The U.S. airline industry is slowly adding jobs -- although not all carriers are growing.
The Transportation Department said Thursday that passenger airlines employed the equivalent of 383,610 full-time workers in March, up nearly 1 percent from a year earlier. It's the fourth straight monthly gain.
United Airlines had the most workers, 80,694, but that's down 2.1 percent.
Dallas-based Southwest Airlines and its AirTran Airways subsidiary shrank by 1.4 percent.
Delta Air Lines added the most jobs, followed by US Airways, Fort Worth-based American Airlines and JetBlue.
Spirit Airlines and Allegiant Air grew fastest in percentage terms, both posting double-digit gains.