Due to multiple factors, expect to potentially pay more when booking in January. For low rates, July can be a great choice for travel to Plattsburgh. Flights to Plattsburgh from White Plains in July are about $228 on average during July, but can be found for as low as $101.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from White Plains to Plattsburgh as you normally would.