Andrewes was a Fellow of Pembroke College, Oxford, between 1933 and 1946, and of New College, Oxford, from 1946 to 1953. He was Wykeham Professor of Ancient History from 1953 until his retirement in 1977.
He died in 1990, the day after his 80th birthday.
On 4 January 1945, Andrewes was appointed Member of the military division of the Order of the British Empire (MBE) 'in recognition of gallant and distinguished service in the field'. He was elected a Fellow of the British Academy in 1957.
- The Greek tyrants (1956)
- The Greeks (1967); later republished as Greek society