On a previous trip to sorrento we used the airpot bus both ways however I have just checked the website and it seems the last bus to the airport is 4.30 which is quite early. Our return flight is not until around 9.30 pm and we dont really want to waste time sitting in the airport. I think a taxi is too expensive and I know the train is an alternative but I have found online a number of companies who run a shared mini bus type service for about £20 to £23 each. Has anybody used such a company they can recommend? The one I was thinking of booking is through travel republic.