Flights between Australia and Bali have resumed as ash plumes from a volcano on the eastern Indonesian island of Sumbawa continue to disperse.
But authorities warn the Mount Sangeang Api volcano still has the potential to disrupt flights.
Jetstar announced on Monday it had resumed flights out of Perth and bound for Denpasar, after cancelling them on Sunday.
Virgin also resumed service to Bali.
While the volcano continued to erupt on Monday, ash clouds that closed Darwin airport on Saturday and caused disruptions to flights between Australia and Bali have dissipated to levels considered safe for planes.
"The volcano itself is actually still erupting but only at a lower level," said a spokesman for the Bureau of Meteorology's Volcanic Ash Advisory Centre in Darwin.
"The winds are actually taking the ash over to the south and west of the volcano, and not near Australia any more."
Mount Sangeang Api, which has been erupting since Friday, sent ash 20km into the sky and over northern Australia.
Darwin was cut off to all air services on Saturday as ash clouds swept southeast over the west side of the Northern Territory and as far south as Alice Springs.
Kristianto, of the Eastern Indonesia division of the country's geological body, says Mount Sangean Api was spewing white ash on Monday to heights of one kilometre.
Tremors had been decreasing since Sunday, but it was still under close observation.
"The danger is still there because we are still recording shallow volcanic earthquakes and surface event earthquakes of a significant nature," he told AAP.
"That's why we can't say how long it could last."
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