Turkish Airlines plans to expand its fleet with an agreement for 75 new long-haul aircraft.
The deal with Boeing for wide-body B787-9 and B787-10 Dreamliners consists of 50 firm orders and 25 options for delivery between 2029 and 2034.
Negotiations between Turkish Airlines and Boeing over the purchase of 100 firm and 50 option orders for the B737-8/10 Max models have also been completed.
Orders for the 737 Max aircraft will be placed subject to the conclusion of ongoing discussions with engine manufacturer CFM International, according to the carrier.
Turkish Airlines aims to expand its fleet beyond 800 aircraft, while increasing the proportion of next-generation types to 90% by 2033 and to 100% by 2035.
This will further strengthen operational efficiency while sustaining an average annual growth rate of 6%.
Turkish Airlines currently operates more than 200 Boeing aircraft.
Expansion of the 787 Dreamliner fleet will strengthen long-haul capabilities, while the 737 Max aircraft will enhance efficiency and flexibility on short- and medium-haul routes.
Chairman Ahmet Bolat said: “This landmark agreement represents much more than a fleet growth. It is a reflection of our leadership in the industry as well as our dedication to innovation and operational excellence.
“The addition of these advanced Boeing aircraft to our fleet will not only enhance our operational capabilities but also become a significant element supporting Turkish Airlines’ 2033 Vision of expanding our fleet to 800 aircraft.
“With this agreement, while advancing our close collaboration with the world’s leading aircraft manufacturers, we will continue to support the development of Turkey’s aviation ecosystem.
"Moreover, by offering greater connectivity and more long-haul destinations, these aircraft will help attract more visitors to discover our country’s unique cultural heritage and natural beauty, thereby further strengthening Turkey’s tourism sector.”
Boeing Commercial Airplanes president and chief executive Stephanie Pope added: “We are honoured that Turkish Airlines has once again chosen the 787 Dreamliner and 737 Max to power its future growth.
"As a proud partner to Turkey and the Turkish aviation industry for 80 years, we look forward to continuing our support of Turkish Airlines as they expand operations and deliver exceptional experiences to their passengers."