Turkish Airlines (IATA code THY, TK) Business class in-flight test Prague - Istanbul, Boeing B737-800, by Travelfirst.com . This is an old configuration cabin, still available in some TK aircrafts. The new cabin is more comfy: re-designed with more leg space and black leather seats. Friendly staff and fabulous food by Turkish DO & Co (featuring Turkish mouth watering specialities, "mezes" and Raki). More in Travelfirst.com