An Australia and New Zealand trip: how to split two, three or four weeks

Does it fit? The minimum sensible length

The question comes up constantly. A pair of honeymooners on a busy r/travel thread asked whether three weeks for both was too much, and the replies split roughly down the middle: half said pick one, half said go, but keep it tight. We sit with the second half. Three weeks is enough if you accept that each country gets one region done well rather than a highlights reel of the whole map.

What makes it hard is the distance inside each country, not the gap between them. Sydney to Auckland is a shorter flight than New York to Los Angeles. New Zealand looks small on the map and drives big: our how many days guide explains why ten days is the floor for one island done without rushing.

Under two weeks, pick one country. You lose most of a day to the date line on the way out, a day to the Tasman crossing and its airport time, and at least a day to jet lag. On a ten day trip that is a third of it gone. If you are still choosing between them, New Zealand or Australia is the page for that decision.

How to split two, three and four weeks

These are the splits we would suggest to a friend, counted in nights on the ground. They assume Sydney as the Australian base, because that is where most of the US flights go.

Two weeks: one city in Australia, one island in New Zealand. This is the plan for someone who already booked a fortnight in New Zealand and wonders, like the poster on this thread, whether to add Sydney and Melbourne. Add Sydney. Skip Melbourne.

Three weeks: two Australian bases, one New Zealand island done properly, or a quick taste of both islands.

Four weeks: now both New Zealand islands fit, and Australia gets three regions instead of two.

Which order: open-jaw flights from the US

Book an open-jaw ticket: into Sydney, home from Auckland, or the reverse. Tourism Australia lists nonstops into Sydney from Los Angeles on four airlines, plus San Francisco, Dallas and Houston, with Melbourne and Brisbane also served from the West Coast, and most of them leave just after 10pm. Auckland has its own nonstops from Los Angeles, San Francisco, Houston and New York among others; Auckland Airport keeps the current list. The Tasman hop in between is a one-way ticket, bought separately or added to the long-haul booking.

Going out you cross the date line and land two calendar days after you left. Coming home you get the day back, and the flight is quicker with the tailwind: Air New Zealand puts Auckland to Los Angeles at about 12 hours 5 minutes. Our flight times guide has the full table.

All else being equal, start in Sydney and finish in New Zealand. Not for the fares, which rarely care about the direction, but for the jet lag. Your first two days should be spent in a walkable city, not behind the wheel on the left-hand side of a mountain road. Sydney is built for a jet-lagged first day. The South Island is built for the third week, when you are awake and the driving is the point. If the season pushes you the other way, start with a night in Auckland or Christchurch before you collect a car.

Flying between Australia and New Zealand

The Tasman is a short hop with international paperwork: passports, customs and a biosecurity declaration on the New Zealand side. The flying itself is about three hours from the east coast cities; Air New Zealand gives Auckland to Sydney as about 3 hours 35 minutes, over 2,160 kilometres.

Queenstown takes daily flights from four Australian cities, which is the single most useful fact in this guide for a South Island trip: you can fly Sydney to Queenstown and be on the lakefront by mid-afternoon without ever seeing Auckland. On price, Air New Zealand's own fare pages showed one-way economy from about NZ$300 to NZ$380 (roughly US$180 to US$230) on Christchurch to Melbourne and Queenstown to Sydney for dates from October 2026, and three to four times that in September school holidays. Treat those as a snapshot from late September 2026, not a promise.

Which half to start with, by season

The two countries share seasons, but not climates. New Zealand is at its best from December to March and good through the shoulders either side. Northern Australia runs on a wet and dry cycle: the Bureau of Meteorology puts the tropical wet season from October to April and the dry from May to September. The reef and the tropical north want the dry. The South Island wants summer. You cannot have both at their peak in the same month, so the order is how you get closest.

Winter in New Zealand is not a write-off: Queenstown is at its liveliest and the geothermal North Island does not care what month it is. The best time to visit Australia and New Zealand goes month by month for both.

The New Zealand half: which island, and who drives

With ten days, choose one island. The South Island is the one most Americans picture: fiords, glaciers, lakes, the road from Queenstown to Milford Sound. The North Island is volcanoes, geothermal valleys, Māori culture in Rotorua and the Bay of Islands, and it is the better half in winter. North Island or South Island goes through the choice properly. With two weeks or more you can do both, and the Cook Strait ferry becomes part of the trip.

Then decide who drives. Some travellers are happy to take the wheel; others would rather someone else deal with one-lane bridges and the Milford road. Our self-drive holidays give you the car, the beds and the booked activities with the route already planned. Our guided tours give you a coach, a driver guide and a group, and nothing to navigate. If your New Zealand half is ten days, a guided tour from Auckland to Christchurch covers both islands, which is hard to do yourself in the same time.

Budget: what the combined trip costs

We will not pretend to price Australia to the dollar, because we do not sell it. What we can say is that it sits in a similar band to New Zealand on the ground, and that the long-haul flight is usually the largest single line. For New Zealand, our trip cost guide puts a comfortable mid-range trip at NZ$350 to NZ$550 per person per day, two sharing, flights excluded.

US dollar figures use the rate we checked on 29 September 2026, about 60 US cents to the New Zealand dollar; bookings settle in NZD, so they move with the currency.

Entry paperwork for Americans: two apps, two fees

US passport holders need an electronic authority for each country, and neither is a visa. An airline will not board you without them.

• Australia: the Electronic Travel Authority, applied for only through the official AustralianETA app. Home Affairs says there is a service charge of AUD20 and no other charge; it allows visits of up to three months at a time over a 12 month period.
• New Zealand: the NZeTA, from NZ$17 through the official app and valid for two years, plus the NZ$100 international visitor levy charged with it. Immigration New Zealand says to allow 72 hours. Our entry requirements guide covers the arrival declaration and the biosecurity rules.
• Skip the lookalike websites that charge several times the official fee to fill in the same form. Use the government apps.