Virgin Australia are having a Friends and Family offer which they have given permission to be shared.
"Sale starts tomorrow and ends 22 April.
Virgin Australia’s family and friends discounted flight offer is back! Take-off with up to 50% off domestic airfares including Business Class, and up to 25% off selected international airfares including Business Class. Head to the Virgin Australia website and use the promo code DSW45 to access this great offer. Fares that have been discounted will show a promo tag on them. Travel dates are restricted as are the number of discounted flights. Book between 18 April and 22 April for travel between 1 May and 26 June 2019."