TheBull.com.auVirgin, Delta set frequency 'rules'micebtn (blog)Virgin Blue's V Australia will operate 14 weekly peak-season and 11 off peak flights. Both carriers have caveats for events beyond their control that would prompt them to reduce services. For example, if West Texas Intermediate Crude Oil exceeds US$120 ...Virgin, Delta pledge 21 weekly flightsNinemsnall 4 news articles »