I am travelling from Bangkok to Melbourne via Sydney with a 2 hours 20 mins layover. The journey is on a single ticket. From BKK to SYD it is Emirates code share with Qantas and from SYD to MEL it is Qantas. Do I need to collect my bags in Sydney? Will I have to go through quarantine? Is the layover time enough?

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    Are you sure you mean quarantine? Are you arriving from an area where there's an infectious diseases in outbreak? Commented May 31, 2018 at 9:09
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    @HenningMakholm That's what it's historically been called in Australia: immigration, customs, and quarantine. It's an agricultural check; they're interested in any food, dirty boots, etc... I think they started calling it "biosecurity" at some point instead, though here I think it's being used as a shorthand for the entire immigration inspection process. Commented May 31, 2018 at 9:37

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You will go through customs and immigration on your first arrival into Australia (so, Sydney). On the second flight, there will be no way of separating international passengers from domestic passengers and so they cannot really do those checks at a later date.

Generally, you will see immigration first, collect your bags, go through customs etc., then recheck your bags for your next flight. Qantas have a specific set of instructions for transfer in Sydney. You will need to get a shuttle bus between terminals.

In Sydney, there will also be another security check and you won't be able to take liquids, gels, etc, through, so don't buy any duty free until after you're past security!

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    Otherwise +1, but you actually can take liquids and gels onto Australian domestic flights! (For now, anyway; sadly there's talk of changing this.) Commented Jun 1, 2018 at 1:23

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