The airline also said its unit expenses, excluding fuel, would be up as much as 7.5% over the year earlier period.shares fell more than 4% in premarket trading on Wednesday after the carrier cut its second-quarter revenue forecast, citing changing booking patterns.Southwest expects revenue per available seat mile, the amount the airline brings in for every seat it flies one mile, will fall between 4% and 4.5% in the second quarter over last year, after previously estimating a 1.5% to 3.
It said its capacity would rise as much as 9% instead after forecasting flat growth in how much it flies.Airlines are raking in record numbers of passengers but higher costs and growth in capacity have weighed on fares and profits.