routeloads.
Route profile IAD-SJO

IAD ↔ SJO loads

How full flights are between Dulles and San José (Alajuela), both directions combined, using the latest 12 months of DOT T-100 data ending Jun 2026.

LATEST 12-MONTH WINDOW

IAD to SJO averages 77% full

Dulles and San José (Alajuela): 77% average load factor, 29k passengers, and 38k seats across both directions in the latest 12-month BTS window.

Load factor
77%
Passengers
29k
Seats
38k

Monthly trend

MonthLoadPassengers
Jul 202580%5k
Aug 202563%3k
Nov 202586%2k
Dec 202569%6k
Jan 202672%6k
Feb 202695%2k
Mar 202692%3k
Apr 202689%2k
May 202693%155