Flights JFK to DUB

So I'm doing a little flight research, just to get a better idea of total trip cost (and mostly to make sure my budgeted $4k is going to actually be enough).

Today on Aer Lingus: Roundtrip Flights from New York to Dublin are roughly $775 $1,050 per person (That's leaving on June 2 and returning on June 23, which is a 21 day trip and I think a bit longer than what we're looking for, but you get the idea). I'm not sure if that's a sale, it doesn't seem like it, but it sounds like a really great decent price nevertheless.

Leaving Thursday, May 26th and returning June 9th (15 days) is roughly $745 $1,000 per person.
Leaving Thursday, June 9th and returning June 23rd (15 days) is roughly $775 $1,050 per person. (This timeframe is kinda my preference right now).
Basically what I'm getting at is that dates and number of days are flexible, all giving us $800 $1,050 per person to get to Dublin.

Looks like the cheapest days to travel are Monday through Thursday. So we probably need to decide if we want to do that, to save some cash, or if we want to travel on the weekends, to save some vacation days. And its looking like the savings is only about $30 $40 round trip/per person, so I don't care either way (cash vs vacation days).

OH WOW - It's actually much cheaper to fly out of Dulles IAD! June 9th through June 23rd from IAD to DUB is only $685 $925. And IAD is actually much better for The Diegos because we're planning to use my free SWA flights to get from west coast to east coast, and SWA flies to IAD but not to JFK or Chicago O'Hare (they do LaGuardia and Midway though, so we could make it work if we had to).

KDiego