Driving sensibly, it will take roughly 90mins to get from NQY to EXT on a typical winters day. Add 30mins for the summer season.
On the horizon there are two interesting developments which may have a bearing on Newquay. Firstly is the sheer amount of building which has been pencilled in for the aforesaid sceptic spot on the backside of Cornwall plus in the Truro area and secondly the CC have eurowads to spend on the railway infrastructure. Whereas, prima facie the latter doesn't seem to have that much bearing on the airport's future, if the most "sexy" option of the various which are being discussed is acted upon (reinstating the link across the 'Moor from St.Austell) then airport will become a lot more attractive to those travelling by public transport.