Due to multiple factors, expect to potentially pay more when booking in September. For low rates, August can be a great choice for travel to South Dakota. Flights to South Dakota from Bakersfield in August are about $425 on average during August, but can be found for as low as $225.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Bakersfield to South Dakota as you normally would.