K class is upgradable. If you lost your Delta elite status and are FF(non-elite), then you can only request your upgrades at the gate. If seats are available at that time, you can use your left over MSUs to upgrade (if you still have any).

------------------
Carl Seppanen - UpgradeBuddy.com- Administrator

[This message has been edited by CarlS (edited 10-01-2003).]