JetBlue Airways doesn't have a physical, staffed office in Istanbul for public walk-ins they operate through their website, app, and partner airlines like Turkish Airlines for connecting flights, with customer support available 24/7 via their contact number for bookings and issues, particularly for flights to/from the U.S. and Europe. You'll need to manage bookings online or contact their main support for any help with their routes, including potential connections via Istanbul.
