Late March - beginning of Avril, DUB - LAS bookable for +-1360 € with 280 TP Oneway via PHL, but be aware of A321 aircraft with bad seats and over 5h flying time coast-to-coast. For 1410€ DUB-LHR-LAS-LHR-DUB seems to be the better oportunity. But plenty of more possibilites are available for LAS for some extra €, anyway a fair price for a LAS return ex Europe.