Flight OddsSEA → ONT Alaska Airlines
Alaska Airlines · Seattle, WA to Ontario, CA · 1,268 flights, 2025-07-01 to 2026-06-30 · aggregated across 18 flight numbers
On-time arrival
78%
Median delay
-3 min
90th percentile
+37 min
Cancellation rate
2%
How on-time is Alaska Airlines from SEA to ONT?
Across every Alaska Airlines flight number on SEA → ONT (1,268 flights, 2025-07-01 to 2026-06-30), 78% arrived within 15 minutes of schedule. Median arrival delay -3 min; the worst 10% ran +37 min or later. 2% were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 970 | 78% |
| 16-30 min | 124 | 10% |
| 31-60 min | 85 | 7% |
| 61-120 min | 45 | 4% |
| 2+ hrs | 18 | 1% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 140 | 63% | +19 min |
| 2025-08 | 131 | 66% | +12 min |
| 2025-09 | 105 | 89% | -6 min |
| 2025-10 | 92 | 83% | +5 min |
| 2025-11 | 104 | 78% | +5 min |
| 2025-12 | 93 | 68% | +11 min |
| 2026-01 | 85 | 82% | +2 min |
| 2026-02 | 79 | 84% | 0 min |
| 2026-03 | 90 | 87% | +1 min |
| 2026-04 | 92 | 89% | -8 min |
| 2026-05 | 114 | 80% | +1 min |
| 2026-06 | 117 | 81% | +1 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 193 | 83% |
| Tue | 175 | 80% |
| Wed | 166 | 78% |
| Thu | 189 | 75% |
| Fri | 183 | 74% |
| Sat | 145 | 83% |
| Sun | 191 | 75% |
AS flight numbers on SEA → ONT
Related
Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…