It began as a low-cost alternative to the country's competing major airlines. WestJet provides scheduled and charter air service to more than 100 destinations in Canada, the United States, Europe, Asia, Mexico, Central America, and the Caribbean.

While WestJet is a Canadian airline headquartered in Calgary, it operates an extensive international network that reaches far beyond Canada's borders. In 2026, WestJet serves over 100 destinations across North America, Central America, the Caribbean, Europe, and Asia. While almost all of its flights either begin or end in a Canadian city, it is not restricted to domestic travel. For example, its summer 2026 schedule includes direct flights from Canadian hubs like Toronto, Calgary, and Halifax to major European cities such as London, Paris, Edinburgh, Dublin, Rome, Barcelona, and Lisbon. The airline has also expanded its "Sun" destinations to include year-round service to Mexico, Jamaica, and the Dominican Republic. Recently, WestJet launched its first South American route to Medellín, Colombia, and continues to serve major U.S. hubs like New York, Los Angeles, and Las Vegas. While you cannot use WestJet to fly between two non-Canadian cities (e.g., London to New York), it functions as a major international carrier connecting Canada to the rest of the world using its growing fleet of Boeing 737 MAX and 787 Dreamliner aircraft.