VIA Rail is offering a 50% sale (off the fare price only) for travel by February 28, 2015. You just need to book your trip between
October 30, 2014 and November 2, 2014. There is a 7-day advance purchase necessary. There is also a minimum Economy adult one-way fare after 50% discount must be at least $30.
This is a great promotion because it covers the Christmas period. I would not wait too long to book your trip because space is limited for this promotion.