While you cannot see both islands in such a short window, you can certainly "do" a high-impact 5-day itinerary focused on just one region. For the North Island, a popular 5-day loop starts in Auckland, taking you to the magical Waitomo Glowworm Caves, the geothermal wonders of Rotorua, and the Hobbiton Movie Set. For the South Island, a 5-day "Adrenaline & Scenery" trip usually anchors in Queenstown, allowing for a day trip to the breathtaking Milford Sound, a visit to the historic Arrowtown, and a scenic drive to the turquoise waters of Lake Tekapo or Mt. Cook. In 2026, internal flights between Auckland and Queenstown make it technically possible to see both cities, but you would spend more time in airports than enjoying the landscape. Five days is perfect for a deep dive into one specific "island highlight," but it will leave you wanting much more of the "Land of the Long White Cloud" for a future, longer visit.