Flight OddsUA512 BOS → SFO
United Airlines · Boston, MA to San Francisco, CA · 6 flights observed, 2026-06-25 to 2026-06-30 · 2,704 mi
UA512 covers more than one route in the data window — the stats below are for BOS → SFO, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
67%
Median delay
+2 min
90th percentile
+69 min
Cancellation rate
0%
How often is UA512 on time?
Across 6 flights on BOS → SFO from 2026-06-25 to 2026-06-30, UA512 arrived within 15 minutes of schedule 67% of the time. The median arrival delay was +2 min, and the worst 10% of flights arrived +69 min or later. 0% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 4 | 67% |
| 16-30 min | 0 | 0% |
| 31-60 min | 0 | 0% |
| 61-120 min | 2 | 33% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-06 | 6 | 67% | +22 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 1 | 0% |
| Tue | 1 | 100% |
| Wed | No data | — |
| Thu | 1 | 0% |
| Fri | 1 | 100% |
| Sat | 1 | 100% |
| Sun | 1 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…