Some Bali flights cancelled after volcano eruption in Indonesia

Dozens of flights to and from Indonesia's Bali island were cancelled on July 7 after a volcano on a nearby island belched a colossal ash tower 18km into the sky, the authorities said.

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The aviation disruption came just weeks after the same rumbling volcano caused dozens of flight cancellations to and from the popular resort island.

Mount Lewotobi Laki-Laki, on the tourist island of Flores, erupted at 11.05am, the volcanology agency said.

"An eruption of Lewotobi Laki-Laki volcano occurred... with the observed ash column height reaching approximately 18,000m above the summit," the agency said in a statement.

It forced the cancellation of 24 flights at Bali's international airport, general manager Ahmad Syaugi Shahab said.

"Several airlines serving the routes to Labuan Bajo (on Flores), Australia, Singapore and South Korea have confirmed cancellations and delays," he said in a statement.

He said the airlines included Virgin Australia, Jetstar Airways and AirAsia Indonesia.