Originally Posted by
dingo
FWIW, my likely routing on this would be CLT - LHR and then either a train or additional flight (most likely) into Dublin.
There's no tunnel between Great Britain and Ireland, so a flight is the only sensible option. The train service will take you to a ferry to get across the Irish Sea, will take forever and will probably cost far more. There are a zillion flights from LHR to DUB, but the cheap flights are from LGW and STN.