BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
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AIRLINE × ROUTE REPORT
STL→SEA

Alaska Airlines St. Louis, MO (STL) to Seattle, WA (SEA) reliability

Among 781 scheduled Alaska Airlines flights from STL to SEA, 79.6% arrived on time, 10.5% arrived at least 30 minutes late, and 1.0% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Marketing carrier: Alaska Airlines (AS) · Updated September 16, 2026

HISTORICAL ROUTE SIGNALGenerally reliable
79.6%arrived on time
10.5%30+ min late
1.0%cancelled
781scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
30+ minutes late10.5%
60+ minutes late3.2%
Cancelled1.0%
Average arrival+2.2 mincompleted flights

What did Alaska Airlines STL to SEA record?

Alaska Airlines completed 98.7% of its scheduled reportable STL to SEA flights in the observation window. 79.6% of all scheduled flights arrived less than 15 minutes late, while 3.2% arrived at least an hour late.

What were Alaska Airlines STL to SEA disruption rates?

For Alaska Airlines STL-to-SEA flights, 10.5% arrived at least 30 minutes late, 1.0% were cancelled, and 0.3% were diverted.

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What was the Alaska Airlines STL to SEA scheduled cohort?

The Alaska Airlines STL-to-SEA cohort contained 781 scheduled flights; 771 completed, 8 were cancelled, and 2 were diverted.

Not a prediction.

This is a descriptive historical rate. Schedule changes, seasonal operations and current conditions may differ.