The 24-year-old signed for the Eagles from Zagłębie Lubin in January and has yet to make his first-team bow, but did feature for Roy Hodgson's side in their pre-season opener against Helsingor as well as appearing in the win at Halmstads.
The two-time capped Polish international will now head to Turkey to play for Caykur Rizespor, who won promotion to the Turkish Superliga last season by winning the second division title.