Flight OddsAS3431 PDX → SEA
Alaska Airlines · Portland, OR to Seattle, WA · 164 flights observed, 2025-07-01 to 2026-06-30 · 129 mi
AS3431 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
79%
Median delay
-1 min
90th percentile
+29 min
Cancellation rate
0%
How often is AS3431 on time?
Across 164 flights on PDX → SEA from 2025-07-01 to 2026-06-30, AS3431 arrived within 15 minutes of schedule 79% of the time. The median arrival delay was -1 min, and the worst 10% of flights arrived +29 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 | 130 | 79% |
| 16-30 min | 20 | 12% |
| 31-60 min | 8 | 5% |
| 61-120 min | 3 | 2% |
| 2+ hrs | 3 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 68% | +22 min |
| 2025-08 | 31 | 74% | +8 min |
| 2025-09 | 30 | 87% | -2 min |
| 2025-10 | 31 | 81% | +3 min |
| 2025-11 | 20 | 95% | -10 min |
| 2026-06 | 21 | 76% | +31 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 23 | 83% |
| Tue | 24 | 96% |
| Wed | 24 | 67% |
| Thu | 24 | 67% |
| Fri | 23 | 74% |
| Sat | 23 | 100% |
| Sun | 23 | 70% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…