Flight OddsAS489 SEA → ONT
Alaska Airlines · Seattle, WA to Ontario, CA · 167 flights observed, 2025-10-26 to 2026-06-30 · 956 mi
AS489 covers more than one route in the data window — the stats below are for SEA → ONT, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
73%
Median delay
-1 min
90th percentile
+42 min
Cancellation rate
1%
How often is AS489 on time?
Across 167 flights on SEA → ONT from 2025-10-26 to 2026-06-30, AS489 arrived within 15 minutes of schedule 73% of the time. The median arrival delay was -1 min, and the worst 10% of flights arrived +42 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 | 122 | 73% |
| 16-30 min | 24 | 14% |
| 31-60 min | 12 | 7% |
| 61-120 min | 6 | 4% |
| 2+ hrs | 2 | 1% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-10 | 3 | 67% | +28 min |
| 2025-11 | 20 | 70% | +7 min |
| 2025-12 | 22 | 55% | +18 min |
| 2026-01 | 20 | 85% | -5 min |
| 2026-02 | 6 | 100% | -14 min |
| 2026-03 | 14 | 86% | +1 min |
| 2026-04 | 30 | 77% | +3 min |
| 2026-05 | 28 | 68% | +10 min |
| 2026-06 | 23 | 74% | +8 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 30 | 87% |
| Tue | 19 | 58% |
| Wed | 18 | 67% |
| Thu | 28 | 75% |
| Fri | 27 | 63% |
| Sat | 15 | 87% |
| Sun | 29 | 76% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…