ANA Holdings, the parent company of All Nippon Airways, said its profit in the April-September period was 53.97 billion yen (USD 448 million), while revenue rose 6.6 per cent from a year ago.
The airline got a big boost from an expansion of landing slots at Tokyo's Haneda airport, while a weak yen has been drawing record numbers of tourists to Japan.
Falling oil prices have also helped the carrier's bottom line -- fuel is often an airline's single-biggest expense.
Skymark filed for bankruptcy protection in late January in the face of potentially massive penalties linked to a cancelled USD 2.2 billion jet order with Airbus.
The Skymark deal would expand ANA's landing slots and give it the upper hand in setting airfares.
In August, Skymark creditors voted in favour of a rescue plan led by ANA, edging out a rival bid that included US carrier Delta.