That's correct. Seventy-five per cent of the population live in the North Island, well into the southern point of that island, so the vast majority of members also live there, and they do fly. Auckland is the most popular city, with a quarter of the country's population, so it has a large number of MPs, and almost all of them, except perhaps eight to 10 members based in Wellington, would fly in, and then the locally based ones would drive.
On May 17th, 2016. See this statement in context.