[MENTION=855926]rt23456p[/MENTION] is wrong about the level of the fee - it's C$150 (or C$175 if you call in), unless it's Flex (C$75; C$125 if you phone in) - but that's your worst case scenario. They may or may not waive it as a goodwill gesture if you call in. As @p106_peppy pointed out, this itinerary is quite far out, so there's a decent chance of a schedule change that might allow you re-book, or to cancel with no fee.