The QEEQ website didn't list Katowice airport as a drop-off location, but thankfully the staff allowed us to return the car there when we picked it up, saving us a lot of trouble! However, I strongly advise against renting a car to travel from here to Warsaw in Poland; the road conditions are terrible. Also, the pick-up point stated that they operate until 9 PM, but we arrived a little after 9 PM and fortunately, someone was still there. Otherwise, we wouldn't have known what to do.