Flight OddsAS311 BOS → PDX
Alaska Airlines · Boston, MA to Portland, OR · 97 flights observed, 2025-07-01 to 2026-06-30 · 2,537 mi
AS311 covers more than one route in the data window — the stats below are for BOS → PDX, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
87%
Median delay
-11 min
90th percentile
+22 min
Cancellation rate
0%
How often is AS311 on time?
Across 97 flights on BOS → PDX from 2025-07-01 to 2026-06-30, AS311 arrived within 15 minutes of schedule 87% of the time. The median arrival delay was -11 min, and the worst 10% of flights arrived +22 min or later. 0% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 84 | 87% |
| 16-30 min | 8 | 8% |
| 31-60 min | 5 | 5% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 3 | 100% | -18 min |
| 2025-11 | 9 | 89% | -4 min |
| 2025-12 | 8 | 63% | +12 min |
| 2026-01 | 4 | 50% | +27 min |
| 2026-03 | 10 | 40% | +16 min |
| 2026-04 | 15 | 100% | -16 min |
| 2026-05 | 18 | 94% | -18 min |
| 2026-06 | 30 | 100% | -20 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 17 | 82% |
| Tue | 17 | 88% |
| Wed | 8 | 100% |
| Thu | 15 | 87% |
| Fri | 17 | 71% |
| Sat | 14 | 93% |
| Sun | 9 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…