Delta and SkyTeam partners KLM and Air France have Dublin, Ireland on sale again for as low as $316 round trip from Washington Dulles IAD for departures from November to March 2017. Chicago is $482 round trip and San Francisco is $577.
A little difference this time around are flights in September and October are available for $100 more round trip. Washington IAD to Dublin is $422 September 12-20 and San Francisco to Dublin is $677 round trip on those same dates.
Delta Airlines Washington IAD – New York JFK – Dublin, Ireland DUB
$316.16 Sunday November 13 – Monday November 21
Hopefully there will be another response from American Airlines and United Airlines to these low fares.