If flying from US through Sydney and on to Auckland do you have go customs in Sydney?

When flying from the United States to Auckland, New Zealand, with a stopover in Sydney, Australia, you may or may not have to go through customs in Sydney. It depends on the airline and the specific flight itinerary.

If you are flying on a single ticket with the same airline, you may be able to check your luggage through to Auckland and will not need to go through customs in Sydney. In this case, your luggage will be transferred from one plane to the next without you having to collect it.

However, if you are flying on separate tickets or with different airlines, you will most likely need to go through customs in Sydney. This is because you will be entering Australia and will need to present your passport and any required travel documents to the Australian Border Force. You may also need to collect your luggage from the baggage claim area and re-check it for your flight to Auckland.

It is important to check with your airline or travel agent to confirm whether or not you will need to go through customs in Sydney. You should also allow plenty of time for your layover in Sydney, especially if you need to go through customs and collect your luggage.