Chelsea have returned more than 800 unsold tickets for the Champions League final with Manchester City in Porto.
The Blues were given 5,800 tickets by Uefa for Saturday's game and there was a high demand for 2,800 tickets which were sold with independent travel.
However, the unsold tickets were part of a charter package, which included subsidised flights at £200.
Chelsea Supporter Trust board member Dan Silver said: "Uefa's lack of care for fans has again come to the fore."
He added: "They came to be our friends over the European Super League but now they have turned their backs on us again.