Due to multiple factors, expect to potentially pay more when booking in March. For low rates, August can be a great choice for travel to Hawaii. Flights to Hawaii from Corpus Christi in August are about $860 on average during August, but can be found for as low as $437.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Corpus Christi to Hawaii as you normally would.