Due to multiple factors, expect to potentially pay more when booking in July. For low rates, August can be a great choice for travel to Europe. Flights to Europe from Bangor, Maine in August are about $1,231 on average during August, but can be found for as low as $829.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Bangor, Maine to Europe as you normally would.