Flight OddsAS528 SEA → SFO
Alaska Airlines · Seattle, WA to San Francisco, CA · 188 flights observed, 2025-10-26 to 2026-06-30 · 679 mi
On-time arrival
58%
Median delay
+10 min
90th percentile
+83 min
Cancellation rate
1%
How often is AS528 on time?
Across 188 flights on SEA → SFO from 2025-10-26 to 2026-06-30, AS528 arrived within 15 minutes of schedule 58% of the time. The median arrival delay was +10 min, and the worst 10% of flights arrived +83 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 | 107 | 58% |
| 16-30 min | 25 | 13% |
| 31-60 min | 27 | 15% |
| 61-120 min | 19 | 10% |
| 2+ hrs | 8 | 4% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-10 | 6 | 67% | +19 min |
| 2025-11 | 23 | 61% | +18 min |
| 2025-12 | 26 | 65% | +12 min |
| 2026-01 | 29 | 83% | +1 min |
| 2026-02 | 22 | 68% | +21 min |
| 2026-03 | 12 | 75% | +5 min |
| 2026-04 | 12 | 42% | +26 min |
| 2026-05 | 28 | 32% | +42 min |
| 2026-06 | 28 | 36% | +36 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 29 | 55% |
| Tue | 26 | 54% |
| Wed | 27 | 67% |
| Thu | 27 | 48% |
| Fri | 28 | 68% |
| Sat | 18 | 72% |
| Sun | 31 | 45% |
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…