Canouan island has the most advanced small island airport ( CIW) in the Grenadines with a recent extension to accommodate larger private aircraft in the high season.
From Barbados:
We would be happy to assist with your travel arrangements with SVGAir or Air Mustique from Barbados to Canouan and return. There is a daily shared flight with SVGAir departing each afternoon or a private charter on the Air Mustique twin turboprop six-seat aircraft . In both cases the airline staff will greet you at landing.
The Cessna Citation jet operated by SVG Air may also be available.
From St Lucia:
The connection is by private charter with the Air Mustique Commander or Islander aircraft or the Cessna Citation jet operated by SVG Air. St Lucia (UVF) airport is a pleasant alternative to fly from/into.
