In a dig at its main rival, Mr Borghetti said Virgin would stick with its focus on yield and margin improvement as "opposed to an overall group market share goal". Qantas and Jetstar have sought to maintain their combined share of the domestic market at 65 per cent. Although there are signs that Australia's four largest airlines are returning to more rational increases in capacity, the battle over the last six months threatens to significantly dent their earnings this financial year.