Air Adelphi is a certified airline that emerged from the need for sustainable air travel between Mustique and other regional islands in the Grenadines. Established as a fully-fledged commercial carrier in 2022, the company operates a fleet of five DeHavilland Twin Otter aircraft, specifically chosen for their capability to land on challenging short strips. This aviation service caters to the growing demand of visitors to Mustique, connecting them seamlessly with neighboring islands.

Founded in 2018 as the maintenance arm of its parent company, Air Adelphi has emphasized recruitment from St. Vincent, ensuring that many of its pilots and engineers hail from the local community. This family-oriented approach extends from the Director of Operations to janitorial staff, creating a cohesive team dedicated to safety and service. With recent improvements to their fleet, including new interiors and cockpit upgrades completed in Canada, Air Adelphi is committed to providing efficient and high-quality air transport solutions across the region.