Two weeks in Oceania forces one decision before anything else: whether the trip is Australia, Australia plus New Zealand, or an island stop that eats four days of flying. I have booked all three versions. The one I would repeat chose the route first and bought the flights second.
Getting there without losing the first two days

Everything on this side of the world sits further apart than a map suggests. The long haul is one leg, the islands are another, and the internal hops you add later are where the trip quietly gets expensive. My rule is simple: land, sleep, move. Nothing gets booked before noon on day one, because jet lag turns a clever connection into an expensive mistake.
Choose the entry city by what you want afterwards. Sydney works when the plan leans toward coast, cities and the reef. Auckland works when the plan is New Zealand walking with a short island hop attached. If the islands are the entire point, fly straight to them and treat the mainland as a stopover rather than as a second holiday.
A worked example beats a list of principles. My standard version of this trip runs two nights in Auckland, an early bus north that takes about three and a half hours to Rotorua, two nights there for the geothermal ground, then the train south. Three bases, one long transfer, and no morning spent in an airport queue.
One note on scope: the region runs from tropical lagoon to alpine ground, which means two packing lists and two sets of opening hours. Trying to cover both inside a fortnight usually means the trip happens in terminals.
The other trade-off is time against money. Internal flights are the largest single line in a regional budget, and a fare booked weeks ahead usually costs less than the same seat in the final week. I would rather pay for that leg early than give up two days of the trip to a coach.
When to go: three calendars, not one
There is no single good month for Oceania, because you are effectively choosing between three separate seasons. Pick the one that matches your reason for going, then let the rest of the plan follow from it.
- May to October, dry season: beaches, island hopping and snorkeling in calm water under clear skies. This is the working window for Fiji, the Cook Islands and the Great Barrier Reef.
- December to February, southern summer: long days, festivals and surf along the Australian coast, particularly the Gold Coast. The trade-off is the wet season in the north, so Cairns and Darwin are humid and storm-prone in exactly this period.
- December to March, New Zealand summer: the strongest stretch for walking. The Tongariro Alpine Crossing is at its most straightforward, and Milford Sound gets the long daylight that makes the drive there worth doing in one go.
The honest version of this choice is a trade-off. Northern Australia in January is warm, cheap and wet. The same week in Hobart is cool, dry and quiet. Neither is wrong, but they suit different trips, and pretending the weather will sort itself out is how people end up with four rained-out days.
Events can decide the dates on their own. Sydney's New Year's Eve, the Bula Festival in Fiji in July, Waitangi Day in New Zealand in February, and the Naghol land diving in Vanuatu between April and June are fixed points you can plan around instead of around a forecast.
What is worth the distance
I plan around one anchor per island and let the rest fill in around it. On the reef, boats leave Cairns daily and the run out to the outer sections takes most of a morning, so book a full day rather than a half one. In New Zealand, Rotorua's geothermal ground and the Milford Road give you two entirely different versions of the same country within a few days of each other.
The islands each carry one thing that justifies the fare. Bora Bora and Aitutaki Lagoon are about the water, Mount Yasur on Vanuatu is about standing beside an active volcano at dusk, and Savai'i in Samoa rewards anyone willing to drive slowly around it. Closer to the cities, the Waitomo caves and the short ferry to Rottnest Island are half-day trips that do not require a tour group.
Nature does not ask much of the itinerary. Clear water, volcanic ground, dramatic coastline and dense rainforest tend to sit within a few hours of each other, which is why one base can cover more than it looks like it can. Wildlife follows the same pattern: kangaroos and wallabies beside ordinary roads, koalas in the tree line outside coastal towns, and New Zealand's birdlife, kiwi included, as the reason several reserves exist at all.
If the trip is short, the choice gets easier. Two anchors in a fortnight, one in Australia and one in New Zealand, leave room for a weather day, whereas three islands plus two countries turns the itinerary into a sequence of check-ins. I have run that version once and would not repeat it.
Where the eating happens
Food follows the climate. Australian cities run on café culture, and a good breakfast will cover most mornings while beach barbecues handle the evenings. New Zealand's Māori hāngī, food cooked in the ground, is the one meal I would build a day around rather than squeeze in between sights.
On the islands it is simpler and better for it: tropical fruit, coconut-based dishes, and seafood that was still in the water the same morning. Meals are rarely complicated, and that is exactly what suits the heat and the pace.
Getting around and the pace that works
Distances are large, flights are long, and some islands have thin infrastructure, so the plan needs slack built into it. I book inter-island flights early and leave ground days loose. Weather turns faster than the forecast suggests, which is why layers beat one heavy jacket from Sydney to Queenstown.
The rail option is worth checking before you default to a domestic flight. New Zealand's TranzAlpine runs from Christchurch to Greymouth in about four and a half hours across the pass, and it replaces a whole day of driving with a window seat. In Australia the longer coastal trains work the same way, and they arrive in the city centre instead of an hour outside it.
Island time is not a slogan, it is a schedule. Boats leave when they leave, small shops close when they close, and a plan written in fifteen-minute slots will be wrong by lunchtime. The travelers who enjoy this region most are the ones who cut their list in half before they arrive.
Distances on foot deserve the same honesty. A town centre that looks compact on the map can hold two hours of uphill path, and the last bus out of a trailhead often leaves earlier than the return time quoted in a guide, which is why I check the departure board before I start walking.
If you do one thing before booking anything else, decide which single stretch of water or trail the trip is built around, then place everything else within a day of it. That one choice fixes your flights, your season and the length of each stop in a single sitting.