The train has been operating on the route since 3 September.
The train is linked to the Polish Intercity system, which allows passengers to travel to Warsaw.
Amendments to an agreement on rail transport will allow trains to transport freight in transit through the Etulia - Reni - Giurgiulesti railway section without a three-day stop in Reni.
According to the manufacturer, the Škoda electric trains were planned to be tested in Ukraine.
Regional trains from Sanok to Khyriv last operated in 2010.
The company is currently in the preparatory stage of this process.
Work could begin in the coming months.
The Polish manufacturer of these trains will partially help in repairing them.
It plans to extend the train route to Mukacheve in the future.
The train will soon begin operating on route No. 829 Uzhhorod - Lviv.
According to the company, there is also a clear trend of Ukrainians returning home: 369,000 have traveled out of Ukraine since the beginning of 2023 and 417,000 have traveled in the opposite direction.
The new passenger service may be launched in the autumn, although its launch was previously planned for June.
The company operates services to Przemyśl, where passengers can transfer to trains traveling to Ukraine.
The Hyundai Rotem high-speed train will resume operation on 10 June.
Women's compartments will be test-operated for several months, after which a decision on scaling up will be made.
An SKPL train performed a test trip on the Lublin - Rava-Ruska route in early April.
The company is offering an alternative route from Austria and Hungary to Ukraine.
Poland will need several months to establish customs and border controls after the test operation, after which the date of the launch of regular train services will be announced.
Four trains will be sent to Ukraine by the summer and an additional 8 during the year.
The trains operated on the Helsinki - St. Petersburg route in 2010 and are suitable for Ukraine’s rail tracks.