Turkish Airlines has a presence at Stockholm Arlanda Airport (ARN) for flight operations, located at Arlanda Flygplats, but for general inquiries or bookings, use their official website or call center, as they focus on digital/phone support rather than a large physical city office. For specific airport help, you'll find them at Arlanda; for booking or issues, use turkishairlines.com/en-int/any-questions/get-in-touch/ Turkish Airlines website for contact options.