Technically possible, yes, unless you get the anally retentive idiot at the check-in counter who thinks you're planning something dodgy at your destination and refuses to check you into your flight. What I have heard is they're only supposed to check you have a valid ticket to fly and your visa is valid for entry into your destination (unless you're headed somewhere the provides a visa on arrival), and no more.
I have met many people where I am (from the UK especially) who arrived on a one-way airfare and have either extended their visas or planned their onward journeys after arriving at their destination.
It has been suggested to me to buy, say, a cheap bus ticket out of your destination country just for the sake of showing an onward journey, even though you may not use said cheap bus ticket.
But don't let them convince you that you cannot go to X country because it does not offer visa on arrival and you do not have a pre-arranged visa; you can go to X country's embassy at your destination or to any travel agent there to arrange this, it doesn't have to be done in Australia! over 4 years ago