International trains

There are train services from Turkey to Bulgaria, Romania, Iran and Austria. 

Only Sofia and Tabriz trains run during whole year.

Optima Expres and Bucharest trains run only some periods of year.

The train to Belgrade had run for a short time and then suspended.

Tehran (Transasia) train is currently not running, but is expected to restart running in 2019.

The train which is supposed to run on recently opened Baku-Tbilisi-Kars line is not clear yet.

International trains to/from Turkey 2018

Westbound trains

Sofia Express (Sofia Istanbul train)
Bosphor Express (Bucharest Istanbul train)
Belgrade Istanbul train
Optima Express (Edirne Villach train)

Eastbound trains

Transasia Express (Ankara Tehran train)
Van Tabriz train