UAL1257

UNITED AIRLINES INC · MIA → SFO

UAL1257 is operated by UNITED AIRLINES INC between Miami International Airport (KMIA) and San Francisco International Airport (KSFO). The flight is most often flown by a BOEING Boeing 737-800. Typical block time is 3h 28m. SkyMeter has observed 167 legs of this flight number via ADS-B.

✈
FLIGHTS
167
last 90 days
⏱
AVG DURATION
3h 28m
tracked time
📅
SERVICE PERIOD
05/27/2025 → 08/19/2026
first → last seen
🗺
ROUTES / TYPES
11 / 5
city pairs · airframes
⚠
INCIDENT RATE
0.6%
1 flagged

Routes flown

By count · last 90 days

6
KMIA → KSFO
73
avg 5h 32m · Miami → San Francisco
KSFO → KSAN
64
avg 1h 39m · San Francisco → San Diego
KHAF → KSAN
10
avg 1h 39m · Half Moon Bay → San Diego
KOAK → KSAN
2
avg 1h 35m · Metropolitan Oakland → San Diego
KSTL → KSFO
2
avg 4h 5m · St Louis Lambert → San Francisco
71FL → KSFO
1
avg 5h 42m · Miami Federal Reserve Bank Heliport → San Francisco

Aircraft types

Equipment used on this number

5
B738 BOEING Boeing 737-800
80
B38M BOEING Boeing 737 MAX 8
63
B39M BOEING Boeing 737 MAX 9
15
A319 AIRBUS Airbus A319
6
B739 BOEING Boeing 737-900
5

Safety profile

Flagged flights · last 90 days

Go-arounds
1
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 UAL1257

30
N874UAAIRBUS Airbus A319
→
08/19/2026
3h 5m
No alerts
Replay Analysis
N18223BOEING Boeing 737-800
→
08/18/2026
1h 43m
No alerts
Replay Analysis
N827UAAIRBUS Airbus A319
→
08/17/2026
4h 2m
No alerts
Replay Analysis
N12238BOEING Boeing 737-800
→
08/16/2026
2h 6m
No alerts
Replay Analysis
N871UAAIRBUS Airbus A319
→
08/16/2026
4h 7m
No alerts
Replay Analysis
N76504BOEING Boeing 737-800
→
08/15/2026
1h 47m
No alerts
Replay Analysis
N877UAAIRBUS Airbus A319
→
08/14/2026
4h 29m
No alerts
Replay Analysis
N73275BOEING Boeing 737-800
→
08/13/2026
1h 44m
No alerts
Replay Analysis
N825UAAIRBUS Airbus A319
→
08/13/2026
4h 8m
No alerts
Replay Analysis
N77530BOEING Boeing 737-800
→
08/12/2026
1h 13m
No alerts
Replay Analysis
N828UAAIRBUS Airbus A319
→
08/12/2026
3h 57m
No alerts
Replay Analysis
N78285BOEING Boeing 737-800
→
08/11/2026
1h 35m
No alerts
Replay Analysis
N76288BOEING Boeing 737-800
→
08/10/2026
1h 33m
No alerts
Replay Analysis
N27255BOEING Boeing 737 MAX 8
→
08/10/2026
5h 15m
No alerts
Replay Analysis
N16234BOEING Boeing 737-800
→
08/09/2026
1h 47m
No alerts
Replay Analysis
N47298BOEING Boeing 737 MAX 8
→
08/09/2026
11m
No alerts
Replay Analysis
N67501BOEING Boeing 737 MAX 9
→
08/08/2026
5h 13m
No alerts
Replay Analysis
N77295BOEING Boeing 737-800
→
08/07/2026
1h 53m
No alerts
Replay Analysis
N17361BOEING Boeing 737 MAX 8
→
08/07/2026
5h 20m
No alerts
Replay Analysis
N66828BOEING Boeing 737-900
→
08/06/2026
5h 24m
No alerts
Replay Analysis
N76254BOEING Boeing 737-800
→
08/05/2026
1h 36m
No alerts
Replay Analysis
N27323BOEING Boeing 737 MAX 8
→
08/05/2026
5h 22m
No alerts
Replay Analysis
N27269BOEING Boeing 737 MAX 8
→
08/04/2026
1h 40m
No alerts
Replay Analysis
N47293BOEING Boeing 737 MAX 8
→
08/04/2026
5h 25m
No alerts
Replay Analysis
N87507BOEING Boeing 737-800
→
08/03/2026
1h 27m
No alerts
Replay Analysis
N27258BOEING Boeing 737 MAX 8
→
08/03/2026
5h 39m
No alerts
Replay Analysis
N78524BOEING Boeing 737-800
→
08/02/2026
1h 44m
No alerts
Replay Analysis
N17341BOEING Boeing 737 MAX 8
→
08/02/2026
5h 38m
No alerts
Replay Analysis
N37537BOEING Boeing 737 MAX 9
→
08/01/2026
5h 14m
No alerts
Replay Analysis
N73278BOEING Boeing 737-800
→
07/31/2026
1h 43m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window