That would be your very best bet and should be fairly easy if the times work for you. Pisa is the closest airport to CT.
If it helps any - I did London to Pisa and then rented a car in Pisa. It was all very easy and quite quick. It is a very easy drive from Pisa to CT. There is a lot to park your car in Riomaggiore but I was able to park at a private lot owned by the folks who rented me the room.
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