How to Use Southwest Points for Car Rental is a common question among travelers using Southwest Airlines. Southwest Rapid Rewards points are primarily used for booking flights, but they can also be redeemed for car rentals through the airline’s travel partners. By booking via the Southwest website, passengers can use points or earn additional rewards when reserving rental cars with partner companies. Availability and redemption value may vary depending on the provider and location. This option offers added flexibility for travelers looking to maximize their points beyond airfare.