Flight OddsUA4678 BOI → SFO
United Airlines · Boise, ID to San Francisco, CA · 277 flights observed, 2025-08-19 to 2026-06-30 · 522 mi
UA4678 covers more than one route in the data window — the stats below are for BOI → SFO, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
89%
Median delay
-12 min
90th percentile
+18 min
Cancellation rate
0%
How often is UA4678 on time?
Across 277 flights on BOI → SFO from 2025-08-19 to 2026-06-30, UA4678 arrived within 15 minutes of schedule 89% of the time. The median arrival delay was -12 min, and the worst 10% of flights arrived +18 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 | 245 | 89% |
| 16-30 min | 10 | 4% |
| 31-60 min | 7 | 3% |
| 61-120 min | 3 | 1% |
| 2+ hrs | 11 | 4% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-08 | 13 | 92% | +13 min |
| 2025-09 | 30 | 83% | +2 min |
| 2025-10 | 25 | 92% | +4 min |
| 2025-12 | 29 | 93% | -2 min |
| 2026-01 | 31 | 84% | +17 min |
| 2026-02 | 28 | 68% | +25 min |
| 2026-03 | 30 | 90% | -13 min |
| 2026-04 | 29 | 97% | -14 min |
| 2026-05 | 31 | 94% | +1 min |
| 2026-06 | 30 | 97% | +0 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 39 | 87% |
| Tue | 39 | 82% |
| Wed | 40 | 83% |
| Thu | 39 | 95% |
| Fri | 40 | 100% |
| Sat | 40 | 85% |
| Sun | 39 | 90% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…