Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Belfast City Airport to Green Bay as you normally would.
For a flight from Belfast City to Green Bay, you will be flying into Austin-Straubel. Green Bay Austin-Straubel (GRB) is just 5.9 mi from the centre vof the city. Austin-Straubel is the only Green Bay airport and it handles 0 inbound flights from Belfast City per day. 0 airlines have flights to Green Bay Austin-Straubel from Belfast City on a regular basis.