Indonesia, April 19 -- Thousands of passengers had to postpone their departures from Sam Ratulangi Airport in Manado due to the impact of volcanic ash eruptions from Mount Ruang in Tagulandang, North Sulawesi.

"There are 47 flight routes impacted until the second day," said Maya Damayanti, General Manager of Sam Ratulangi Airport, on Friday.

A total of 47 flights and 6,165 passengers to Jakarta, Surabaya, Sorong, Balikpapan, and several international flights had to be postponed until the next day, she said.

Affected passengers are advised to contact their airlines regarding rescheduling or refunds.

"I hope passengers will be patient in this situation because it is for flight safety, and we will also notify them of any new developments...