One wet and windy day does not make an airport rescue plan

Every so often, Kāpiti Airport gets handed the perfect anecdote. A miserable day hits Wellington, flights are delayed or cancelled, and travellers are frustrated. Meanwhile, Air Chathams keeps operating out of Kāpiti and someone inevitably says: “See? This is why the airport must be saved.”

It is an understandable reaction. When Wellington Airport is struggling with the weather and Kāpiti is still moving people, the value of having another runway in the region can feel deceptively obvious. For the passengers who got where they needed to go, it was not theoretical. It was practical, immediate, and useful.

But a few wet and windy days a year do not settle the wider airport debate.

It shows that Kāpiti Airport can be useful in certain, narrow circumstances. It does not prove that the airport is commercially viable. It does not prove that public money should be used to prop it up or buy it. It does not prove that Kāpiti ratepayers should carry the cost of preserving a privately owned airport. And it certainly does not answer the bigger question of whether the land, infrastructure, and public effort tied up in the airport are being put to their best long-term use.

The idea of Kāpiti as a simple back-up also assumes disruptions are neatly isolated to Wellington Airport. Often they are not. Severe weather can affect the whole lower North Island transport network at once, including other airports, roads, ferries, and power. A second runway only solves the problem if the disruption is specific to Wellington and Kāpiti is both operational and useful to the passengers who need moving.

This has always been one of the more frustrating parts of the Kāpiti Airport debate. Specific examples of usefulness are often treated as if they answer every other question.

They do not.

A better test is not whether Kāpiti Airport is occasionally useful. It is whether the organisations that would benefit most from that usefulness actually treat it as part of their operational planning.

That is where the Air New Zealand question becomes important.

If Kāpiti Airport really was practical, economical, and operationally useful as a back-up for Wellington Airport, you would expect Air New Zealand to have a plan to use it during disruptions.

Air New Zealand has every incentive to keep passengers moving. Cancelled flights are expensive. Disrupted passengers are unhappy. Aircraft and crews end up in the wrong places. The airline does not cancel flights for fun, nor does it leave obvious practical alternatives unused if they would genuinely make disruption easier to manage.

So if Kāpiti Airport was a realistic pressure valve for Wellington’s weather problems, we would likely see that reflected in what actually happens during disruption events. We would see Air New Zealand diverting there, bussing passengers, repositioning aircraft, or otherwise treating it as part of the wider regional aviation network.

But that is not what happens.

Instead, Wellington disruptions generally mean Wellington disruptions: delays, cancellations, rebookings, and passengers being moved through the airline’s existing network. That tells us something important. Not everything that looks useful on a map is useful in an airline operation.

A runway is only one part of the equation. Airlines also have to consider aircraft type, runway performance, ground handling, terminal capacity, security, crew positioning, passenger transfers, baggage, engineering support, fuel, onward connections, and whether the cost and complexity of using an alternative airport actually improves the situation.

For Air Chathams, operating a small scheduled service from Kāpiti is one thing. For Air New Zealand, using Kāpiti as a meaningful diversion airport for disrupted Wellington passengers is quite another.

That is not a side issue. It goes to the heart of the airport debate.

The fact that Air Chathams can operate from Kāpiti on a day when Wellington is struggling does show that Kāpiti Airport can be useful. But the fact that Air New Zealand does not appear to treat it as a practical diversion solution suggests its usefulness has limits.

Those limits are exactly what the public debate needs to be honest about.

Yes, regional air connectivity has value. Yes, resilience matters. Yes, having an airport north of Wellington could be helpful during some commercial passenger flight disruptions. But if the argument is that Kāpiti Airport provides a regional resilience function, then that needs to be tested as a regional resilience issue. It should be assessed properly at a regional level, weighed against other resilience priorities across the Wellington region, and if it stacks up then it could be funded transparently by the region.

It should not, as some would have it, become a blank cheque written by Kāpiti ratepayers every time bad weather hits Wellington Airport.

