Flight OddsUnited Airlines · Boston, MA to San Francisco, CA · 144 flights observed, 2025-09-25 to 2026-03-04 · 2,704 mi
UA2279 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”.
How often is UA2279 on time?
Across 144 flights on BOS → SFO from 2025-09-25 to 2026-03-04, UA2279 arrived within 15 minutes of schedule 82% of the time. The median arrival delay was -15 min, and the worst 10% of flights arrived +47 min or later. 3% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 115 | 82% |
| 16-30 min | 6 | 4% |
| 31-60 min | 8 | 6% |
| 61-120 min | 5 | 4% |
| 2+ hrs | 6 | 4% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-09 | 6 | 100% | -27 min |
| 2025-10 | 31 | 90% | -9 min |
| 2025-11 | 30 | 90% | -7 min |
| 2025-12 | 15 | 53% | +22 min |
| 2026-01 | 29 | 72% | -8 min |
| 2026-02 | 26 | 85% | -4 min |
| 2026-03 | 3 | 100% | -23 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 19 | 79% |
| Tue | 18 | 78% |
| Wed | 20 | 85% |
| Thu | 21 | 86% |
| Fri | 21 | 81% |
| Sat | 21 | 86% |
| Sun | 20 | 80% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…