For example, using promo code WOWBDAY on wowair.ca, we found seats departing Toronto YYZ on Saturday, September 29, returning from Dublin DUB on Saturday, October 6. Flights connect via Reykjavik KEF.
You'll find this price on other dates in September and October, and the promo code will discount all travel from August 15 through October 15, 2018.
WOW basic fares only include one small personal item up to 22 lbs. Carry-on bag fees start around $57 CAD (online price) each way for bags larger than 17x13x10 inches. Checked bag fees start around $80 CAD (online price) each way for bags up to 44 lbs. on basic fares.
Adding a carry-on bag to this fare brings the price to a total of $449 CAD ($350 USD) roundtrip, which is still an excellent deal. If you prefer to fly nonstop, you can fly on Air Transat for $594 CAD ($459 USD) roundtrip, which includes a carry-on bag plus one personal item and one free checked bag.
Need a room in Dublin? Here's what's available for the above dates on Hotelwatchdog.