Flight OddsUnited Airlines · San Luis Obispo, CA to San Francisco, CA · 53 flights observed, 2026-03-29 to 2026-05-20 · 191 mi
UA1639 covers more than one route in the data window — the stats below are for SBP → SFO, the one it has flown most recently. The others are linked under “Other routes”.
How often is UA1639 on time?
Across 53 flights on SBP → SFO from 2026-03-29 to 2026-05-20, UA1639 arrived within 15 minutes of schedule 79% of the time. The median arrival delay was +5 min, and the worst 10% of flights arrived +28 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 | 42 | 79% |
| 16-30 min | 6 | 11% |
| 31-60 min | 3 | 6% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 2 | 4% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-03 | 3 | 67% | +6 min |
| 2026-04 | 30 | 87% | +17 min |
| 2026-05 | 20 | 70% | +41 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 8 | 75% |
| Tue | 8 | 75% |
| Wed | 8 | 75% |
| Thu | 7 | 86% |
| Fri | 7 | 71% |
| Sat | 7 | 71% |
| Sun | 8 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…