Thai Airways International (TG, Bangkok Suvarnabhumi) is set to terminate its Bangkok Suvarnabhumi-Koh Samui service on September 2, 2018, thus marking the end of narrowbody operations for the mainline unit of the carrier, Routesonline has reported.

The Thai flag carrier currently operates the route 14x weekly with its last remaining narrowbody jet, a B737-400 HS-TDG (msn 26614). Following the termination of the flights, the 25-year-old Boeing twinjet will most likely be retired.

Thai Airways will continue to code-share with Bangkok Airways on the route, which connects the island in the Gulf of Thailand with the country's main gateway 134x weekly. Bangkok Airways owns and operates Koh Samui airport.

It is recalled that Thai Airways temporarily suspended its service to Koh Samui in January 2018 given its last remaining B737-400 required maintenance. The airport's runway is 2,060-metre-long and cannot support widebody operations.

According to the ch-aviation fleets module, besides the sole B737-400, Thai Airways operates exclusively widebody jets, namely fifteen A330-300s, twelve A350-900s, six A380-800s, nine B747-400s, six B777-200s, six B777-200(ER)s, six B777-300s, fourteen B777-300(ER)s, six B787-8s, and two B787-9s.

Besides HS-TDG, the carrier owns two more B737-400s, HS-TDD (msn 26611) and HS-TDF (msn 26613), which have been stored at Utapao and Bangkok Suvarnabhumi since January and August 2017, respectively.