Bush flying refers to aircraft operations carried out in the bush. Bush flying involves operations in rough terrain where there are often no prepared landing strips or runways, frequently necessitating that bush planes be equipped with abnormally large tires, floats, skis or any other equipment necessary for unpaved runway operation. It is the only viable way of delivering people and supplies into more difficult to reach, remote locations.

"The bush" is a term mostly used in the English vernacular of Australia and New Zealand where it is largely synonymous with hinterland or backwoods respectively, referring to a natural undeveloped area. The fauna and flora contained within this area may be mostly indigenous to the region, although exotic species will often also be present.