No Alaska Airlines (and many airlines) are blocking access from overseas. I have been unable to login from Hong Kong since a few months ago. I have to use a VPN to login now. Not to mention the website has little issues here and there for the past three months! I don't know if it is caused by their upcoming merger with Hawaiian. They are supposed to announce a new joint program next month.

For an airline who aims to fly international, it is weird to restrict access from Asia.

Carfield