Flight OddsBOS → SEA Delta Air Lines
Delta Air Lines · Boston, MA to Seattle, WA · 1,006 flights, 2025-07-01 to 2026-06-30 · aggregated across 5 flight numbers
On-time arrival
72%
Median delay
0 min
90th percentile
+39 min
Cancellation rate
2%
How on-time is Delta Air Lines from BOS to SEA?
Across every Delta Air Lines flight number on BOS → SEA (1,006 flights, 2025-07-01 to 2026-06-30), 72% arrived within 15 minutes of schedule. Median arrival delay 0 min; the worst 10% ran +39 min or later. 2% were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 712 | 72% |
| 16-30 min | 142 | 14% |
| 31-60 min | 71 | 7% |
| 61-120 min | 34 | 3% |
| 2+ hrs | 29 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 84 | 74% | +13 min |
| 2025-08 | 85 | 93% | -9 min |
| 2025-09 | 77 | 84% | +4 min |
| 2025-10 | 87 | 79% | -6 min |
| 2025-11 | 82 | 77% | +3 min |
| 2025-12 | 72 | 49% | +24 min |
| 2026-01 | 60 | 67% | +9 min |
| 2026-02 | 53 | 72% | +19 min |
| 2026-03 | 81 | 33% | +27 min |
| 2026-04 | 85 | 81% | +4 min |
| 2026-05 | 111 | 77% | +3 min |
| 2026-06 | 111 | 71% | +18 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 146 | 73% |
| Tue | 146 | 71% |
| Wed | 141 | 73% |
| Thu | 149 | 68% |
| Fri | 145 | 74% |
| Sat | 115 | 75% |
| Sun | 146 | 71% |
DL flight numbers on BOS → SEA
Related
Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…