Due to multiple factors, expect to potentially pay more when booking in July. For low rates, February can be a great choice for travel to Wausau. Flights to Wausau from Manchester, New Hampshire in February are about $496 on average during February, but can be found for as low as $306.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Manchester, New Hampshire to Wausau as you normally would.