Pack your passport and get ready to head to London for cheap as part of a YYZ to DUB fare. A member on Flyertalk found a Fuel Dump From $315 rt. From SFO, LAX, SEA, LAS, ORD, DFW, JFK, PHL, or any city AA or BA flies to directly to from Europe. Say that you are in PHL, CLT, JFK, ORD, or DFW you will just add on a leg from your city to YYZ as a 3rd segment of a multi city. If not then you will have to book an extra leg from the end of the 2nd segment to your final destination. The US to YYZ segment will be abandoned and you won’t fly it. Available most of the year through April 2016.
You may also try this fuel dump on other cities in Europe such as Paris and Madrid, but you can experiment on Google Flights. It’s best for MON, TUE, and WED departures and returns for the most availability.
ie. Dallas to Madrid $412 r/t Oct 6 – Oct 13
ie. Dallas to London $573 r/t Oct 6 – Oct 13
ie. Dallas to Paris $586 r/t Oct 6 – Oct 13
If you’re booking on Orbitz then select “American Airlines”, “Iberia” and “British Airways” as preferred airlines.