Do you not heve Google in Wales? Presuming not, CAL is Campbeltown. It's a similar distance from Ayr (which is on PIKs doorstep) to both GLA and CAL. Despite this I doubt many, if anyone at all from Ayr uses CAL. Hence geography not being the only factor.
Foget distance in miles. It's somewhat irrelevant. Distance in terms of journey time is far more important.
A question to the Cardiff fans. What is your expectation for Cardiff in terms of passenger numbers? Do you see CWL as a 500k airport? 1 million? 2 million pax? More? Genuine question. Thanks.