Winchester Airport (TC LID: CNA8) was located 3 NM (5.6 km; 3.5 mi) south of Winchester, Ontario, Canada, south of Ottawa. The airport had two runways, one paved and one grass.

The aerodrome was permanently closed as of May 15, 2012. The NOTAM entry published by NAV Canada reads: CNA8 WEF 2012 MAY 15 0401 AMEND PUB: AD PERM CLSD

The paved runway appears to have been removed, but hangar and other buildings remain on site after the closure.