It was introduced on 2 January 1922 with sleeping cars, double-headed by two E-class locomotives, and ran every Monday (increased to twice a week, Wednesday and Saturday, by 1930) from Bangkok Noi railway station (now Thon Buri railway station).

The destruction of the Rama VI Bridge had compelled State Railway of Thailand (SRT) (replaced Royal State Railways (RSR) from 16 August 1939 to 1945) to use Thon Buri (Bangkok Noi) as the terminal for the International Express and the Hat Yai Express from 2 January 1944.

The Hat Yai Express (Bangkok - Hat Yai) was substituted during the reduction of international service as well as during the suspension of international services even though it was introduced on 3 April 1939 (every Friday) to meet increasing demand from those who lived in southern provinces.

The international service was resumed on the old schedule on 2 January 1954 after concluding a cross border treaty between SRT and the Federated Malay States Railways (FMSR).

Between Bangkok and Hat Yai, the Train is Coupled at the South End of Special Express No.

[2] The train passes cities and towns along the eastern gulf coast of southern Thailand on the upper Malay Peninsula.

These include Nakhon Pathom, Hua Hin, Surat Thani, Hat Yai.