Alaska Airlines MileagePlan is running a 40% bonus sale, available to the first 2,500 MileagePlan members who take action. You can buy 10,000 Alaska miles at a time that will come with a 4,000 miles bonus. If 2,500 members don't purchase sale miles by 11:59pm on May 3, the promotion will end then.

Including taxes, you'll pay $295.63 for 14,000 miles, or 2.11 cents per mile. We've seen Alaska miles on sale with as much as a 50% bonus, allowing you to buy them for 1.97 cents each.