I want to begin my next big overlanding trip by flying from Sydney (home) to either Singapore or Malaysia on a one-way ticket. I will fly home from an as-yet unknown location when my money runs down low or winter gets in the way.
I know many countries or specific airports have policies that arrivals must have a return ticket or an onward ticket to somewhere. I understand that this may be checked when you board the plane but often is not enforced by anyone at all.
What I would like to know is which of these two destinations is more likely to not care about my onward ticket, or to have the cheaper way of proving that I'm leaving.
For instance if I absolutely have to show an onward ticket I'd prefer to be able to arrange some bus ticket or train ticket or ferry ticket, than a flight ticket. And I'd prefer a ticket that is easy to get a full or partial refund on.
Immigration at Kuala Lumpur did not ask me any questions, including whether I had an onward ticket.
but the "document check and baggage drop" counter at Air Asia X in Sydney did ask. They accepted my train ticket to Singapore (which cost about $10).
(I'm not submitting this as an answer because I can't compare to flying into Singapore, since I have not tried that yet.)