If you have Hawaiian Airlines HawaiianMiles and haven’t earned or redeemed any miles in the past year and a half, you will need to act fast to avoid losing all of the miles in your account. Hawaiian Airlines is shortening its mileage expiration from 36 months to 18 months, effective June 1, 2009. If you have not had any activity from Nov. 30, 2007 to May 31, 2009, all of your accumulated miles will expire on June 1, 2009. If you have earned miles during that time, your miles will expire 18 months from the date of your last activity.

A cheap and easy way to earn miles is to purchase songs at iTunes through the HawaiianMiles online mall. Songs start at $.99 and you can earn two miles per dollar spent. Be aware that it may take four to six weeks for the miles from shopping transactions to appear in your account so if you need the miles to post quickly, you may need to choose another activity. You can also purchase a few miles to save them all from expiring–a minimum of 500 miles can be purchased for $16.13 (including taxes and fees). If you don’t want to spend any money, you can redeem miles for newspapers or magazines, starting at 400 miles for an annual subscription to American Legacy.