Flight OddsBOS → SEA Alaska Airlines
Alaska Airlines · Boston, MA to Seattle, WA · 1,208 flights, 2025-07-01 to 2026-06-30 · aggregated across 17 flight numbers
On-time arrival
71%
Median delay
-2 min
90th percentile
+45 min
Cancellation rate
1%
How on-time is Alaska Airlines from BOS to SEA?
Across every Alaska Airlines flight number on BOS → SEA (1,208 flights, 2025-07-01 to 2026-06-30), 71% arrived within 15 minutes of schedule. Median arrival delay -2 min; the worst 10% ran +45 min or later. 1% were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 847 | 71% |
| 16-30 min | 140 | 12% |
| 31-60 min | 121 | 10% |
| 61-120 min | 51 | 4% |
| 2+ hrs | 27 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 122 | 59% | +20 min |
| 2025-08 | 124 | 78% | +1 min |
| 2025-09 | 119 | 83% | +5 min |
| 2025-10 | 114 | 78% | +3 min |
| 2025-11 | 80 | 81% | -3 min |
| 2025-12 | 81 | 35% | +27 min |
| 2026-01 | 64 | 73% | +7 min |
| 2026-02 | 67 | 78% | -3 min |
| 2026-03 | 89 | 47% | +23 min |
| 2026-04 | 86 | 76% | +7 min |
| 2026-05 | 124 | 80% | -1 min |
| 2026-06 | 116 | 79% | -2 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 168 | 78% |
| Tue | 166 | 69% |
| Wed | 167 | 77% |
| Thu | 170 | 62% |
| Fri | 174 | 71% |
| Sat | 167 | 75% |
| Sun | 174 | 68% |
AS flight numbers on BOS → SEA
Related
Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…