The Gunners ended the season in fifth place, their first finish outside the top four under Manger Arsene Wenger.
Emails to season ticket holders revealed that the club had applied a discount to the cost of their tickets which rank among the most expensive in the English Premier League.
"The club has always considered that pricing for the Europa League would be different from the Champions League so we have reviewed our approach for next season and have applied a discount on your season ticket for the Europa League element," the club said in an email to season-ticket holders.
For fans, that means a reduction of about 10 percent depending on their seating level -- with some supporters getting savings of £185.
Arsenal Supporters Trust had called for a cut in season ticket prices and for a redistribution of the seven cup credits to exclude Europa League group matches, which are likely to pit the North London side against modest opponents.