" start your trip in Australia and have a return ticket that will get you back to Australia"
Watch out with AMEX cover as hidden in the depths of the PDS hides a fact that Chubb will only cover a return air ticket & declined my request for 1 way J class tickets to Europe on those grounds. Totally useless if you are cruising home, just another way to avoid a payout. Insurance companies are much of a muchness and as the old Arabic saying goes, they take your money with the right hand & give with the left.
Frankly, I never rely on such coverage & always purchase separately.