I have a one way Southwest frequent flyer award that I must use. However, I am finding it very expensive to get to Little Rock or Nashville airports.

Car rental are about $175 one way on a variety of companies. Bettie Bus shuttle to LIT is $175 ($100 per person if you have a group of 3). Car rental to BNA is similarly expensive.

It looks like $25 Greyhound then a taxi from North Little Rock is the cheapest.

Do you know of a cheaper car rental (having looked up Avis, Hertz, National, Budget)? Any other way to go?

Is there a Delta throwaway ticket (MEM-LIT-somewhere else)? I don't think so.