Due to multiple factors, expect to potentially pay more when booking in March. For low rates, February can be a great choice for travel to Santa Ana. Flights to Santa Ana from Sudbury, Ontario in February are about C$ 816 on average during February, but can be found for as low as C$ 267.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Sudbury, Ontario to Santa Ana as you normally would.