US carrier Continental Airlines recorded a net income of $233m between April and June this year, up from a net loss of $213 in Q2 2009.
The pretax profit for the quarter was the second highest since 2000.
Zane Rowe, Continental's chief financial officer, said Continental was "pleased" with the results, but warned: "There is still a lot of work ahead in order to sustain profitability."
The operating income for Q2 2010 was $328m, compared to a loss of $154m over the same period in 2009.
The average fare paid by passengers rose from $196 in Q2 2009, to $236 for the same quarter this year.
The current merger plans with United are going ahead as scheduled, with Continental having recorded $18, of merger-related costs between April and June.
The airline also celebrated the 15th anniversary of its Manchester-New York service this week, Continental's oldest regional destination in the UK.
Almost 2.5 million passengers have flown on the route with Continental since it started in 1995.
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