Turkish Technic was established in 2006 as a 100%-owned subsidiary of Turkish Airlines, and merged with Turkish Airlines HABOM Inc. in June 2015. With its employees and various affiliate companies, Turkish Technic is among the world's largest aircraft maintenance, repair and overhaul (MRO) centers in the air transport industry. After moving to Istanbul Airport in 2019, Turkish Technic opened the first maintenance hangars of the MRO complex in October 2020. The facility was designed to provide all maintenance, repair and overhaul services from a single point to many domestic and foreign airlines, especially Turkish Airlines, in June 2021. Turkish Technic’s facility is the first and only MRO providing base maintenance service at Istanbul Airport. In order to increase the number of foreign airlines it serves and its market share, Turkish Technic continues its activities in its hangars located at 5 different airports in Ankara, Aydın and Istanbul (Atatürk, Istanbul and Sabiha Gökçen Airports).

The Company was established on 8 December 2020 as a wholly owned subsidiary of Turkish Airlines in order to increase our contribution to the Turkish Aviation ecosystem, by utilizing the existing information technologies human resources more effectively and positioning the existing information technologies applications of our Incorporation as an income generating business line.

The Company was established on 21 June 2012 as a wholly owned subsidiary of Turkish Airlines. Yet to commence operations, it was established to operate Aydın Çıldır Airport, provide aviation training, organize sports-training flights and conduct all activities related to the transportation of passengers with aircraft appropriate to prevailing runway length. The airport is used as a base for Turkish Airlines Flight Academy and since the first half of 2013 provides flight training for Turkish Airlines pilot nominees. 

The Company, which is wholly owned by the Incorporation, was established on 25 September 2018 in order to invest at abroad and domestically, principally in the fields of cargo and courier transportation and in the fields that is specified in the Articles of Association of the Company. The Company represents Turkish Airlines group as a 45% partner of We World Express, which was established in 2019.

The Company was established on 25 March 2021, wholly-owned by the Incorporation, in order to strengthen Incorporation’s position among the most crucial players in the cargo sector, by making the most of Turkish Cargo's unique competitive advantage and create a separate platform for potential strategic foreign partnerships in the future.

The Company was established on 6 March 2023 as a wholly owned subsidiary of Turkish Airlines in order to meet the support service needs of our Incorporation's and subsidiaries' out of core business activities, including but not limited to cleaning, safety, facility management, financial affairs, flight and ground handling services, and operational and organizational services.

The Company was established in order to operate fuel supply facilities within the scope of fuel activities carried out at Istanbul Airport. Turkish Airlines became a 25% shareholder through capital increase. Other partners are Taya Liman İşletmesi A.Ş., Demirören Akaryakıt Sanayi ve Ticaret A.Ş. and Zirve Holding A.Ş. All joint venture companies have same proportion of share.

SunExpress, which was established in 1989 in Antalya with a 50%-50% partnership of Turkish Airlines & Lufthansa, continues its tourism transportation activities as the market leader in flights between Türkiye and Central Europe. SunExpress operated its first flight in 1990, served in the charter market for many years and became the first private airline in Türkiye to operate scheduled international flights between Antalya and Frankfurt that is launched in 2001. SunExpress, which has been serving with a double hub model with Antalya and İzmir, is the airline that connects these two cities to the most destinations with direct and scheduled flights both on domestic and international lines.

Turkish Opet Aviation Fuels, established in 28 September 2009, engages in the domestic and international sale, importation, exportation, distribution, and transport of various petroleum products, chemicals, lubricants, and paints for all kinds of aircraft. The Company commenced operations on 1 July 2010. Kuzey Tankercilik A.Ş. and Güney Tankercilik A.Ş., were established on 1 November 2012, as wholly owned subsidiaries of THY Opet Havacılık Yakıtları A.Ş. in order to provide transportation of petroleum and petroleum products. Turkish OPET provides “into plane” services with its experienced staff at Istanbul Airport also provides storage and aircraft fuel supply services at Sabiha Gökçen Airport.

The Company was established in 26 August 2008 as a wholly owned subsidiary of Turkish Airlines, in order to provide ground-handling services. By signing the articles of association in the framework of the Board Decision dated on 12 March 2009, 50% of shares was transferred to HAVAŞ Havaalanları Yer Hizmetleri A.Ş. On 1 January 2010, the Company began to provide services to Turkish Airlines. TGS has delivered services to more than 200 airlines, Turkish Airlines and SunExpress in particular.

The Company provides aircraft engine maintenance, repair, and overhaul services to customers in Türkiye and its hinterland. Established on 10 October 2008, stakes of %51 and %49 are held respectively by Pratt&Whitney, a subsidiary of United Technologies, and Turkish Technic. Operating out of a maintenance center with an area of around 25,000 m² at Istanbul Sabiha Gökçen International Airport.

Founded in September 2006, commencing operations in 1 January 2007, Turkish DO&CO is a joint venture of Turkish Airlines and DO&CO Restaurants & Catering AG (Austria based company), in which each holds a 50% stake. The Company provides inflight catering services to Turkish Airlines and other domestic and international airlines.

We World Express Limited is a Hong Kong headquartered joint venture company founded in January 2019. Commencing operations in April 2019, the world cargo/courier company provides door-to-door logistics services with a focus on the global e-commerce market. Turkish Airlines International Investment and Transport, a 100%- owned subsidiary of Turkish Airlines, holds a 45% stake, Hong Kong headquartered ZTO Express (Hong Kong) Limited owns a 45% stake and Hong Kong headquartered PAL Air Limited has a 10% stake in the company.

Established in 14 December 2010, the Goodrich Turkish Airlines Technical Service Center is a joint venture of Turkish Technic (40%) and Collins Aerospace (60%). Services for maintenance and repair of aircraft engine nacelles and thrust reversers are provided.

TSI Aviation Seats Inc. (“TSI”) and Cornea Aviation Systems Industry and Commerce Inc. (“Cornea”), which were established for the design, production, marketing and sale of cabin interior products, merged with and into the Turkish Cabin Interior Systems Inc. ("TCI") on 15.02.2023. The company has been established with the stakes of 59.25% Turkish Airlines, 20.84% Turkish Technic, 17% TUSAŞ and 2.91% Havelsan.

The Incorporation established a Republic of Albanian based Joint Venture Company, in order to operate in the field of passenger and cargo transportation. Established on 12 September 2018, the stakes of 49%, 41% and 10% is being held respectively by Turkish Airlines, MDN Investment SHPK, and Albcontrol, which manages Albanian airspace and air traffic, representing Government of Albania.