We think at that time of year, and based on what you would like to see and do, you should start and finish your cruise in:
If you are flying in to Dublin, another option is to take a one-way Shannon cruise from Carrick-on-Shannon to Banagher or a one-way Shannon-Erne cruise from Carrick-on-Shannon to Bellanaleck. You can take our bus transfer from the airport to one marina and then return to the airport from another marina.
Need some activity inspiration for your stop in Carrick? Check out our blog post on the best things to do in Carrick-on-Shannon.