United Airlines reported a slight dip in profits Wednesday as operating expenses ticked higher, adding that a strengthening demand outlook would boost fourth-quarter results.

The big US carrier reported third-quarter profits of $949 million, down 1.7 percent from the year-ago level, as growth in operating expenses edged out the increase in revenues of 2.6 percent to $15.2 billion.

The company estimated fourth-quarter profits of between $3.00 and $3.50 per share, better than Wall Street estimates.

United is poised for a "strong" fourth quarter "as the demand environment strengthens," said a United press release.

The outlook echoes bullish commentary about consumer appetite earlier this month from Delta Air Lines.

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