Aer Lingus returned to profit in the second quarter of the year, thanks to cost cuts that more than offset losses from the Icelandic volcanic ash cloud.
It posted a pretax profit of 15.4 million euros in the second quarter versus a 13.8 million euro loss in the same period a year ago.
The second largest Irish airline after Ryanair vowed to defend its independence by cutting costs further into next year.
Aer Lingus has stopped flying unprofitable routes to the US, cut fuel costs and frozen staff wages.
After reporting full-year losses for both 2008 and 2009, it is still projecting that it will at least break even on an operating level before exceptional items this year, barring major action by its employees against the cost cuts.