Ryanair Shannon flights come in from Paris, Brussels and Frankfurt (Hahn) on Ryanair.
However by changing planes you can access Shannon on Ryanair from many other places.
Alternatively fly to Stansted and change there for the Shannon flight.
Via Frankfurt : Oslo, Stockholm, Pescara, Bologna, Rome, Pisa, Montpeilier, .
Via Brussels : Pisa, Rome, &
Carcassone.
AS Ryanair is point-to-point you have to offload baggage and connections are NOT guaranteed. Therefore plan on a changover of four hours, or an overnight stay at the transit point. To be on the safe side when flights come up very cheap you can always book a later flight and only use it if you get delayed.
It may be a bit of a hassle but it does work if you have the patience.
update 2005 : Ryanair appear to have buried the hatchett with the airport authortity and now feature the 14 routes to Shannon : from the UK, spain, Germany, france, Italy and Belgium. This therefore allows many more 'connections' - more than I care to list anyway.

