I'm very sorry to hear aboukt your loss. Hopefully your parents weren't home.
Further to what others posted I would not bother with bereavement fares. I made the mistake of booking a berevement fare years ago; I wasn't thinking straight and it turns out I would have been way better off buying a last minute ticket.
A few other points to consider...
1) If you are on a flexible ticket, AC will often waive change fees because of a death in the family. You could consider going home and book another return ticket at an appropriate time.
2) If you want to book a separate trip home (with a return to Canada), you could check with the insurance company to see if they'll give you a partial refund up to the amount of the change fees they would have covered.
Again, my condolences.