Originally Posted by A1pax

We want to return home some time in 2021, when the Australian government re-opens the borders for normal flights. We will take the jab / vaccine to get exemption from having to do the 14 days mandatory quarantine in hotels. In BA current schedules, they show alternative flights with other airlines (eg CX). The question is: would we be able to ask BA to book us on another one world airline such as CX or QR or JL or QF flights from LHR to SYD - if these are operating? Or, not possible since our booking was with a 2-4-1 voucher?