(2-part post):
Sorry, but you won't find any flights with Ryanair from Liverpool to Santiago de Compostella.
Ryanair frequently change the routes that they fly on and their website doesn't always keep up with the changes. At the end of 2007, Ryanair added Belfast, Budapest, Bydgoszcz, Fuertaventura, Grenoble, Lodz, Salzburg and Tenerife to the destinations they serve from Liverpool. In order to free up the aircraft for these flights, they withdrew services to Inverness, Aberdeen, Ancona, Bergerac, Nimes, Santander, Kaunas and Santiago de Compostella.
As stated above, the only UK flights direct to Santiago de Compostella are with Ryanair from Stansted. Unfortunately, according to the Aena (=Spanish Airports' Authority) website, the neighbouring airports don't receive flights from the north of England. Vigo has no direct links to the UK and A Coru�a only has Clickair flights to Heathrow. Even more distant airports, such as Asturias (Oviedo) and Le�n ,only have flights from the south of England. (Asturias is served by easyJet from Stansted. Le�n currently only handles domestic flights).
Theoretically, you could fly from Liverpool to Porto with Ryanair and then travel by train to Santiago de Compostella. However, there's only one train service per day that can get you there in around 4� hours. At other times the journey takes around 12� hours.