In 1960, Thai Airways International split from Thai Airways Company. Following the split, Thai Airways International started using "dancing man" logo began in 1960 which was designed by Prince Kraisingh Vudhijaya. It depicts a traditional Thai dancer.
The font was also used by Scandinavian Airlines System, who co-owned the airline at the time. Early liveries were also very similar to the ones uses by SAS.
In the mid-1970s, Thai was expanding and needed a new corporate image. A new identity was developed by Landor Associates of San Francisco. The entire identity used gold, purple and magenta, and was inspired by Thai culture.
Italicized symbol which printed on vertical stabilizer.
An updated identity was introduced in April 2005. It had been developed with Interbrand. Its color was changed from magenta to purple/violet and the wordmark is written in all caps.
In 2018, like most Airlines around the world at this time, Thai Airways the flattened variant logo become the primary logo following they received their first Boeing 787-9 and introduced the new safety video. However, the original 3D logo is still in use as a secondary logo.
Original primary logo before 2018, still in use today.