Wirelessly posted (BlackBerry: BlackBerry8530/5.0.0.1030 Profile/MIDP-2.1 Configuration/CLDC-1.1 VendorID/417)

If the OP is willing to fly home in J, I suggest he see if EI's seasonal DUB-SFO service is operating on his desired date of travel, and then check for award availability with either Avios (by calling BAEC), or UA miles (by checking united.com), as well as pricing out a cash ticket on that flight.

Very low surcharges when redeeming Avios on EI TATL flights.