Royal Air Force Upavon, or more simply RAF Upavon, is a former Royal Air Force station in Wiltshire, England. It was a grass airfield, military flight training school, and administrative headquarters of the Royal Air Force. The station opened in 1912 and closed in 1993, when it was transferred to the British Army and became known as Trenchard Lines.

The station motto was In Principio Et Semper, and translated from Latin means "In the Beginning and Always".