Best value for points

We're planning a trip to the West Coast this summer. I still have the bonus points that I received when I signed up for Venture X plus the points I've earned. In total I think I have just over 100k points. For this trip we're looking at five round trip tickets plus a rental car. Likely United for the flight and Hertz for the rental car. I planned on booking through the Cap One travel portal and applying the points. The value of the points is just over $1k on the portal. Is there a better way to get more out of the points?