To book flights:
Ryanair for flights from London Stansted to Santander
Easyjet for flights to Bilbao or Olviedo

There are also flights from Brussels, Madrid, Alicante, Barcelona

To book a ferry crossing:
Brittany Ferries from Portsmouth or Plymouth to Santander

If you intend to travel on Brittany  Ferries we can arrange a discount.  Please let us know before you book.

There are a number of car hire companies at the airport at Santander:
Europcar    Avis  Solmar