Airport authorities said up to 10 percent of the 1,200 flights at the Indonesian capital's airport were canceled. But they suggested the 11 carriers' cancellations were premature because ash from the erupting volcano more than 400 kilometers to the east had not reached Jakarta.
The volcano continued to rumble and groan on Saturday, at times spitting ash up to eight kilometers into the sky. Merapi staged its most thunderous eruptions on Friday - blasts that volcano experts said were Merapi's biggest since the 1870s.
The death toll from 12 days of eruptions has now reached at least 128.