Alaska Airlines is offering up to a 35% bonus on purchased miles through December 20.

Special offer: up to 35% Bonus 
Purchase miles between November 4 and December 20, 2013 and get up to 35% more miles!
Buy 5,000 – 19,000 miles: get a 20% Bonus
Buy 20,000 – 34,000 miles: get a 30% Bonus
Buy 35000 – 40,000 miles: get a 35% Bonus

At the top bonus band you’re effectively buying miles at ~ 2.2 cents apiece. You can also buy 25,000 Alaska miles at 2.1 cents apiece via Starwood’s point sale though those points won’t post nearly as quickly since they first need to be transferred from Starwood to Alaska.

You can buy up to 40,000 miles per transaction but can make as many purchase transactions as you’d like but make sure to vary your credit cards when making multiple purchases within thirty days as Points.com may see several purchases with the same card as potentially fraudulent. (And since Points.com manages the purchases, these will not earn bonus points for the credit card spending as though it were airfare or travel.)

This is all still quite expensive, but non-crazy to top off an account towards a specific award and it’s also worth noting that — and while I make no warranties about future program changes, there’s certainly been rumors — the value of Alaska miles has shot up this year as they’ve introduced one-way awards and put nearly all of their partners online.

Finally, it’s worth noting that this is hardly an unprecedented offer — three times over the last two years Alaska Airlines has offered a bigger 40% bonus on the purchase of miles.

(HT: Lucky)

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