You have a choice of Airports for Cabo Roig, you can choose to fly into Murcia (San Javier - SJV), or Alicante (El Altet International - ALI). Muricia in only short 20 minute drive away and Alicante, not much further, appx. 40 minutes.
Should you be driving from Alicante you would firstly pass through the salt lakes of Torrevieja, also a bird sanctury for Pink Flamingos. You could then take the beautiful coastal road (N332) which has stunning views of the areas white sandy beaches and the Mediterranean.