Of course, if people genuinely believe Kāpiti Airport is a regional asset, then that has implications for the wider local government debate too. It is hard to argue that the airport should be treated as a Wellington regional asset, supported by Wellington regional ratepayers, while also insisting Kāpiti should sit outside regional decision-making.

If the airport is genuinely regional infrastructure, then the case for it needs to be made regionally, tested regionally, and funded regionally. That argument sits much more comfortably with a Wellington region that makes these decisions together than with Kāpiti standing apart while asking others to help pay the bill. I eagerly look forward to Kāpiti Airport supporters becoming pro-amalgamation supporters…

The same applies to passenger flights. If there is enough sustained demand for flights from Kāpiti, then that should be visible in the long-term numbers, not just in a burst of social media enthusiasm on days when Wellington Airport is having a shocker. Occasional convenience is not the same as a durable business case, and Air Chathams’ looming departure suggests the demand was not there at a level that made the route commercially sustainable.

This all matters because saving the airport is not cost-free.

It means choosing one future for a large and strategically important piece of land over another. It means deciding whether the district’s priority is preserving aviation activity, enabling housing and commercial redevelopment, or finding some hybrid option. It may mean pressure for public support, either directly or indirectly. And it means being honest about who benefits, who pays, and what else Kāpiti gives up.

None of that is answered by pointing to a day when Air Chathams operated normally while Wellington had cancellations.

That day can be evidence of something. It can be part of the conversation. It may even strengthen the case for keeping some aviation capability on the Coast.

But it is not the conversation by itself.

If the airport’s supporters want to make a serious case, they need to move beyond anecdotes and nostalgia. They need to show what level of service is genuinely sustainable, what investment is required, who is prepared to fund it, and why that future is better for Kāpiti than the alternatives.

If they can find private investors willing to fund and subsidise this, then (as I’ve said on many occasions) fantastic! If it is public money they are after, then we need to have a proper public debate based on clear and reasoned assessment of robust and independently sourced evidence.

I’ve been clear over the years that the airport’s role in providing a back up for air ambulance services is one of the strongest cases for central government, through its responsibility for health services, to step up to the plate and do something. Yet we have had years of silence from the Beehive.

Ultimately, a rainy day at Wellington Airport may remind us why people feel attached to Kāpiti Airport. But it does not, on its own, make the case for keeping it.

As a post-script, I do not accept the claim from some airport supporters that I have somehow opposed every attempt to keep the airport viable.

I helped our former MP Nathan Guy campaign for a new airline to step in when Air New Zealand left Kāpiti. Similarly, when I was on Kāpiti Coast District Council, I supported the council’s loan to Air Chathams to help restart air services after the pandemic lockdowns, along with the ongoing grants for tourism promotion to support the route.

The idea was straightforward: if our residents used the service enough to make it commercially viable, then regular passenger flights would strengthen the airport’s overall viability.

As we can now see, that did not happen.

Where my concern and critique of the arguments for retention come from now is not hostility to the airport, or indifference to those who value it. It comes from the fact that Kāpiti has already had years of opportunities to prove that regular passenger services could stand on their own feet with a reasonable level of support.

I wanted that to work. Many people did. But wanting something to work is not the same as it working.

At some point, the debate has to move beyond whether people like the idea of having an airport and confront the evidence in front of us. Public support was provided. Political support was provided. Community goodwill was provided. The airline gave the route another chance.

Yet the demand still does not appear to have been strong enough to make the service commercially sustainable.

That does not mean the airport has no value. It does mean we need to be far more careful about claims that its value is so obvious that further public support should simply follow.

If private investors are willing to fund the airport and absorb the commercial risk, then good on them. If regional or central government believes the airport has a role in health, emergency services, or regional resilience, then it should say so and put money on the table.

But the case for saving Kāpiti Airport cannot keep relying on community sentiment, occasional good-news anecdotes, and the hope that someone else will eventually pay for it, especially when other uses for the land may deliver far greater benefits for our community, including some of the health, housing, economic, and resilience outcomes that people assume only the current airport can provide.