Flight OddsAS388 STL → SEA
Alaska Airlines · St. Louis, MO to Seattle, WA · 209 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 STL → SEA, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
74%
Median delay
+2 min
90th percentile
+37 min
Cancellation rate
1%
How often is AS388 on time?
Across 209 flights on STL → SEA from 2025-07-01 to 2026-04-21, AS388 arrived within 15 minutes of schedule 74% of the time. The median arrival delay was +2 min, and the worst 10% of flights arrived +37 min or later. 1% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 152 | 74% |
| 16-30 min | 26 | 13% |
| 31-60 min | 20 | 10% |
| 61-120 min | 4 | 2% |
| 2+ hrs | 3 | 1% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 77% | +4 min |
| 2025-08 | 30 | 63% | +10 min |
| 2025-09 | 30 | 83% | -4 min |
| 2025-10 | 27 | 78% | +1 min |
| 2025-11 | 20 | 85% | +4 min |
| 2025-12 | 22 | 50% | +32 min |
| 2026-01 | 10 | 40% | +43 min |
| 2026-02 | 1 | 0% | +22 min |
| 2026-03 | 14 | 79% | +20 min |
| 2026-04 | 20 | 100% | -9 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 30 | 77% |
| Tue | 26 | 88% |
| Wed | 25 | 88% |
| Thu | 30 | 73% |
| Fri | 31 | 68% |
| Sat | 31 | 48% |
| Sun | 32 | 81% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…