routeloads.
Route profile IAD-SEA

IAD → SEA loads

How full flights are between Dulles and Seattle, using the latest 12 months of DOT T-100 data ending Mar 2026.

LATEST 12-MONTH WINDOW

IAD to SEA averages 85% full

Dulles to Seattle: 85% average load factor, 552k passengers, and 648k seats in the latest 12-month BTS window.

Load factor
85%
Passengers
552k
Seats
648k

Monthly trend

MonthLoadPassengers
Apr 202582%43k
May 202585%58k
Jun 202588%70k
Jul 202591%75k
Aug 202592%68k
Sep 202580%48k
Oct 202579%40k
Nov 202578%30k
Dec 202586%35k
Jan 202679%25k
Feb 202679%24k
Mar 202690%34k