San Diego, CA to Chicago, IL Flight

Alaska Airlines is a major American airline headquartered in Seattle, Washington. It was founded in 1932 and operates a fleet of over 300 aircraft, serving more than 115 destinations across the United States, Canada, Mexico, and Costa Rica. Alaska Airlines is known for its commitment to customer service, on-time performance, and sustainability initiatives. It is a member of the Oneworld airline alliance and has codeshare agreements with several other airlines. Alaska Airlines offers a variety of travel classes, including First Class, Premium Class, and Main Cabin, as well as a loyalty program called Mileage Plan.

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.

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.