I am travelling to Gdansk form Brussels via London with Ryanair
thats like going backwards at coming forwards there ... :D
Try the Lot website ...
To me that looks like 116pln one way might i add say to fly on the 22nd feb just to give you an idea of costs ...
116pln at todays rates works out at approx £24 one way
there may be other airlines like wizzair doing internal flights ... wait for some other help form members
but this site might help you out as well: farecompare.com/flights/Poland-PL/country.html