Flights To Warsaw

I live in Bydgoszcz, Poland, and will soon go to Warsaw. I surfed the net and have not had much success with the conclusion airlines flying from Warsaw to Barcelona (where I want to visit). Also, nobody knows what the average cost of flight - back?

There are flights by LOT
http://www.lot.com/default.aspx?_lang=en

Simply select the city and date and get the possible connections from Warsaw to Barcelona.

Do the same on the website of British Airlines:
http://www.britishairways.com/travel/hom ...