Flight Toronto - St Louis, MO prices from $204.49

Air Canada is the largest airline in Canada, providing scheduled and charter air transportation for passengers and cargo to over 200 destinations worldwide. The airline operates a fleet of over 400 aircraft, including narrow-body and wide-body jets, and serves both domestic and international routes. Air Canada is a member of the Star Alliance, a global airline network that provides passengers with access to over 1,000 destinations in 190 countries. The airline offers a range of services, including in-flight entertainment, Wi-Fi, and a loyalty program called Aeroplan. Air Canada is headquartered in Montreal, Quebec, and has hubs in Toronto, Vancouver, and Calgary.

British Airways is the flag carrier airline of the United Kingdom, headquartered in London. It is one of the largest airlines in Europe and operates flights to over 180 destinations worldwide. The airline was founded in 1974 and has since grown to become a major player in the aviation industry. British Airways is known for its high-quality service, comfortable seating, and extensive route network. The airline operates a fleet of over 250 aircraft, including the Airbus A380 and Boeing 787 Dreamliner. British Airways is a member of the Oneworld airline alliance and has codeshare agreements with several other airlines.

Lufthansa is a German airline and one of the largest airlines in Europe. It was founded in 1953 and operates flights to over 200 destinations worldwide. Lufthansa is a member of the Star Alliance, which is the world's largest airline alliance. The airline has a fleet of over 300 aircraft, including Airbus and Boeing planes. Lufthansa offers a range of services to its passengers, including in-flight entertainment, Wi-Fi, and a frequent flyer program called Miles & More. The airline is known for its high-quality service and has won numerous awards for its customer satisfaction and safety standards.

United Airlines is a major American airline headquartered in Chicago, Illinois. It is one of the world's largest airlines, operating a comprehensive domestic and international network of flights. United Airlines operates a fleet of over 800 aircraft, serving more than 350 destinations in over 50 countries. The airline is a founding member of the Star Alliance, which is the world's largest airline alliance. United Airlines offers a range of services to its passengers, including in-flight entertainment, Wi-Fi, and a loyalty program called MileagePlus. The airline has a strong commitment to sustainability and has implemented various initiatives to reduce its environmental impact.

Sun Country Airlines is a low-cost American airline headquartered in Minneapolis, Minnesota. It was founded in 1982 and operates scheduled and charter flights to destinations across the United States, Mexico, Central America, and the Caribbean. Sun Country Airline's fleet consists of Boeing 737-800 and 737-700 aircraft, and it offers a variety of services including in-flight entertainment, Wi-Fi, and food and beverage options for purchase. The airline has a reputation for providing affordable fares and friendly service, making it a popular choice for leisure travelers. Sun Country Airlines is committed to safety, sustainability, and customer satisfaction.