Boundary Bay Airport (IATA: YDT, ICAO: CZBB) is a general aviation airport located in Delta, British Columbia, Canada, situated near the US–Canada border south of Vancouver. It serves private pilots, flight training schools, and corporate aviation rather than scheduled commercial airline service. The airport is one of Canada's busiest general aviation fields by aircraft movements, owing to the high concentration of flight training operations based there. It features multiple runways and supports a wide range of piston, turboprop, and light jet aircraft. Transport Canada classifies Boundary Bay as a certified aerodrome. Its proximity to the US border and the Vancouver metropolitan area makes it a strategically convenient facility for cross-border general aviation traffic and local pilot training.