Flight OddsSEA → BOS Alaska Airlines
Alaska Airlines · Seattle, WA to Boston, MA · 1,207 flights, 2025-07-01 to 2026-06-30 · aggregated across 12 flight numbers
On-time arrival
75%
Median delay
-3 min
90th percentile
+42 min
Cancellation rate
1%
How on-time is Alaska Airlines from SEA to BOS?
Across every Alaska Airlines flight number on SEA → BOS (1,207 flights, 2025-07-01 to 2026-06-30), 75% arrived within 15 minutes of schedule. Median arrival delay -3 min; the worst 10% ran +42 min or later. 1% were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 892 | 75% |
| 16-30 min | 130 | 11% |
| 31-60 min | 97 | 8% |
| 61-120 min | 57 | 5% |
| 2+ hrs | 16 | 1% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 124 | 57% | +21 min |
| 2025-08 | 123 | 56% | +15 min |
| 2025-09 | 120 | 68% | +17 min |
| 2025-10 | 113 | 69% | +9 min |
| 2025-11 | 78 | 86% | -4 min |
| 2025-12 | 87 | 89% | -8 min |
| 2026-01 | 64 | 89% | -4 min |
| 2026-02 | 68 | 81% | -3 min |
| 2026-03 | 88 | 90% | -9 min |
| 2026-04 | 86 | 78% | +3 min |
| 2026-05 | 124 | 81% | -6 min |
| 2026-06 | 117 | 77% | +2 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 171 | 75% |
| Tue | 166 | 78% |
| Wed | 171 | 74% |
| Thu | 173 | 71% |
| Fri | 174 | 74% |
| Sat | 167 | 78% |
| Sun | 170 | 74% |
AS flight numbers on SEA → BOS
Related
Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…