The toll-free number for Turkish Airlines customer service in the United States is 1-800-874-8875. The customer support call center is staffed 24 hours a day, 7 days a week, according to the Turkish Airlines website.
According to the customer service website gethuman.com, the average wait to speak to a Turkish Airlines representative when calling the toll-free number is 31 minutes. Customers can also use the search feature on the Turkish Airlines website to find the number to the airport office for a particular city in the United States. An online contact form is also available on the airline's main website.