Chicago, DC, San Francisco to Dublin for $300-600 round trip! Flash sale.

There are lots of good deals to Europe for our pals on the East Coast, (hello, WowAir, Norwegian, and Thomas Cook!), and more and more on the West Coast (same airlines), but the Midwest is generally left high and dry. This flash sale from Chicago to Dublin changes that!
Secretflying lists Chicago to Dublin as $454 round trip, although of course it's just over $300 round trip from Washington, DC (the East Coast just has all the luck, huh?). Buy as soon as possible, as the sale will probably end within a few days, possibly sooner. Fly winter or spring 2017. Details here.