Flight OddsSEA → ONT Delta Air Lines
Delta Air Lines · Seattle, WA to Ontario, CA · 1,113 flights, 2025-07-01 to 2026-06-30 · aggregated across 12 flight numbers
On-time arrival
90%
Median delay
-9 min
90th percentile
+15 min
Cancellation rate
0%
How on-time is Delta Air Lines from SEA to ONT?
Across every Delta Air Lines flight number on SEA → ONT (1,113 flights, 2025-07-01 to 2026-06-30), 90% arrived within 15 minutes of schedule. Median arrival delay -9 min; the worst 10% ran +15 min or later. 0% were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 1,001 | 90% |
| 16-30 min | 44 | 4% |
| 31-60 min | 38 | 3% |
| 61-120 min | 15 | 1% |
| 2+ hrs | 11 | 1% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 122 | 88% | -4 min |
| 2025-08 | 103 | 93% | -7 min |
| 2025-09 | 90 | 93% | -9 min |
| 2025-10 | 92 | 93% | -6 min |
| 2025-11 | 83 | 93% | -7 min |
| 2025-12 | 90 | 82% | +1 min |
| 2026-01 | 65 | 88% | -2 min |
| 2026-02 | 56 | 86% | +1 min |
| 2026-03 | 84 | 88% | +1 min |
| 2026-04 | 108 | 91% | -2 min |
| 2026-05 | 124 | 94% | -6 min |
| 2026-06 | 92 | 91% | -8 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 160 | 89% |
| Tue | 164 | 91% |
| Wed | 159 | 89% |
| Thu | 157 | 89% |
| Fri | 155 | 87% |
| Sat | 155 | 95% |
| Sun | 159 | 92% |
DL flight numbers on SEA → ONT
Related
Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…