Alaska Airlines is not part of any global airline alliance, but has ties with many airlines for earning and redeeming miles.
Alaska Airlines has launched Mileage Plan miles sale at up to 40% bonus that is valid until March 31, 2016.
You can access Alaska’s web page for buying and gifting miles here.
Note that Alaska Airlines doesn’t limit the number of miles that you can purchase over calendar year. They merely have 60,000 miles limit before bonus per transaction (used to be 40K).
The price of an Alaska Airlines miles purchased at the max bonus level is 2.11 cents each.
This could be a good way to bump up the balance and then redeem for premium class trip on Emirates or Cathay Pacific.
Alaska doesn’t limit the number of miles that you can buy over a calendar year or promotional period like many of the other airlines do (some use these miles exclusively for Emirates awards).