Flight OddsUA1257 MIA → SFO
United Airlines · Miami, FL to San Francisco, CA · 117 flights observed, 2026-03-05 to 2026-06-30 · 2,585 mi
UA1257 covers more than one route in the data window — the stats below are for MIA → SFO, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
88%
Median delay
-11 min
90th percentile
+18 min
Cancellation rate
1%
How often is UA1257 on time?
Across 117 flights on MIA → SFO from 2026-03-05 to 2026-06-30, UA1257 arrived within 15 minutes of schedule 88% of the time. The median arrival delay was -11 min, and the worst 10% of flights arrived +18 min or later. 1% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 102 | 88% |
| 16-30 min | 10 | 9% |
| 31-60 min | 1 | 1% |
| 61-120 min | 2 | 2% |
| 2+ hrs | 1 | 1% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-03 | 27 | 96% | -21 min |
| 2026-04 | 30 | 80% | -3 min |
| 2026-05 | 30 | 80% | -7 min |
| 2026-06 | 29 | 97% | -5 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 17 | 88% |
| Tue | 16 | 81% |
| Wed | 16 | 94% |
| Thu | 17 | 94% |
| Fri | 17 | 76% |
| Sat | 17 | 94% |
| Sun | 16 | 88% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…