WestJet Airlines Ltd. (TSX: WJA) is a major Canadian low-cost carrier that provides scheduled and charter air service to 81 destinations in Canada, the United States, Mexico, Central America and the Caribbean.

Founded in 1996, it is currently the second-largest Canadian air carrier, behind Air Canada, operating an average of 425 flights and carrying over 45,000 passengers per day.

In 2012, WestJet carried over 17 million passengers, making it the ninth-largest airline in North America by passengers carried.

WestJet is a public company with over 9,000 employees, is non-unionized and is not part of any airline alliance. It operates variants of a single aircraft type, all from the Boeing 737 Next Generation family. The airline has its headquarters and main hub at Calgary International Airport, with another large hub at Toronto Pearson International Airport.

WestJet had passenger revenues of $2.6 billion (CAD) in 2010.

Like Southwest Airlines, Westjet uses a fleet of only 737s; this includes the -600, -700, and -800 series.