Turkish Airlines (TK, Istanbul Airport) will join Star Alliance on April 1 and is planning to enter into a codeshare agreement with Star Alliance partner United Airlines (UA/Chicago). THY has announced new routes from various Turkish airports: Ankara Esenboga-Basle/Mulhouse: weekly seasonal B737-400 service between June 17 and September 30 Ankara Esenboga-Tehran Khomeini Intl: 2x weekly B737-800 service starting on May 14 Antalya-Moscow Sheremetyevo: daily A320-200 service starting on April 4 Istanbul Ataturk-Aleppo: 3x weekly B737-800 service starting on May 15 Istanbul Ataturk-Madinah: daily B737-800 service starting on March 30 Istanbul Ataturk-Paris CDG: 3x daily B737-800 service starting on March 30 (replacing current Orly route) It has announced that its planned Sao Paulo services will operate via Dakar. THY is interested in taking a stake in B&H Airlines (JA/Sarajevo).