A number of flights in and out of Bali have been cancelled due to the ash threat from the Mount Raung volcano in Indonesia. Virgin Australia diverted four flights during the day on Saturday and cancelled six flights scheduled for Saturday night. Virgin Australia spokesman Luke O'Donnell said four flights on Sunday had been cancelled. "Our team of meteorologists are continuing to monitor the situation, in consultation with the Volcanic Ash Advisory Centre (VAAC)," he said. "The safety of our guests and crew is our highest priority, and we will recommence normal operations as soon as the volcanic ash safely allows." Jetstar has cancelled all Bali flights for the remainder of Saturday. Jetstar spokesman Luke Enright said the weather would monitored and an update on Sunday's Bali services provided as soon as possible. "We regret the impact these cancellations and delays are having on our passengers, particularly during the busy school holiday period, but we will always put safety before schedule," he said. Weather conditions on Saturday resulted in an ash cloud from Mount Raung drifting closer to Denpasar International Airport. Several flights were cancelled on Thursday and Friday after the VAAC raised its ash advisory from code orange to code red. VAAC meteorologist Craig Earl-Spurr said the ash cloud was currently coded orange. "It's quite a thin plume, it's not a large eruption at all," he said. "It's just a mild low-level eruption but the volcano's only about 80 nautical miles from Denpasar. "The wind just happens to be blowing directly towards Denpasar from the volcano. "It's not uncommon to see these plumes on and off and last a few days, sometimes even weeks. "It's very difficult to tell if this is the end of it or if it will continue over the coming days."