Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Detroit Metropolitan Wayne County Airport to Cali as you normally would.
Due to multiple factors, expect to potentially pay more when booking in December. For low rates, November can be a great choice for travel to Cali. Flights to Cali from Detroit Metropolitan Wayne County Airport in November are about $565 on average during November, but can be found for as low as $234.