Bumping this...I have the same issue: have a corporate rate from my employer that is authorized for personal use. Need a one-way. It's ~$350 cheaper than without the code for a three day, but with zero miles. Trying different car classes didn't seem to fix the issue.

Any suggestions on "stackable" codes/coupons to make the rental more palatable? As it is, at $0.4/mile, my trip will actually be marginally more expensive than going with hertz (not national) on a one-way with no corporate code.

thanks in advance,

tb