Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Belfast to Green Bay as you normally would.
For a flight from Belfast 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 per day. 0 airlines have flights to Green Bay Austin-Straubel from Belfast on a regular basis.