It’s generally more expensive to depart on a Monday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.
Due to multiple factors, expect to potentially pay more when booking in January. For low rates, August can be a great choice for travel to Wilmington. Flights to Wilmington from Richmond in August are about $405 on average during August, but can be found for as low as $234.
When flying from Richmond to Wilmington, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.