Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Sacramento to Democratic Republic of the Congo as you normally would.
Due to multiple factors, expect to potentially pay more when booking in June. For low rates, February can be a great choice for travel to Democratic Republic of the Congo. Flights to Democratic Republic of the Congo from Sacramento in February are about $1,480 on average during February, but can be found for as low as $925.