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That's the lowest price we could find by $224. Buy Now at DealBase Tips We found this price on flights departing from Washington, D.C. (IAD) with arrival in Dublin, Ireland (DUB) on February 2 and return on February 6. Book this travel deal by December 23 for flights from February 1 through June 30. (Travel dates vary by destination.) All prices, dates, and booking details were valid at the time of publication.