American Airlines and Delta Air Lines Inc. have matched United's increase in the fee for changing a domestic-flight reservation from $150 to $200.
US Airways Group Inc. matched the increase last week.
United Continental Holdings Inc. has said that it incurs costs when a customer changes a reservation and the higher fee compensates for the cost.
Matt Miller with Fort Worth-based AMR Corp.'s American Airlines noted that American sells fares called "Choice Essential" and "Choice Plus" that allow customers to change reservations at no extra cost. The tickets cost more than a base economy fare, however.
Dallas-based Southwest Airlines Co. does not charge a change fee.