San Diego, CA to Toronto Flight

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.

Air Transat is a Canadian airline that operates scheduled and charter flights to over 60 destinations in 25 countries. Founded in 1987, the airline is headquartered in Montreal and is a subsidiary of Transat A.T. Inc. Air Transat operates a fleet of Airbus A310, A321, and A330 aircraft, and offers a range of services including economy and business class seating, in-flight entertainment, and meal service. The airline is known for its focus on leisure travel, with a strong presence in the Canadian and European markets. Air Transat is committed to sustainability and has implemented a number of initiatives to reduce its environmental impact.

Porter Airlines is a regional airline based in Toronto, Canada. It was founded in 2006 and operates flights to various destinations in Canada and the United States. The airline is known for its distinctive brand and high level of customer service, offering amenities such as complimentary snacks and beverages, lounge access, and free Wi-Fi on board. Porter Airlines operates a fleet of Bombardier Q400 turboprop aircraft, which are known for their fuel efficiency and low noise levels. The airline has won numerous awards for its service and has been recognized for its commitment to sustainability and community involvement.

Spirit Airlines is an American ultra-low-cost carrier that operates flights throughout the United States, the Caribbean, Mexico, and Central and South America. The airline was founded in 1983 and is headquartered in Miramar, Florida. Spirit Airlines is known for its low fares and no-frills approach to air travel, with passengers paying extra for amenities such as checked baggage, seat selection, and in-flight refreshments. The airline operates a fleet of Airbus aircraft and has a frequent flyer program called Free Spirit. Despite its low-cost model, Spirit Airlines has faced criticism for its customer service and fees.

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.