Flight OddsAS306 BOS → SEA
Alaska Airlines · Boston, MA to Seattle, WA · 116 flights observed, 2025-10-26 to 2026-06-09 · 2,496 mi
AS306 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
60%
Median delay
+9 min
90th percentile
+49 min
Cancellation rate
2%
How often is AS306 on time?
Across 116 flights on BOS → SEA from 2025-10-26 to 2026-06-09, AS306 arrived within 15 minutes of schedule 60% of the time. The median arrival delay was +9 min, and the worst 10% of flights arrived +49 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 | 68 | 60% |
| 16-30 min | 16 | 14% |
| 31-60 min | 20 | 18% |
| 61-120 min | 6 | 5% |
| 2+ hrs | 3 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-10 | 4 | 100% | -17 min |
| 2025-11 | 22 | 68% | +8 min |
| 2025-12 | 13 | 54% | +13 min |
| 2026-03 | 10 | 30% | +36 min |
| 2026-04 | 24 | 50% | +19 min |
| 2026-05 | 31 | 65% | +14 min |
| 2026-06 | 9 | 78% | +11 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 20 | 60% |
| Tue | 10 | 60% |
| Wed | 15 | 80% |
| Thu | 16 | 38% |
| Fri | 18 | 56% |
| Sat | 14 | 86% |
| Sun | 20 | 50% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…