DL already reported yesterday and the results were a dismal net loss of $164 million.
DL has not done enough to cut costs nor have they done enough to adapt to the new revenue environment.
As for the remaining carriers, I expect JetBlue, Southwest, ATA, Airtran, Frontier, America West, Alaska, Continental and America West to all report a net profit.
American should be right on the bubble. They could post a very small net profit or a small net loss.
Midwest, Northwest, United and USAirways should all post a loss.