At the end of the war, Sir Winston Churchill named A/C Birchall "The Saviour of Ceylon" for his heroic efforts in preventing the British fleet from getting attacked and defeated. He was awarded the Order of the British Empire (OBE) in 1946 for his work in the POW Camp and the Distinguished Flying Cross (DFC) for his efforts in detecting and alerting the allies of the incoming attack on Ceylon. Post War, A/C Birchall served on the Canadian attaché staff in Washington, D.C. and was a member of NATO. He later became the Commandant of RMC in 1963 until he retired from the Canadian Forces in 1967. At this time, he became the Chief Executive and Administrative Officer of the Faculty of Administrative Studies at York University until 1982. When he retired in 1982 he was awarded with an Honorary Degree, Doctor of Law from York University.
A/C Leonard Birchall was awarded the Order of Canada, Member (CM) and was inducted into the Canadian Aviation Hall of Fame in 2001. He was named in 2009 as one of the 100 most influential Canadians in aviation. He sadly passed away on 10 September 2004 in Kingston, Ontario at the age of 89, leaving behind his loving wife, Mrs. Kathleen Birchall. In his memory, The Royal Military Colleges Club of Canada annually present The Birchall Leadership Award, which seeks to carry on a tradition of leadership in his honour. A national award, The Leonard Birchall Scholarship was introduced in his honour; which presents a $10,000 scholarship towards post-secondary education to any Air Cadet that demonstrates academic success and outstanding performance during their time as a cadet.