Delta is opening earnings season for airlines with a $19 million profit for the fourth quarter.

But shares fell in premarket trading as Delta says it is adding more flying capacity. Investors may question if there is enough demand to support it.

Delta plans to increase its capacity as much as 7 percent overall during the first quarter. Much of that is on international routes.

Delta Air Lines Inc. earned 2 cents per share for the fourth quarter. Not counting special items it would have earned 19 cents per share. Analysts surveyed by FactSet expected 25 cents per share.

Revenue rose 14 percent to $7.79 billion, which is more than analysts expected.

Delta shares dropped 4.7 percent to $12.15 in premarket trading.