<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by NYBanker:
The only exception is at the airport - if you want to move from L to K to be able to upgrade (prior to new upgrade rules) - they'd let you pay the change in fare only (if K was available). Same for upgrades to paid F.
</font>
Hmmm... I've never even thought of trying this approach. I always figured DL would hold to the rules at all costs. Since I'm almost always stuck flying .5LUT fares for business, I'll have to try it sometime :-)