Why would you do that ? It is much better to land in Warsaw.
One would imagine that it's because there is no flight from his local airport to Warsaw. But thanks for your very helpful contribution.
We land in Katowice at 11:05, their is a train to warsaw at 12:50, would we get to train station in that time on the bus or taxi??
That is cutting it a little fine. From memory Katowice airport is about 50km (30 miles) from the city centre, so you'd be wanting to get a tax. Expect to pay between 80zl and 100zl for a taxi (£15 to £18) but make sure you book one in advance (there will almost certainly be a link on the aiport's website).