Airlines fly routes that they can make money on. It's just that simple. If there aren't enough people that want to fly between two cities, or if another airline is already flying the route and there is no room for expansion, an airline isn't going to fly that route. It's basic economics.
Best answer: Airlines fly routes that they can make money on. It's just that simple. If there aren't enough people that want to fly between two cities, or if another airline is already flying the route and there is no room for expansion, an airline isn't going to fly that route. It's basic economics.
Alaska Airlines (not Alaskan Airlines) flies plenty of flights between Anchorage and several cities in Hawaii, especially in the winter when Alaskans want to get away from the cold.
Juneau is a city of just over 30,000 people. Honestly, Juneau is lucky to get any jet service and the only reason it has the flights it does to Anchorage and Seattle is that planes and ferries are the only ways into and out of the city.
Both Alaska and Hawaiian are relatively small airlines with limited routes. Alaska is mostly focused on the west coast and the state of Alaska. Hawaiian is hubbed out of Honolulu and focuses on flights to, from, and within Hawaii. Neither one has a hub in Memphis or NY, so that's why they don't fly that route. Most US airlines operate on a hub and spoke system. Southwest is really the only US airline that will fly between two random cities.
Hilo is not the principal airport for the island of Hawaii anymore. There isn't much on that part of the island anyway. It's pretty well explained here why that airport doesn't see much traffic: https://en.wikipedia.org/wiki/Hilo_International_Airport
You might want to re-check your stats on HNL. Besides Hawaiian, United and Delta also have international flights out of there. So, two out of the big three US airlines fly international routes from there.
As for ANC, it used to be a big stopping point for flights to and from Asia during the cold war. Now that flights can go over Russia and planes are capable of flying longer non-stop routes, they don't have to stop there for gas anymore. Again, your facts are wrong. There ARE international flights out of there. Condor flies to Frankfort in the summer and Icelandair flies to Reykjavick in the summer. Air Canada has seasonal flights to Vancouver and Yakutia has seasonal flights to Russia. There are also some charters from Japan in the winter. Also, Alaska Airlines has exactly ZERO international flights out of ANC. Anchorage only has about 300,000 people. That's not exactly a huge market. There simply isn't enough demand for more a bunch of international flights.