http://www.alaskaair.com/content/tra...tClassUpgrades
Announced in the e-statement today:
We're making it easier for you to upgrade to First Class. Paid Upgrades, starting as low as $50, may be available for customers beginning at 24 hours before departure. If space is available, you can upgrade to First Class when you check in through the Web, at the Kiosk or at an airport ticket counter. Paid upgrades will now be available on all fares including award tickets.