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 Wausau. Flights to Wausau from Long Beach in August are about $409 on average during August, but can be found for as low as $93.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Long Beach to Wausau as you normally would.