Delta Air Lines dragged down U.S. airlines after the carrier trimmed its profit outlook, citing the rising price of jet fuel.
Second-quarter earnings will be no more than $1.75 a share, Delta said in a statement Wednesday.
That is down from a previous forecast of as much as $2 a share.
Fuel prices have risen about 12 percent since the beginning of the quarter, and fares typically take six months to a year to catch up, the No. 2 U.S. airline said.
Delta cut its forecast six weeks after a similar move by American Airlines, the world's biggest carrier.
Other airlines are likely to follow suit, said Adam Hackel, an analyst at Imperial Capital. "You'll certainly see over the next week or two some more revisions as they get fuel fully priced in," he said.
Delta's share price fell 2.9 percent early Wednesday, but rebounded later. For the day, Delta was down slightly less than 1 percent at $54.17.
The early decline was the sharpest on a Standard & Poor's index of five major U.S. airlines.