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 34m. SkyMeter has observed 169 legs of this flight number via ADS-B.

✈
FLIGHTS
169
last 90 days
⏱
AVG DURATION
3h 34m
tracked time
📅
SERVICE PERIOD
5/27/2025 → 8/13/2026
first → last seen
🗺
ROUTES / TYPES
10 / 5
city pairs · airframes
⚠
INCIDENT RATE
0.6%
1 flagged

Routes flown

By count · last 90 days

5
KMIA → KSFO
80
avg 5h 33m · Miami → San Francisco
KSFO → KSAN
63
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
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
78
B38M BOEING Boeing 737 MAX 8
64
B39M BOEING Boeing 737 MAX 9
20
B739 BOEING Boeing 737-900
7
A319 AIRBUS Airbus A319
2

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
N73275BOEING Boeing 737-800
→
8/13/2026
1h 44m
No alerts
Replay Analysis
N825UAAIRBUS Airbus A319
→
8/13/2026
4h 8m
No alerts
Replay Analysis
N77530BOEING Boeing 737-800
→
8/12/2026
1h 13m
No alerts
Replay Analysis
N828UAAIRBUS Airbus A319
→
8/12/2026
3h 57m
No alerts
Replay Analysis
N78285BOEING Boeing 737-800
→
8/11/2026
1h 35m
No alerts
Replay Analysis
N76288BOEING Boeing 737-800
→
8/10/2026
1h 33m
No alerts
Replay Analysis
N27255BOEING Boeing 737 MAX 8
→
8/10/2026
5h 15m
No alerts
Replay Analysis
N16234BOEING Boeing 737-800
→
8/9/2026
1h 47m
No alerts
Replay Analysis
N47298BOEING Boeing 737 MAX 8
→
8/9/2026
11m
No alerts
Replay Analysis
N67501BOEING Boeing 737 MAX 9
→
8/8/2026
5h 13m
No alerts
Replay Analysis
N77295BOEING Boeing 737-800
→
8/7/2026
1h 53m
No alerts
Replay Analysis
N17361BOEING Boeing 737 MAX 8
→
8/7/2026
5h 20m
No alerts
Replay Analysis
N66828BOEING Boeing 737-900
→
8/6/2026
5h 24m
No alerts
Replay Analysis
N76254BOEING Boeing 737-800
→
8/5/2026
1h 36m
No alerts
Replay Analysis
N27323BOEING Boeing 737 MAX 8
→
8/5/2026
5h 22m
No alerts
Replay Analysis
N27269BOEING Boeing 737 MAX 8
→
8/4/2026
1h 40m
No alerts
Replay Analysis
N47293BOEING Boeing 737 MAX 8
→
8/4/2026
5h 25m
No alerts
Replay Analysis
N87507BOEING Boeing 737-800
→
8/3/2026
1h 27m
No alerts
Replay Analysis
N27258BOEING Boeing 737 MAX 8
→
8/3/2026
5h 39m
No alerts
Replay Analysis
N78524BOEING Boeing 737-800
→
8/2/2026
1h 44m
No alerts
Replay Analysis
N17341BOEING Boeing 737 MAX 8
→
8/2/2026
5h 38m
No alerts
Replay Analysis
N37537BOEING Boeing 737 MAX 9
→
8/1/2026
5h 14m
No alerts
Replay Analysis
N73278BOEING Boeing 737-800
→
7/31/2026
1h 43m
No alerts
Replay Analysis
N77259BOEING Boeing 737 MAX 8
→
7/31/2026
5h 38m
No alerts
Replay Analysis
N11206BOEING Boeing 737-800
→
7/30/2026
1h 50m
No alerts
Replay Analysis
N37353BOEING Boeing 737 MAX 8
→
7/30/2026
5h 22m
No alerts
Replay Analysis
N78511BOEING Boeing 737-800
→
7/29/2026
1h 45m
No alerts
Replay Analysis
N27256BOEING Boeing 737 MAX 8
→
7/29/2026
5h 34m
No alerts
Replay Analysis
N87531BOEING Boeing 737-800
→
7/28/2026
1h 35m
No alerts
Replay Analysis
N17338BOEING Boeing 737 MAX 8
→
7/28/2026
5h 20m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window