Flight OddsDL459 SEA → BOS
Delta Air Lines · Seattle, WA to Boston, MA · 365 flights observed, 2025-07-01 to 2026-06-30 · 2,496 mi
On-time arrival
89%
Median delay
-14 min
90th percentile
+17 min
Cancellation rate
2%
How often is DL459 on time?
Across 365 flights on SEA → BOS from 2025-07-01 to 2026-06-30, DL459 arrived within 15 minutes of schedule 89% of the time. The median arrival delay was -14 min, and the worst 10% of flights arrived +17 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 | 317 | 89% |
| 16-30 min | 11 | 3% |
| 31-60 min | 9 | 3% |
| 61-120 min | 10 | 3% |
| 2+ hrs | 9 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 30 | 97% | -17 min |
| 2025-08 | 31 | 94% | -10 min |
| 2025-09 | 30 | 80% | +14 min |
| 2025-10 | 31 | 68% | +18 min |
| 2025-11 | 29 | 86% | -8 min |
| 2025-12 | 30 | 90% | -16 min |
| 2026-01 | 28 | 89% | -7 min |
| 2026-02 | 27 | 89% | +9 min |
| 2026-03 | 31 | 94% | -12 min |
| 2026-04 | 29 | 86% | +10 min |
| 2026-05 | 30 | 97% | -13 min |
| 2026-06 | 30 | 100% | -18 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 48 | 88% |
| Tue | 53 | 89% |
| Wed | 51 | 84% |
| Thu | 52 | 90% |
| Fri | 51 | 90% |
| Sat | 51 | 88% |
| Sun | 50 | 94% |
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…