Unlike nearby Armour Heights Field, the airfield was not abandoned at the end of the war, but was acquired for use by the Toronto Flying Club.

During the war, the airstrip became the site of Canada's first delivery of airmail on 24 June 1918 when pilot Brian Peck delivered 120 letters from Montreal (taking off from Bois-Franc Field).

A modern plaque at the site of Leaside Aerodrome reads: "At 10:12 a.m. on 24 June 1918, Captain Brian Peck of the Royal Air Force and mechanic Corporal C.W.

During the war the area to the south, between the airstrip and the former Northern Railway of Canada lines, were intensely developed as Research Enterprises Limited, joining a number of other small industrial firms.

The first short story published by Nobel Prize recipient William Faulkner, Landing in Luck, was likely set at the Leaside Aerodrome.