Flight OddsAS523 SJC → SEA
Alaska Airlines · San Jose, CA to Seattle, WA · 177 flights observed, 2025-10-26 to 2026-06-09 · 696 mi
AS523 covers more than one route in the data window — the stats below are for SJC → SEA, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
85%
Median delay
-11 min
90th percentile
+25 min
Cancellation rate
1%
How often is AS523 on time?
Across 177 flights on SJC → SEA from 2025-10-26 to 2026-06-09, AS523 arrived within 15 minutes of schedule 85% of the time. The median arrival delay was -11 min, and the worst 10% of flights arrived +25 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 | 149 | 85% |
| 16-30 min | 14 | 8% |
| 31-60 min | 7 | 4% |
| 61-120 min | 4 | 2% |
| 2+ hrs | 2 | 1% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-10 | 6 | 83% | -6 min |
| 2025-11 | 29 | 79% | -1 min |
| 2025-12 | 24 | 75% | +14 min |
| 2026-01 | 30 | 90% | -10 min |
| 2026-02 | 28 | 100% | -19 min |
| 2026-03 | 16 | 75% | +3 min |
| 2026-04 | 6 | 100% | -24 min |
| 2026-05 | 28 | 82% | +2 min |
| 2026-06 | 9 | 78% | -6 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 28 | 82% |
| Tue | 25 | 84% |
| Wed | 23 | 100% |
| Thu | 26 | 81% |
| Fri | 24 | 92% |
| Sat | 25 | 80% |
| Sun | 25 | 76% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…