On our long-haul flights (For example New York to Istanbul or Istanbul to Tokyo) you can request a seat at the time of booking for both Business and Economy class, up to 100 days prior departure. On shorter flights (For example Istanbul to London or Jeddah to Istanbul) you can request a seat at the time of booking for Business class, up to 100 days prior departure, and for Economy class within 7 days prior departure. Seats are allocated on a first-come, first-served basis and are subject to availability.