Cause & Effect

So I wonder if this

Delta Air Lines Inc., the least unionized major carrier, told flight attendants, reservation agents and administrative workers they won't receive raises this year. The same group of workers, 40,000 of the airline's 60,000 employees, didn't get pay raises last year.

contributes to this

Delta Air Lines . . .ranked at the bottom for on-time arrivals in February, according to the Department of Transportation's monthly performance reports.

Atlanta-based Delta came in 17th out of 18 airlines ranked by the DOT, with a 70.9 percent on-time arrival rate, compared to 76.5 percent in January.