Japan's All Nippon Airways (ANA) has said the grounding of its Boeing Dreamliner fleet has cost it 8bn yen (£53m).
The announcement comes after the carrier made a second-quarter loss of 6.6bn yen (£44m).
It reversed a small year-earlier profit, despite a 4.4% rise in revenue to 358.3bn yen (£2.38bn).
"The primary reason for the increase in operating expenses was a rise in fuel costs due to the weakening of the yen," it said in a statement.
"Operating revenues were also held back by the suspension of Boeing 787 services for part of the period."\
ANA and domestic rival Japan Airlines, which reports its quarterly results Wednesday, were sideswiped by the grounding of Boeing's new aircraft that began in January.
After a long-running probe the planes were allowed to fly again in June.
The carriers at the time operated about half the Dreamliners in service and had to cancel hundreds of flights in the wake of the crisis, which was caused by problems with the plane's lithium battery.
The carrier and Japan Airlines have said they will seek compensation from Boeing having lost a combined total of more than 22.5bn yen (£149m) in revenue.