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Qatar is offering cheap flights to Dublin, Ireland including on St. Patrick's Day. What's good about this is that you can combine with this deal to get a further 15% off the flight. Flights include bags, meals, and seats on one of the top airlines in the world. If your stopover is 8 hours or more, you get a free hotel stopover in Doha. Pretty good way to split up your flight.
So as an example, booking from March 4 - March 28 (March 17 is St. Patty's Day), will bring you up with a fare of $1370.83. The Groupon code takes 15% off the base fare (e.g. not off the taxes, surcharges) bringing the total down to $1269.
You can find the cheap flights on Google Flights then plug them into Qatar's website. Looks to be plenty of dates from January to June 2018
There are more destinations in the sale like Barcelona, Milan, Copenhagen for slightly more.