Lufthansa AG issued a profit warning in June, citing rising competition from Middle East carriers.
American CEO Doug Parker told reporters in Fort Worth this week: "We're happy with the demand we are seeing for the product throughout the world."
"The airline is doing very well," Parker added.
"American remains one of our top picks in the sector," said analyst Bob McAdoo at Imperial Capital L.L.C. in a client note. "We expect the new management team to continue to make structural changes, which should extend earnings upside beyond the benefits of traditional merger synergies."
Analyst Helane Becker at Cowen & Co. said in an update: "Overall, the guidance was solid and provides further evidence that 2Q was a very strong quarter for the airlines."
American said passenger traffic rose 1 percent in June.
Second-quarter passenger revenue for each seat-mile flown, a key industry measure, rose 5.5 percent to 6.5 percent compared with an earlier 5.5 percent to 7 percent estimate when American announced May traffic results.
The load factor, or percentage of seats filled by paying passengers, fell to 85 percent in June, compared with 86.9 percent in June 2013.
The decline was primarily on American's international routes, where the number of seats occupied per plane fell from 85.9 percent in June 2013 to 80.9 percent last month.
American expects to post a $330 million noncash tax charge in the second quarter related to selling its fuel-hedging contracts, and $250 million to $300 million in special charges related to its bankruptcy restructuring and merger.
"We highlight potential pricing risk stemming from supply growth in the international markets," said Goldman Sachs & Co. analyst Tom Kim in a note. American's international traffic rose 2.5 percent in the first six months, but "did not keep pace" with the 6.4 percent increased capacity overall, Kim said.
Southwest Airlines said Wednesday passenger traffic rose 2.2 percent in June. The carrier said unit revenue, or passenger revenue for each seat-mile flown, was up 7 percent to 8 percent in June from a year ago. The company said 86.1 percent of its seats were filled with passengers last month, compared to 85 percent in June 2013.
American shares closed up 4.28 percent to $41.99. Southwest gained 1.91 percent to $27.21, and Delta increased 1.43 percent to $36.96.