Chile's Puyehue volcanoAir terminals in Sydney and Melbourne and in New Zealand are virtually deserted as airlines shut down flights. What few flights that are getting off the ground are flying at less than 20,000 feet to avoid the volcanic ash.
Qantas and Jetstar have grounded flights between Tasmania and Melbourne, Sydney and the Gold Coast. The airlines have cancelled their flights between Australia and New Zealand and Jetstar's domestic flights within New Zealand. A flight to Nadi in Fiji has also been grounded.
Strong winds have carried the ash some 9,400 kilometres across the Pacific since Chile's Puyehue volcano erupted more than a week ago.
Passengers at Hobart Airport have told the ABC they may have to wait several days for another flight.