Mount Cook Airport sits at 645 metres above sea level on the terminal moraine plain of the Tasman Glacier, positioning it as New Zealand's highest aerodrome and the only commercial base within Aoraki/Mount Cook National Park. The airstrip was carved from glacial outwash in 1971 specifically to serve ski-plane operations onto the névé, the compacted snow fields above 2,400 metres where wheeled aircraft can land on prepared surfaces throughout the southern summer. The combination of fixed-wing ski planes and helicopters emerged in the 1990s when operators recognised that each platform reveals distinct alpine geography: ski planes achieve altitude efficiently and cover the 27-kilometre length of the Tasman Glacier in minutes, while helicopters manoeuvre into narrow valleys and deposit passengers onto ice shelves inaccessible to fixed-wing craft. The Mount Cook ski plane and helicopter glacier combo flight capitalises on this dual capability. Ski planes typically climb to 3,050 metres, circling the summits of Aoraki/Mount Cook (3,724m), Mount Tasman (3,497m), and the dozen glaciers that radiate from the Main Divide. The Tasman, New Zealand's longest glacier at 23 kilometres, loses an average of 180 metres of terminus length annually, a retreat documented since systematic measurement began in 1973. Helicopters then descend into the accumulation zone where annual snowfall exceeds melt, landing on consolidated névé marked by survey poles and inspected daily for crevasse movement. Passengers disembark at approximately 2,700 metres for ten to fifteen minutes, standing on ice layers that may be decades or centuries old depending on flow rates. Aoraki/Mount Cook National Park protects 707 square kilometres of the Southern Alps, a range still rising at 7 millimetres per year due to tectonic collision between the Pacific and Australian plates. The park's 140 peaks above 2,000 metres create New Zealand's largest icefield outside Fiordland, with 72 named glaciers draining east and west. Weather stability is highest between November and March, when westerly airflows weaken and the alpine ridgeline blocks moisture. Morning departures between eight and ten o'clock secure the calmest air and the low-angle light that defines crevasse fields and ice seracs in sharp relief, conditions that deteriorate as thermal convection builds through midday.