"It's very early to the merger, but we're off to a great start," said chief executive officer Doug Parker. "Our customers are already experiencing the benefits of our combined network, with more of it to come soon."
The new American, Philadelphia's dominant airline, reported a $2 billion loss for the fourth quarter, which included $2.4 billion in charges related to AMR Corp.'s emergence from bankruptcy protection and merger costs.
Excluding those charges, the combined profit for the new American was $436 million, compared with a year-earlier loss of $42 million. The adjusted profit was 59 cents per share, beating analysts' 55-cent consensus estimate.
Combined revenue was $10 billion, up 8.7 percent from the fourth quarter 2012. Passenger revenue was $8.7 billion, up 8.6 percent.
So far, customers can book select flights on both airlines, and frequent flier club and "elite" members have reciprocal benefits for early check-in, free checked bags, priority seating, and early boarding.
US Airways Dividend Miles members and American's AAdvantage fliers can earn and redeem miles when traveling on either airline's network.
American ended the fourth quarter with $10.3 billion in cash and investments, of which $1 billion was restricted.
American disclosed in a regulatory filing Monday that Parker would receive a salary of $700,000 this year and could get a bonus of twice that if the company earns $2.5 billion in pretax profit. Parker said the majority of his total compensation will come in the form of a stock award that the board will decide this year.
Separately, last month, Parker received a retention bonus of stock that could be worth $18.9 million (based on Monday's closing price) if certain merger goals are met by late 2016.
Officials reiterated that it will be late 2015 before the two airlines fully combine under a single operator certificate, ticket reservation system, and airplanes with the same paint job. The airline has selected the Sabre reservations system.
Shares of American closed up 5.9 percent to $31.96.