Flight OddsBOS → SFO United Airlines
United Airlines · Boston, MA to San Francisco, CA · 1,867 flights, 2025-07-01 to 2026-06-30 · aggregated across 25 flight numbers
On-time arrival
77%
Median delay
-5 min
90th percentile
+53 min
Cancellation rate
1%
How on-time is United Airlines from BOS to SFO?
Across every United Airlines flight number on BOS → SFO (1,867 flights, 2025-07-01 to 2026-06-30), 77% arrived within 15 minutes of schedule. Median arrival delay -5 min; the worst 10% ran +53 min or later. 1% were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 1,414 | 77% |
| 16-30 min | 143 | 8% |
| 31-60 min | 124 | 7% |
| 61-120 min | 100 | 5% |
| 2+ hrs | 62 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 154 | 79% | +5 min |
| 2025-08 | 160 | 88% | -7 min |
| 2025-09 | 167 | 83% | 0 min |
| 2025-10 | 166 | 77% | +7 min |
| 2025-11 | 138 | 80% | +5 min |
| 2025-12 | 131 | 72% | +10 min |
| 2026-01 | 121 | 77% | -3 min |
| 2026-02 | 111 | 77% | +4 min |
| 2026-03 | 144 | 84% | -2 min |
| 2026-04 | 167 | 78% | +8 min |
| 2026-05 | 185 | 76% | +8 min |
| 2026-06 | 199 | 56% | +24 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 272 | 74% |
| Tue | 239 | 83% |
| Wed | 241 | 79% |
| Thu | 275 | 71% |
| Fri | 281 | 75% |
| Sat | 259 | 81% |
| Sun | 276 | 76% |
UA flight numbers on BOS → SFO
Related
Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…