There are many websites where are possibilities to find your flatshare. I write the possibilities because somehow it is really hard to find a proper and not overpriced place for foreigners and nowadays even for Czech people. You have to find a tiger in yourself and just rock the world in Prague with finding awesome flatshare!
Why is it so hard? There are many speculations. AIRBNB, Prague’s getting very touristic, people just greedy for money etc… But mainly, I would say it is because there are about 60 % more demands of flats than offers ( I am mostly talking here about these approachable flatshares for Erasmus students). To imagine numbers that I m talking about in August there were around 200 offers and around 500 demands.