Flight OddsUA4661 BOI → SFO
United Airlines · Boise, ID to San Francisco, CA · 69 flights observed, 2026-03-30 to 2026-06-30 · 522 mi
UA4661 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
51%
Median delay
+11 min
90th percentile
+85 min
Cancellation rate
1%
How often is UA4661 on time?
Across 69 flights on BOI → SFO from 2026-03-30 to 2026-06-30, UA4661 arrived within 15 minutes of schedule 51% of the time. The median arrival delay was +11 min, and the worst 10% of flights arrived +85 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 | 34 | 51% |
| 16-30 min | 7 | 10% |
| 31-60 min | 10 | 15% |
| 61-120 min | 12 | 18% |
| 2+ hrs | 4 | 6% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-03 | 2 | 50% | +34 min |
| 2026-04 | 16 | 50% | +40 min |
| 2026-05 | 28 | 54% | +22 min |
| 2026-06 | 21 | 48% | +34 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 12 | 42% |
| Tue | 6 | 67% |
| Wed | 9 | 56% |
| Thu | 11 | 45% |
| Fri | 13 | 31% |
| Sat | 4 | 100% |
| Sun | 12 | 58% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…