I'm seeing strikingly good fares Boston-Dublin in late November: US 11/27 (Wed) to 12/10 (two weeks), $506 all-in. UA 11/24 to 12/10, $520 all-in. UA 11/28 to 12/8, $550 all-in. AA and DL have similar options available. With UA, longer routings are possible: I priced BOS-IAH-EWR-DUB-IAD-BOS for $606. With 500 mile minimums, that's 10094 PQMs, $.06/PQM. Not stellar, but it beats most other Europe fares right now. Biz fares right around Thanksgiving are running ~$1700 on UA, also.