Flight Kassel - Madrid prices from $135.07

Air Europa is a Spanish airline that was founded in 1986. It is a member of the SkyTeam alliance and operates flights to over 50 destinations across Europe, the Americas, Africa, and Asia. The airline's main hub is located at Adolfo Suárez Madrid–Barajas Airport, and it also has secondary hubs at Palma de Mallorca Airport and Tenerife North Airport. Air Europa operates a fleet of over 50 aircraft, including Boeing 787 Dreamliners, Airbus A330s, and Embraer E195s. The airline offers a range of services to its passengers, including in-flight entertainment, Wi-Fi, and a loyalty program called SUMA.

Brussels Airlines is the flag carrier airline of Belgium, headquartered in Brussels. It operates flights to over 100 destinations in Europe, Africa, North America, and Asia. The airline was founded in 2006 and is a member of the Star Alliance. Brussels Airlines is known for its high-quality service, modern fleet, and commitment to sustainability. It offers a range of travel classes, including Economy, Business, and Premium Economy. The airline also has a loyalty program called Miles & More, which allows passengers to earn and redeem miles for flights, upgrades, and other rewards. Brussels Airlines is a subsidiary of Lufthansa Group.

Corendon Airlines is a Turkish leisure airline that was founded in 2004. The airline operates flights to various destinations in Europe, Africa, and Asia, with a focus on holiday destinations. Corendon Airlines has a fleet of modern aircraft, including Boeing 737-800 and Airbus A320 planes. The airline offers a range of services to its passengers, including in-flight meals, entertainment, and comfortable seating. Corendon Airlines is committed to providing safe and reliable air travel, and has received numerous awards for its high standards of service. The airline is part of the Corendon Group, which also includes a tour operator and several hotels.

Freebird Airlines is a Turkish charter airline that was founded in 2000. The airline operates flights to various destinations in Europe, Asia, and Africa. Freebird Airlines has a fleet of Airbus A320 and A321 aircraft, which are configured with both economy and business class seating. The airline offers a range of in-flight services, including meals, drinks, and entertainment. Freebird Airlines is known for its affordable fares and reliable service, making it a popular choice for travelers looking for a budget-friendly option. The airline is headquartered in Istanbul and operates flights from several airports in Turkey.

Pegasus Airlines is a low-cost airline based in Turkey. It was founded in 1990 and began operations in 2005. The airline operates flights to over 100 destinations in 40 countries, primarily in Europe, the Middle East, and Asia. Pegasus Airlines has a fleet of over 80 aircraft, consisting of Airbus A320s and Boeing 737s. The airline offers a range of services, including online check-in, in-flight meals, and a loyalty program. Pegasus Airlines is known for its affordable fares and has won several awards for its customer service and operational efficiency.

Southwind Airlines was a regional airline based in Topeka, Kansas, that operated from 1993 to 1997. The airline primarily served smaller cities in the Midwest and South, with a fleet of Embraer EMB 120 Brasilia turboprop aircraft. Southwind Airlines was known for its low fares and no-frills service, with a focus on providing affordable air travel to underserved markets. However, the airline struggled financially and ultimately filed for bankruptcy in 1997, ceasing all operations. Today, Southwind Airlines is no longer in operation, but its legacy lives on as an example of the challenges faced by regional airlines in the highly competitive aviation industry.

Tailwind Airlines is a Turkish charter airline that was founded in 2009. The airline operates flights to various destinations in Europe, Asia, and Africa. It has a fleet of modern aircraft, including Airbus A320s and Boeing 737s. Tailwind Airlines offers a range of services to its passengers, including in-flight entertainment, meals, and beverages. The airline has a strong focus on safety and has received various certifications and awards for its safety standards. Tailwind Airlines aims to provide its passengers with a comfortable and enjoyable flying experience at an affordable price.

Turkish Airlines is the national flag carrier airline of Turkey, headquartered in Istanbul. It operates scheduled flights to over 300 destinations in Europe, Asia, Africa, and the Americas, making it one of the largest airlines in the world by number of destinations served. Turkish Airlines has won numerous awards for its service, including "Best Airline in Europe" six years in a row from 2011 to 2016. The airline operates a modern fleet of over 350 aircraft, including Airbus A320s, A330s, A340s, A350s, and Boeing 737s, 777s, and 787s. Turkish Airlines is a member of the Star Alliance, the world's largest airline alliance.