Alaska Airlines is not part of any global airline alliance, but has ties with many airlines for earning and redeeming miles.
Alaska Airlines has just started a new sale of buying and gifting Mileage Plan miles and getting up to 40% bonus in the process.
You can access Alaska’s web page for buying and gifting miles here.
The price of an Alaska Airlines miles under this offer is 2.1 cents each.
This could be a good way to bump up the balance and then redeem for premium class on Emirates. Personally, I would rather buy miles from an airline that is in an alliance such as AA or US that would allow spending options.