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Route profile IAD-STL

IAD ↔ STL loads

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

LATEST 12-MONTH WINDOW

IAD to STL averages 79% full

Dulles and St Louis: 79% average load factor, 57k passengers, and 72k seats across both directions in the latest 12-month BTS window.

Load factor
79%
Passengers
57k
Seats
72k

Monthly trend

MonthLoadPassengers
May 202584%5k
Jun 202584%5k
Jul 202583%5k
Aug 202582%5k
Sep 202582%5k
Oct 202578%4k
Nov 202579%5k
Dec 202576%5k
Jan 202674%4k
Feb 202673%4k
Mar 202676%5k
Apr 202675%5k