Weekend changes on the S4 line

Please note that due to modernisation works carried out by PKP PLK on the following dates:

• 20–21 June 2026 (Sat–Sun)
  • 27–28 June 2026 (Sat–Sun)

SKM S4 trains will not operate between Warszawa Służewiec and Piaseczno.

On these days, S4 trains will run on a shortened route: Zegrze Południowe / Wieliszew – Warszawa Służewiec.

Train services between Warszawa Służewiec and Piaseczno will be provided by Koleje Mazowieckie.

During these weekends, on the section Warszawa Zachodnia (platform 9) – Piaseczno, Koleje Mazowieckie will honour:

• single tickets
  • short-term ZTM tickets