Oslo Torp springs to mind - a financial nightmare travelling from the airport to the centre of Oslo. If memory serves me correct about 20-25 euro each way on the bus ?? SAS may even work out cheaper than this
In all fairness... as if transportation from the "real" airports is free. Seriously, 10eu from Linate/Malpensa or 10eu from Bergamo - couldn't care less. Same story for pretty much every other place. The only airport that does save you money on "city centre" travel is LCY