Originally Posted by
Gardyloo
ORD-DUB or v.v. is the secret (or XXX-xORD-DUB).
That certainly helps, but the cheapest ORD-DUB one-way still is $528++, at which point the OP might as well save the miles and purchase a round-trip if he can get it for $712.
To the OP: these types of queries are far easier to respond to if you tell us your routing. TATL is pretty broad.