Flight Thessaloniki - Odorheiu Secuiesc prices from €93.55

Aegean Airlines is the largest airline in Greece, operating both domestic and international flights to over 150 destinations. Founded in 1987, the airline has grown to become a major player in the European aviation market, with a fleet of over 60 aircraft and a reputation for high-quality service. Aegean Airlines is a member of the Star Alliance, a global airline network that includes some of the world's largest carriers. The airline has won numerous awards for its customer service, including the Skytrax award for Best Regional Airline in Europe for nine consecutive years.

Air Serbia is the national airline of Serbia, headquartered in Belgrade. It was founded in 2013 as a successor to the former national carrier, Jat Airways. Air Serbia operates flights to over 50 destinations in Europe, the Middle East, and North America, with a fleet of modern Airbus aircraft. The airline offers a range of services to its passengers, including in-flight entertainment, Wi-Fi, and a loyalty program called Etihad Guest. Air Serbia is a member of the Etihad Airways Partners group, which includes several other airlines around the world. The airline has won several awards for its service and performance, including Best Airline in Eastern Europe at the World Airline Awards.

Austrian Airlines is the flag carrier airline of Austria, headquartered in Vienna. It operates scheduled services to over 130 destinations worldwide, including Europe, North America, Asia, and Africa. The airline is a member of the Star Alliance and has a fleet of over 80 aircraft, including Airbus A320, A321, A319, Boeing 767, and 777. Austrian Airlines offers a range of travel classes, including Economy, Premium Economy, and Business Class, with a focus on providing a high level of service and comfort to its passengers. The airline has won numerous awards for its customer service, including Best Airline Staff in Europe and Best Business Class Catering.

Blue Air is a Romanian low-cost airline that was founded in 2004. It operates flights to over 100 destinations in Europe, Africa, and the Middle East. The airline's main hub is located at Henri Coandă International Airport in Bucharest, Romania. Blue Air's fleet consists of Boeing 737 and Airbus A320 aircraft, and it offers both economy and business class seating options. The airline is known for its affordable fares and has won several awards for its customer service. Blue Air is committed to sustainability and has implemented various initiatives to reduce its environmental impact, such as using biofuels and reducing single-use plastics on board.

Emerald Airlines is a proposed Irish regional airline that plans to operate flights within Ireland and to destinations in the UK and Europe. The airline is currently in the process of obtaining an Air Operator's Certificate (AOC) from the Irish Aviation Authority (IAA) and hopes to launch operations in 2022. Emerald Airlines plans to operate a fleet of ATR turboprop aircraft and aims to provide a high-quality, reliable, and affordable service to its customers. The airline is backed by Conor McCarthy, the founder of Dublin Aerospace, and has received investment from a number of Irish businesspeople.

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.

Wizz Air is a low-cost airline based in Hungary that operates flights to destinations across Europe, the Middle East, and North Africa. Founded in 2003, the airline has grown rapidly and now operates a fleet of over 100 aircraft, serving more than 150 destinations in 44 countries. Wizz Air is known for its no-frills approach to air travel, offering low fares and charging extra for additional services such as checked baggage and in-flight meals. The airline has a strong focus on efficiency and cost control, allowing it to offer some of the lowest fares in the industry.