From Rennes Train Station
There is a direct train from Paris Montparnasse to Rennes. We will organize a shuttle from Rennes train station to the Abbaye of St. Jacut.
From Rennes Airport
The closest airport is Rennes Airport. There is a TER (a train) that takes you from the airport to the Rennes train station. The problem is then reduced to the From Rennes Train Station case.