Flight OddsUA1015 SFO → BOS
United Airlines · San Francisco, CA to Boston, MA · 59 flights observed, 2025-08-21 to 2026-06-30 · 2,704 mi
UA1015 covers more than one route in the data window — the stats below are for SFO → BOS, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
97%
Median delay
-21 min
90th percentile
-3 min
Cancellation rate
2%
How often is UA1015 on time?
Across 59 flights on SFO → BOS from 2025-08-21 to 2026-06-30, UA1015 arrived within 15 minutes of schedule 97% of the time. The median arrival delay was -21 min, and the worst 10% of flights arrived -3 min or later. 2% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 56 | 97% |
| 16-30 min | 1 | 2% |
| 31-60 min | 0 | 0% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 1 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-08 | 6 | 100% | -18 min |
| 2025-09 | 13 | 85% | +2 min |
| 2026-05 | 10 | 100% | -20 min |
| 2026-06 | 29 | 100% | -28 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 10 | 100% |
| Tue | 6 | 100% |
| Wed | 5 | 100% |
| Thu | 11 | 91% |
| Fri | 11 | 91% |
| Sat | 6 | 100% |
| Sun | 9 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…