Flight OddsAS388 SEA → STL
Alaska Airlines · Seattle, WA to St. Louis, MO · 228 flights observed, 2025-07-01 to 2026-04-21 · 1,709 mi
AS388 covers more than one route in the data window — the stats below are for SEA → STL, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
86%
Median delay
-10 min
90th percentile
+22 min
Cancellation rate
0%
How often is AS388 on time?
Across 228 flights on SEA → STL from 2025-07-01 to 2026-04-21, AS388 arrived within 15 minutes of schedule 86% of the time. The median arrival delay was -10 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 | 195 | 86% |
| 16-30 min | 19 | 8% |
| 31-60 min | 8 | 4% |
| 61-120 min | 3 | 1% |
| 2+ hrs | 3 | 1% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 81% | +3 min |
| 2025-08 | 31 | 71% | +9 min |
| 2025-09 | 30 | 93% | -4 min |
| 2025-10 | 31 | 90% | -11 min |
| 2025-11 | 30 | 87% | -11 min |
| 2025-12 | 31 | 81% | +3 min |
| 2026-01 | 10 | 70% | +11 min |
| 2026-02 | 1 | 100% | -4 min |
| 2026-03 | 12 | 100% | -24 min |
| 2026-04 | 21 | 100% | -14 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 32 | 72% |
| Tue | 33 | 91% |
| Wed | 32 | 97% |
| Thu | 32 | 88% |
| Fri | 37 | 81% |
| Sat | 30 | 80% |
| Sun | 32 | 91% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…