United Continental Profit Misses

United Continental Holdings on Thursday reported fourth-quarter profit below analysts' expectations and said it expects unit revenue to keep sinking as sharply lower oil prices hurt sales to energy clients around the airline's Houston hub.

United, the second-largest U.S. airline by capacity, doubled its adjusted profit to $934 million, or $2.54 per diluted share. Analysts, on average, expected United to earn about $959 million, or $2.58 per diluted share, according to Thomson Reuters I/B/E/S.

The company forecast a pre-tax profit margin between 8 percent and 10 percent in the first quarter, excluding special items.

It also forecast that passenger unit revenue, which compares ticket sales to flight capacity, will fall between 6 percent and 8 percent in the first quarter from a year ago, on an estimated capacity increase between 1.5 percent and 2.5 percent.

Shares fell less than 1 percent on the news, which suggested more turbulence for the airline after it suffered from steep unit revenue declines in 2015.

The unit revenue forecast was worse than expected, Sterne Agee CRT analyst Adam Hackel said.

For months, a strong U.S. currency has lowered the value of U.S. airlines' foreign sales in dollar terms.

The plummeting price of fuel has helped United's bottom line but hurt revenue from corporate energy clients near Houston's George Bush Intercontinental Airport, where United is the largest airline.

Lower fuel prices have also ramped up competition within the United States, enabling large U.S. carriers to chop fares in line with budget airlines that have lower operating costs, such as Spirit Airlines Inc.

(Reporting by Jeffrey Dastin in New York; Editing by Bernadette Baum and Nick Zieminski)