Virgin Australia has cancelled all flights in and out of Bali as volcanic ash spewing from the Mount Raung volcano continues to cause havoc.

Virgin says the eruption and unfavourable winds have created unsuitable flying conditions, and the airline is urging customers in Bali not to go to Denpasar airport until they have confirmed another booking.

The unfavourable winds are expected to continue throughout Wednesday.

Jetstar earlier cancelled four flights in and out of Bali and delayed two others.

The volcano has played havoc with flights since it began spewing the corrosive, silica-based ash in early July.

Virgin says it will provide another update on Wednesday evening.