India, April 8 -- Delta Air Lines reported Wednesday a loss in its first quarter, compared to prior year's profit, mainly on higher fuel costs, even as revenues climbed on broad demand strength across corporate and leisure.

Looking ahead for the second quarter, the airline projects earnings with revenue growth on flat capacity, reflecting strong demand momentum, meaningful capacity reductions, and rapid actions to recapture higher fuel.

Shares of Delta Air Lines were climbing around 13 percent in the pre-market activity.

Ed Bastian, Delta's chief executive officer, stated, "Demand remains strong, and we are taking actions to protect our margins and cash flow. This includes meaningfully reducing capacity growth, with a downward bias until...