Flight OddsAS571 SEA → ONT
Alaska Airlines · Seattle, WA to Ontario, CA · 18 flights observed, 2026-06-10 to 2026-06-30 · 956 mi
AS571 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
56%
Median delay
+13 min
90th percentile
+41 min
Cancellation rate
0%
How often is AS571 on time?
Across 18 flights on SEA → ONT from 2026-06-10 to 2026-06-30, AS571 arrived within 15 minutes of schedule 56% of the time. The median arrival delay was +13 min, and the worst 10% of flights arrived +41 min or later. 0% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 10 | 56% |
| 16-30 min | 4 | 22% |
| 31-60 min | 3 | 17% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 1 | 6% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-06 | 18 | 56% | +19 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 3 | 67% |
| Tue | 3 | 67% |
| Wed | 3 | 67% |
| Thu | 3 | 33% |
| Fri | 3 | 33% |
| Sat | No data | — |
| Sun | 3 | 67% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…