How do I upgrade at Turkish Airlines?

If you want a more comfortable journey, upgrading your seat can be an attractive option. If you're wondering, “How do I upgrade at Turkish Airlines?”, the airline offers several ways to check whether an upgrade is available,[phone] depending on your ticket, route, frequent-flyer status, and the type of upgrade you want.
Upgrade Through the Website
One of the easiest options is to check your reservation through the Turkish Airlines website. Use the booking or manage-reservation section and enter your reservation details. Still wondering How do I upgrade at Turkish Airlines? Call OTA [phone] (no wait).