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Is Southwest Airlines on time St. Louis to Seattle?

103 flights · January 2025 – August 2026 · all airlines on STL to SEA →

54.37%

Arrived on time

Route average 77.57%

0%

Cancelled

Route average 0.9%

43 min

When late, late by

The other airlines on this route

Airline Flights On time Grade
Alaska Airlines 781 80.67% C

Month by month

Jul 2025 peak 71 Jun 2026
On-time arrival rate, %