Flight OddsDL1561 SEA → ONT
Delta Air Lines · Seattle, WA to Ontario, CA · 29 flights observed, 2025-08-11 to 2025-09-10 · 956 mi
DL1561 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
93%
Median delay
-14 min
90th percentile
+6 min
Cancellation rate
0%
How often is DL1561 on time?
Across 29 flights on SEA → ONT from 2025-08-11 to 2025-09-10, DL1561 arrived within 15 minutes of schedule 93% of the time. The median arrival delay was -14 min, and the worst 10% of flights arrived +6 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 | 27 | 93% |
| 16-30 min | 1 | 3% |
| 31-60 min | 1 | 3% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-08 | 21 | 90% | -10 min |
| 2025-09 | 8 | 100% | -14 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 3 | 67% |
| Tue | 5 | 100% |
| Wed | 5 | 100% |
| Thu | 4 | 75% |
| Fri | 4 | 100% |
| Sat | 4 | 100% |
| Sun | 4 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…