Flight OddsAS537 BOS → SEA
Alaska Airlines · Boston, MA to Seattle, WA · 215 flights observed, 2025-07-01 to 2026-06-09 · 2,496 mi
AS537 covers more than one route in the data window — the stats below are for BOS → SEA, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
81%
Median delay
-5 min
90th percentile
+28 min
Cancellation rate
1%
How often is AS537 on time?
Across 215 flights on BOS → SEA from 2025-07-01 to 2026-06-09, AS537 arrived within 15 minutes of schedule 81% of the time. The median arrival delay was -5 min, and the worst 10% of flights arrived +28 min or later. 1% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 172 | 81% |
| 16-30 min | 20 | 9% |
| 31-60 min | 14 | 7% |
| 61-120 min | 1 | 0% |
| 2+ hrs | 5 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 65% | +24 min |
| 2025-08 | 31 | 77% | +3 min |
| 2025-09 | 29 | 97% | -10 min |
| 2025-10 | 31 | 90% | -8 min |
| 2025-11 | 20 | 90% | -8 min |
| 2025-12 | 12 | 42% | +18 min |
| 2026-02 | 14 | 86% | -8 min |
| 2026-03 | 17 | 71% | +20 min |
| 2026-05 | 18 | 89% | -6 min |
| 2026-06 | 9 | 100% | -24 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 30 | 87% |
| Tue | 30 | 80% |
| Wed | 28 | 86% |
| Thu | 31 | 71% |
| Fri | 31 | 77% |
| Sat | 31 | 84% |
| Sun | 31 | 84% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…