Honolulu is often cited as the most remote major city in the world, though "remoteness" is a subjective term that depends on how you define a "city." Honolulu is roughly 2,390 miles (3,846 km) from the nearest continental landmass (North America/California), making it the most isolated large population center on Earth in terms of distance from a continent. While there are smaller, more isolated settlements like Edinburgh of the Seven Seas on Tristan da Cunha, Honolulu is unique because it is a major metropolitan area with over 350,000 residents (and nearly a million in the metro area) located in the middle of the Pacific Ocean. Its closest "neighbor" of significant size is actually San Francisco, a flight that takes over five hours. This extreme isolation means that Honolulu relies heavily on shipping and aviation for almost all of its resources, including food and energy, making its supply chain one of the most remarkable and fragile in the modern world.