Ryanair fly from Stansted to Montpellier,
Perpignan, Nimes and Carcassonne from where you can get to Agde by car or train.
And from Luton to Beziers, which is just 8 miles from the house.. You can get the shuttle
bus from all these airports to the central station, and the train journey to Agde is app. 40 minutes from Montpellier and
1 hour from Perpignan (do check time tables as the train service is not that frequent in the low season).
From Denmark Ryanair fly from Billund to Carcasonne.