DALLAS — Southwest Airlines Co. said Tuesday that passenger traffic and a key revenue figure rose slightly last month compared with March 2013.
Revenue for every seat flown one mile rose about 1 percent last month. That’s a closely watched figure in the airline business, and it rises when more seats are filled or average fares increase.
Passengers flew 9.6 billion miles on Southwest and its AirTran Airways subsidiary last month, up 1.6 percent over March 2013. The company increased passenger-carrying capacity by 0.8 percent by cutting flights.
That made the average flight 82.7 percent full, up from 82.0 percent a year earlier.
Shares of Dallas-based Southwest fell 14 cents to $23.29 in midday trading.