Except for you are not accounting for wear and tear on your car. Flightcar pays $0.05 per mile from SFO and says that the average daily mileage is less than 40.

Except for you are not accounting for wear and tear on your car. Flightcar pays $0.05 per mile from SFO and says that the average daily mileage is less than 40. So let's say your car is rented for 40 miles a day, that's a whopping $2 you made. The biggest value comes from saving on parking which I think makes sense for some folks who might have to drive to the airport but I would think that anytime you are traveling more than a few days, a shuttle/uber/bus is a much better option.