Depending on your schedule and where you currently are, they might have some other options for you.
For example, one time I rented in Utah, but then realized I needed to return in a different state.
The car I initially had was going to be $1,000 more for a different drop off. But they let me go back to the original location and switch to a different car that was only $100 more.
These companies have computers that tell them where the cars need to be, and when. So let them help you figure out a solution.
Unexpectedly showing up hundreds of miles away is going to cost you.