routeloads.
Route profile SEA-STL

SEA ↔ STL loads

How full flights are between Seattle and St Louis, both directions combined, using the latest 12 months of DOT T-100 data ending Apr 2026.

LATEST 12-MONTH WINDOW

SEA to STL averages 87% full

Seattle and St Louis: 87% average load factor, 264k passengers, and 305k seats across both directions in the latest 12-month BTS window.

Load factor
87%
Passengers
264k
Seats
305k

Monthly trend

MonthLoadPassengers
May 202582%23k
Jun 202587%35k
Jul 202589%38k
Aug 202590%35k
Sep 202588%29k
Oct 202586%19k
Nov 202586%15k
Dec 202585%16k
Jan 202683%11k
Feb 202682%11k
Mar 202689%16k
Apr 202684%17k