UAL939 is operated by UNITED AIRLINES INC between London Heathrow Airport (EGLL) and San Francisco International Airport (KSFO). The flight is most often flown by a BOEING Boeing 777-200. Typical block time is 2h 15m. SkyMeter has observed 77 legs of this flight number via ADS-B.

✈
FLIGHTS
77
last 90 days
⏱
AVG DURATION
2h 15m
tracked time
📅
SERVICE PERIOD
04/17/2026 → 06/03/2026
first → last seen
🗺
ROUTES / TYPES
3 / 3
city pairs · airframes
⚠
INCIDENT RATE
2.6%
2 flagged

Routes flown

By count · last 90 days

1
EGLL → KSFO
1
avg 10h 47m · London Heathrow → San Francisco

Aircraft types

Equipment used on this number

3
B772 BOEING Boeing 777-200
77
B789 BOEING Boeing 787-9 Dreamliner
32
B77W BOEING Boeing 777-300ER
4

Safety profile

Flagged flights · last 90 days

Go-arounds
1
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 UAL939

30
N26952BOEING Boeing 787-9 Dreamliner
→
06/03/2026
1h 39m
No alerts
Replay Analysis
N26952BOEING Boeing 787-9 Dreamliner
→
06/03/2026
1h 34m
No alerts
Replay Analysis
N26970BOEING Boeing 787-9 Dreamliner
→
06/03/2026
3h 1m
No alerts
Replay Analysis
N26970BOEING Boeing 787-9 Dreamliner
→
06/02/2026
1h 37m
No alerts
Replay Analysis
N61101BOEING Boeing 787-9 Dreamliner
→
06/02/2026
1h 53m
No alerts
Replay Analysis
N61101BOEING Boeing 787-9 Dreamliner
→
06/01/2026
1h 14m
No alerts
Replay Analysis
N61101BOEING Boeing 787-9 Dreamliner
→
06/01/2026
3h 7m
No alerts
Replay Analysis
N61101BOEING Boeing 787-9 Dreamliner
→
06/01/2026
1h 33m
No alerts
Replay Analysis
N61103BOEING Boeing 787-9 Dreamliner
→
06/01/2026
1h 51m
No alerts
Replay Analysis
N61103BOEING Boeing 787-9 Dreamliner
→
05/31/2026
1h 16m
No alerts
Replay Analysis
N61103BOEING Boeing 787-9 Dreamliner
→
05/31/2026
3h 9m
No alerts
Replay Analysis
N61103BOEING Boeing 787-9 Dreamliner
→
05/31/2026
1h 44m
No alerts
Replay Analysis
N21102BOEING Boeing 787-9 Dreamliner
→
05/31/2026
1h 51m
No alerts
Replay Analysis
N81105
→
05/29/2026
1h 1m
No alerts
Replay Analysis
N51104BOEING Boeing 787-9 Dreamliner
→
05/29/2026
1h 52m
No alerts
Replay Analysis
N51104BOEING Boeing 787-9 Dreamliner
→
05/28/2026
1h 12m
No alerts
Replay Analysis
N51104BOEING Boeing 787-9 Dreamliner
→
05/28/2026
3h 5m
No alerts
Replay Analysis
N51104BOEING Boeing 787-9 Dreamliner
→
05/28/2026
1h 24m
» Overspeed
Replay Analysis
N61101BOEING Boeing 787-9 Dreamliner
→
05/28/2026
1h 55m
No alerts
Replay Analysis
N61103BOEING Boeing 787-9 Dreamliner
→
05/27/2026
1h 49m
No alerts
Replay Analysis
N61103BOEING Boeing 787-9 Dreamliner
→
05/26/2026
1h 13m
No alerts
Replay Analysis
N61103BOEING Boeing 787-9 Dreamliner
→
05/26/2026
3h 2m
No alerts
Replay Analysis
N61103BOEING Boeing 787-9 Dreamliner
→
05/26/2026
1h 35m
No alerts
Replay Analysis
N21102BOEING Boeing 787-9 Dreamliner
→
05/26/2026
2h 47m
No alerts
Replay Analysis
N21102BOEING Boeing 787-9 Dreamliner
→
05/25/2026
46m
No alerts
Replay Analysis
N21102BOEING Boeing 787-9 Dreamliner
→
05/25/2026
3h 34m
No alerts
Replay Analysis
N21102BOEING Boeing 787-9 Dreamliner
→
05/25/2026
1h 42m
No alerts
Replay Analysis
N61103BOEING Boeing 787-9 Dreamliner
→
05/25/2026
2h 1m
No alerts
Replay Analysis
N61103BOEING Boeing 787-9 Dreamliner
→
05/24/2026
3h 8m
No alerts
Replay Analysis
N61103BOEING Boeing 787-9 Dreamliner
→
05/24/2026
1h 7m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window