The prospectus for the float, released on Monday, said Virgin Blue, co-owned by Virgin and Australian transport group Patrick Corp, would offer shares at between A$1.80 and A$2.25 each. The final pricing will be determined by Virgin when an institutional book-building exercise closes on 5 December. The indicative price range values Virgin Blue at up to A$2.3bn - a modest premium to domestic Australian rival Qantas.