Trains run frequently from Poznan to Wroclaw. Journey time is around 2:30, and the ticket price starts from 40PLN (10€).
Trains running on this line are mainly comfortable and fast InterCity trains. The journey last about 2:30h, the ticket cost is approx. 30 PLN (8€). To avoid mistakes, please pay attention to the names of railway stations.
The journey from Cracow to Wroclaw takes about 4:30 hours, and the ticket cost is 45 PLN.
From other European cities:
There is also a possibility to travel to Wrocław by train from Berlin (EuroCity train, change in Poznań) or Budapest, Bratislava, Prague (EuroCity train, change in Dresden).