Flight OddsAS509 PDX → SEA
Alaska Airlines · Portland, OR to Seattle, WA · 21 flights observed, 2025-10-05 to 2025-10-25 · 129 mi
AS509 covers more than one route in the data window — the stats below are for PDX → SEA, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
85%
Median delay
0 min
90th percentile
+23 min
Cancellation rate
5%
How often is AS509 on time?
Across 21 flights on PDX → SEA from 2025-10-05 to 2025-10-25, AS509 arrived within 15 minutes of schedule 85% of the time. The median arrival delay was 0 min, and the worst 10% of flights arrived +23 min or later. 5% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 17 | 85% |
| 16-30 min | 2 | 10% |
| 31-60 min | 1 | 5% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-10 | 20 | 85% | +4 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 3 | 100% |
| Tue | 3 | 100% |
| Wed | 3 | 33% |
| Thu | 3 | 100% |
| Fri | 2 | 100% |
| Sat | 3 | 67% |
| Sun | 3 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…