I believe America West is now a part of US Airways, but to answer your question they do offer flights to Anchorage Alaska at all times of the day. The flights to Alaska are pretty expensive, though.
Yes, Japan Airlines does offer a 24-hour cancellation policy for its flights.
Alaska Airlines has affiliates from the SkyTeam Alliance and the OneWorld Alliance. American and Delta Airlines are the biggest US Partners. They also have a partnership with Icelandair on flights from the US to Iceland. Horizon Airlines
One can find an airport in Japan by going on Expedia flight which offer flights to and from Japan. One can also contact the international Japanese airport for more information.
No, the Alaska companion fare can only be used for domestic flights within the United States.
Alaska, Horizon, and United currently offer direct flights between the two cities. http://www.portofportland.com/NonStop/Search.aspx
Frontier Flying Service is an Alaska-based airline company. Their main service is in providing commuter flights for people living across Alaska, but they also offer charter service to Canada as well as every US state except Hawaii.
Alaska
Yes, JetBlue does not offer price adjustments for their flights.
The best way to travel from Japan to Okinawa is by taking a flight. There are several airlines that offer direct flights from major cities in Japan to Okinawa, making it a convenient and efficient mode of transportation.
Yes, American Airlines does offer flights from Seattle to Chicago. They offer several flights a day and prices are relatively cheap for such flights, either one-way or round trip.
There are a few airlines that offer flights into Knock, like Ireland West Airport and Skyscanner. Both airlines offer average prices flights into Knock.