TK YYZ-ATH J for CAD 2632 or USD 1985 / available in spring and fall 2019
Seems widely available. Not a bad deal, I thought, considering Y often costs well upwards of $1000. Books info J class.
Some options have a long layover on the return leg, however.
https://www.google.com/flights#flt=Y...2*2.CAD.526392
Hope this is helpful.