 12m
No alerts
Replay Analysis
N17262BOEING Boeing 737 MAX 8
→
8/6/2026
1h 54m
No alerts
Replay Analysis
N17262BOEING Boeing 737 MAX 8
→
8/6/2026
3h 8m
No alerts
Replay Analysis
N27263BOEING Boeing 737 MAX 8
→
8/6/2026
1h 33m
No alerts
Replay Analysis
N17265BOEING Boeing 737 MAX 8
→
8/6/2026
1h 17m
No alerts
Replay Analysis
N27290BOEING Boeing 737 MAX 8
→
8/6/2026
1h 1m
No alerts
Replay Analysis
N27290BOEING Boeing 737 MAX 8
→
8/5/2026
1h 57m
No alerts
Replay Analysis
N27290BOEING Boeing 737 MAX 8
→
8/5/2026
2h 59m
No alerts
Replay Analysis
N35260BOEING Boeing 737-800
→
8/5/2026
1h 35m
No alerts
Replay Analysis
N17358BOEING Boeing 737 MAX 8
→
8/5/2026
1h 28m
No alerts
Replay Analysis
N17337BOEING Boeing 737 MAX 8
→
8/5/2026
1h 6m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window