UAL, the parent company of United Airlines, said in a regulatory filing on Monday it expects its second-quarter consolidated traffic to increase by 0.25 to 0.75 revenue passenger miles from the prior-year period.
A revenue passenger mile is an airline industry unit measuring one paying passenger flown one mile.
In a filing with the Securities and Exchange Commission, UAL also said it expects mainline traffic to be flat to down 0.5% and express traffic to rise 6.5% to 7%.
The company forecast mainline operating cost per available seat mile - excluding fuel, severance and special items - will be flat to 0.5% higher during the second quarter. The company previously projected costs would rise 1% in the quarter.
United also projected its mainline passenger unit revenue would increase between 2.75% and 3.25% in the quarter.
The company also said it estimates that cargo, mail and other revenue will be between $420 million and $440 million for the quarter.
Shares of the company fell 33 cents to $35 in aftermarket activity, having closed the regular session down 43 cents at $35.33.