Flight OddsSTL → SEA Alaska Airlines
Alaska Airlines · St. Louis, MO to Seattle, WA · 781 flights, 2025-07-01 to 2026-06-30 · aggregated across 7 flight numbers
On-time arrival
82%
Median delay
-5 min
90th percentile
+31 min
Cancellation rate
1%
How on-time is Alaska Airlines from STL to SEA?
Across every Alaska Airlines flight number on STL → SEA (781 flights, 2025-07-01 to 2026-06-30), 82% arrived within 15 minutes of schedule. Median arrival delay -5 min; the worst 10% ran +31 min or later. 1% were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 632 | 82% |
| 16-30 min | 61 | 8% |
| 31-60 min | 55 | 7% |
| 61-120 min | 14 | 2% |
| 2+ hrs | 9 | 1% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 91 | 74% | +7 min |
| 2025-08 | 87 | 72% | +9 min |
| 2025-09 | 77 | 87% | -9 min |
| 2025-10 | 60 | 90% | -6 min |
| 2025-11 | 49 | 92% | -4 min |
| 2025-12 | 53 | 57% | +24 min |
| 2026-01 | 37 | 81% | +8 min |
| 2026-02 | 37 | 92% | -9 min |
| 2026-03 | 51 | 88% | +2 min |
| 2026-04 | 58 | 95% | -2 min |
| 2026-05 | 81 | 83% | +2 min |
| 2026-06 | 90 | 83% | +2 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 115 | 83% |
| Tue | 104 | 86% |
| Wed | 102 | 88% |
| Thu | 117 | 77% |
| Fri | 117 | 83% |
| Sat | 98 | 72% |
| Sun | 118 | 85% |
AS flight numbers on STL → SEA
Related
Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…