How can I upgrade my Turkish airlines ticket? Turkey's national airline is Turkish Airlines, which provides various cabin classes to enhance every traveler's experience. If you've bought a flight ticket and want to upgrade your seat, this post is here to help. Before attempting an upgrade on Turkish Airlines, remember to contact their customer service at +1-800-874-8875 or OTA at +1-800-971-7347 to inquire about upgrading your ticket. https://skyairbus.com/blog/how-can-i-upgrade-my-turkish-airlines-ticket/