Hewitt was named an Officer of the Order of the British Empire (OBE) on June 17, 2006 and Gramophone Artist of the Year in 2006. She received the MIDEM Classical Award for Instrumentalist of the Year in 2010, and was awarded the first ever BBC Radio 3 Listener's Award (Royal Philharmonic Society Awards) in 2003. She is also a fellow of the Royal Society of Canada, and has honorary degrees from the University of Ottawa, the University of Toronto, Queen's University (Kingston), The Open University (Milton Keynes, UK), Mount Saint Vincent University (Halifax), the University of Saskatchewan and Carleton University (Ottawa).