You can obtain information on train times at railway stations at the office marked 'I' (Information), or from timetables displayed at the railway station - most of them are displayed on screens, bilingual and easy to follow.
Train timetables on the Internet
Intercity (fastest) train tickets can be booked on: www.intercity.pl/en/
Information on all other trains is available on: rozklad-pkp.pl/en
Duration
If you are planning a train trip make sure to check your arrival time, whether you have to change trains, and if there is a restaurant car on the train. It may be important to check the length of time of your journey - regional trains can take as much as twice the time to cover the same distance.
Typical journey times of Intercity trains:
Warsaw - Krakow - 2:20
Warsaw - Gdansk - 2:50
Warsaw - Wroclaw - 3:50
Warsaw - Poznan - 3:20
Gdansk - Krakow - 5:20