Flight OddsUnited Airlines · Arcata/Eureka, CA to San Francisco, CA · 274 flights observed, 2025-07-01 to 2026-05-20 · 250 mi
UA5539 covers more than one route in the data window — the stats below are for ACV → SFO, the one it has flown most recently. The others are linked under “Other routes”.
How often is UA5539 on time?
Across 274 flights on ACV → SFO from 2025-07-01 to 2026-05-20, UA5539 arrived within 15 minutes of schedule 77% of the time. The median arrival delay was -12 min, and the worst 10% of flights arrived +57 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 | 203 | 77% |
| 16-30 min | 16 | 6% |
| 31-60 min | 21 | 8% |
| 61-120 min | 12 | 5% |
| 2+ hrs | 13 | 5% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 77% | +11 min |
| 2025-08 | 31 | 87% | -8 min |
| 2025-09 | 7 | 100% | -23 min |
| 2025-10 | 31 | 74% | 0 min |
| 2025-11 | 27 | 78% | +8 min |
| 2025-12 | 28 | 86% | 0 min |
| 2026-01 | 27 | 81% | +3 min |
| 2026-02 | 23 | 70% | +53 min |
| 2026-03 | 21 | 95% | -12 min |
| 2026-04 | 19 | 53% | +19 min |
| 2026-05 | 20 | 45% | +30 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 41 | 73% |
| Tue | 36 | 83% |
| Wed | 37 | 73% |
| Thu | 41 | 73% |
| Fri | 42 | 86% |
| Sat | 32 | 81% |
| Sun | 36 | 67% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…