In 1951, Agar’s company, now named Okanagan Helicopters limited, received a contract to assist the survey work being performed by the Aluminium Company of Canada at Kitimat, British Columbia. The work took weeks to complete, but without the support of helicopters, it would have carried on for years.

The headquarters of Okanagan Helicopters eventually moved to Vancouver and became one of the largest commercial helicopter companies in the world.

Agar was given many honours for his achievements. These included the Trans-Canada (McKee) Trophy in 1950, and the William J. Kossler Trophy presented by the American Helicopter Society, marking the first time the recipient was outside the United States. The American Helicopter Society gave Agar an Honorary Fellowship in 1959 and the Helicopter Association of America honoured Agar in 1963.

In 1962, Agar retired as president of Okanagan Helicopters and died in Victoria, British Columbia on 27 January 1968.