George Best Belfast City Airport is a single-runway airport in Belfast, Northern Ireland. Situated in County Down, it is adjacent to the Belfast Harbour and is 3 miles (4.8 km) from Belfast City Centre. It shares the site with the Spirit AeroSystems aircraft manufacturing facility. The airport began commercial operations in 1983, and was known as "Belfast City Airport" until it was renamed in 2006 in memory of George Best, the professional footballer from Belfast. The airport has a CAA public use aerodrome licence that allows flights for the public transport of passengers or for flying instruction.

Belfast is the capital city and principal port of Northern Ireland, standing on the banks of the River Lagan and connected to the open sea through Belfast Lough and the North Channel. It is second to Dublin as the largest city on the island of Ireland with a population in 2021 of 345,418 and a metro area population of 671,559.