Largest aircraft by wingspan
Hughes H4 Hercules 'Spruce Goose'
United States (Long Beach Harbor)

The aircraft with the largest wingspan ever constructed is the Hughes H4 Hercules flying boat, more commonly known as the Spruce Goose. The eight-engined 193-tonne aircraft has a wing span of 97.51 m (319 ft 11 in) and a length of 66.65 m (218 ft 8 in). It was raised 21.3 m (70 ft) into the air in a test run of 914 m (3,000 ft) , piloted by Howard Hughes (1905-76), off Long Beach Harbor, California, USA on 2 November 1947, but never flew again.

The Hughes H4 Hercules flying boat largest wingspan of any aircraft.