When you visit us here at aircanada.com, you'll find our lowest North American fares. No need to search for lower Air Canada fares elsewhere - you won't find them. That's our Lowest Fare Guarantee. In fact, if you find a fare that's even $1 less for the exact same Air Canada itinerary with a Canadian online travel retailer within 24 hours of completing a purchase on aircanada.com, Air Canada will offer you a credit of $50 plus the fare difference, per passenger, for future roundtrip travel.

Thanks for providing the link.

This is what I read on the link provided by you...not sure if Airfare.com is a canadian travel retailer...