Flight Status & Tracker

UAL643

UNITED AIRLINES INC · LAS → SFO · Last tracked Sep 26, 2026

UAL643 is a flight number operated by UNITED AIRLINES INC between McCarran International Airport (KLAS) and San Francisco International Airport (KSFO). SkyMeter last tracked UAL643 on September 26, 2026. The flight is most often flown by a BOEING Boeing 737 MAX 8. Typical block time is 1h 52m. SkyMeter has observed 247 legs of this flight number via ADS-B.

SkyMeter tracks historical flight activity from ADS-B data — this is not a live gate-to-gate status feed.

✈
FLIGHTS
247
last 90 days
⏱
AVG DURATION
1h 52m
tracked time
📅
SERVICE PERIOD
5/28/2025 → 9/26/2026
first → last seen
🗺
ROUTES / TYPES
11 / 6
city pairs · airframes
⚠
INCIDENT RATE
0.0%
0 flagged

Routes flown

By count · last 90 days

7
KLAS → KSFO
77
avg 1h 23m · McCarran → San Francisco
KSNA → KIAH
71
avg 2h 57m · John Wayne Airport-Orange County → George Bush Intercontinental Houston
KSFO → KSNA
69
avg 1h 34m · San Francisco → John Wayne Airport-Orange County
KHAF → KSNA
7
avg 1h 33m · Half Moon Bay → John Wayne Airport-Orange County
US-0188 → KSNA
2
avg 1h 32m · Coast Guard Air Station San Francisco → John Wayne Airport-Orange County
KOAK → KSNA
1
avg 1h 31m · Metropolitan Oakland → John Wayne Airport-Orange County
KSFO → KCNO
1
avg 1h 12m · San Francisco → Chino

Aircraft types

Equipment used on this number

6
B38M BOEING Boeing 737 MAX 8
329
B737 BOEING Boeing 737-700
22
B738 BOEING Boeing 737-800
16
B739 BOEING Boeing 737-900
8
B39M BOEING Boeing 737 MAX 9
8
A320 AIRBUS Airbus A320
6

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
N17373BOEING Boeing 737 MAX 8
→
9/26/2026
1h 43m
No alerts
Replay Analysis
N27722BOEING Boeing 737-700
→
9/25/2026
59m
No alerts
Replay Analysis
N17321BOEING Boeing 737 MAX 8
→
9/24/2026
1h 42m
No alerts
Replay Analysis
N77571BOEING Boeing 737 MAX 9
→
9/24/2026
1h 22m
No alerts
Replay Analysis
N27255BOEING Boeing 737 MAX 8
→
9/24/2026
52m
No alerts
Replay Analysis
N27255BOEING Boeing 737 MAX 8
→
9/23/2026
2h 2m
No alerts
Replay Analysis
N27255BOEING Boeing 737 MAX 8
→
9/23/2026
2h 54m
No alerts
Replay Analysis
N17311BOEING Boeing 737 MAX 8
→
9/23/2026
1h 56m
No alerts
Replay Analysis
N17359BOEING Boeing 737 MAX 8
→
9/23/2026
1h 19m
No alerts
Replay Analysis
N27271BOEING Boeing 737 MAX 8
→
9/23/2026
1h 5m
No alerts
Replay Analysis
N27271BOEING Boeing 737 MAX 8
→
9/23/2026
3h 3m
No alerts
Replay Analysis
N27271BOEING Boeing 737 MAX 8
→
9/23/2026
1h 57m
No alerts
Replay Analysis
N47284BOEING Boeing 737 MAX 8
→
9/22/2026
1h 36m
No alerts
Replay Analysis
N17317BOEING Boeing 737 MAX 8
→
9/22/2026
1h 58m
No alerts
Replay Analysis
N17285BOEING Boeing 737 MAX 8
→
9/22/2026
58m
No alerts
Replay Analysis
N17285BOEING Boeing 737 MAX 8
→
9/22/2026
2h 49m
No alerts
Replay Analysis
N17285BOEING Boeing 737 MAX 8
→
9/22/2026
1h 50m
No alerts
Replay Analysis
N17362BOEING Boeing 737 MAX 8
→
9/21/2026
1h 33m
No alerts
Replay Analysis
N27287BOEING Boeing 737 MAX 8
→
9/21/2026
1h 21m
No alerts
Replay Analysis
N17373BOEING Boeing 737 MAX 8
→
9/21/2026
1h 12m
No alerts
Replay Analysis
N17373BOEING Boeing 737 MAX 8
→
9/21/2026
1h 40m
No alerts
Replay Analysis
N17373BOEING Boeing 737 MAX 8
→
9/21/2026
2h 52m
No alerts
Replay Analysis
N27253BOEING Boeing 737 MAX 8
→
9/20/2026
1h 31m
No alerts
Replay Analysis
N17300BOEING Boeing 737 MAX 8
→
9/20/2026
1h 18m
No alerts
Replay Analysis
N47360BOEING Boeing 737 MAX 8
→
9/20/2026
1h 28m
No alerts
Replay Analysis
N47360BOEING Boeing 737 MAX 8
→
9/20/2026
1h 11m
No alerts
Replay Analysis
N47360BOEING Boeing 737 MAX 8
→
9/20/2026
2h 40m
No alerts
Replay Analysis
N27263BOEING Boeing 737 MAX 8
→
9/19/2026
1h 10m
No alerts
Replay Analysis
N47281BOEING Boeing 737 MAX 8
→
9/19/2026
1h 25m
No alerts
Replay Analysis
N17285BOEING Boeing 737 MAX 8
→
9/19/2026
1h 9m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window