Flight OddsUnited Airlines · Sacramento, CA to San Francisco, CA · 182 flights observed, 2025-07-01 to 2026-03-04 · 86 mi
UA5840 covers more than one route in the data window — the stats below are for SMF → SFO, the one it has flown most recently. The others are linked under “Other routes”.
How often is UA5840 on time?
Across 182 flights on SMF → SFO from 2025-07-01 to 2026-03-04, UA5840 arrived within 15 minutes of schedule 70% of the time. The median arrival delay was -1 min, and the worst 10% of flights arrived +66 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 | 126 | 70% |
| 16-30 min | 19 | 10% |
| 31-60 min | 13 | 7% |
| 61-120 min | 10 | 6% |
| 2+ hrs | 13 | 7% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 22 | 73% | +21 min |
| 2025-08 | 25 | 88% | +6 min |
| 2025-09 | 24 | 67% | +13 min |
| 2025-10 | 6 | 67% | +19 min |
| 2025-11 | 30 | 50% | +31 min |
| 2025-12 | 17 | 76% | +9 min |
| 2026-01 | 25 | 72% | +26 min |
| 2026-02 | 28 | 64% | +83 min |
| 2026-03 | 4 | 100% | -8 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 27 | 59% |
| Tue | 30 | 80% |
| Wed | 30 | 63% |
| Thu | 27 | 74% |
| Fri | 26 | 73% |
| Sat | 20 | 75% |
| Sun | 21 | 62% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…