Flight OddsDL491 JFK → SEA
Delta Air Lines · New York, NY to Seattle, WA · 170 flights observed, 2025-07-01 to 2025-12-18 · 2,422 mi
DL491 covers more than one route in the data window — the stats below are for JFK → SEA, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
86%
Median delay
-10 min
90th percentile
+28 min
Cancellation rate
2%
How often is DL491 on time?
Across 170 flights on JFK → SEA from 2025-07-01 to 2025-12-18, DL491 arrived within 15 minutes of schedule 86% of the time. The median arrival delay was -10 min, and the worst 10% of flights arrived +28 min or later. 2% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 144 | 86% |
| 16-30 min | 8 | 5% |
| 31-60 min | 7 | 4% |
| 61-120 min | 4 | 2% |
| 2+ hrs | 4 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 30 | 87% | -6 min |
| 2025-08 | 31 | 84% | -7 min |
| 2025-09 | 30 | 93% | -11 min |
| 2025-10 | 31 | 94% | -14 min |
| 2025-11 | 29 | 86% | +4 min |
| 2025-12 | 16 | 63% | +28 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 23 | 91% |
| Tue | 25 | 80% |
| Wed | 25 | 92% |
| Thu | 23 | 87% |
| Fri | 24 | 83% |
| Sat | 24 | 83% |
| Sun | 23 | 87% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…