I got in on this, taking a one way flight from Montreal to Toronto in July to return from The Police concert (I'll take the train down with friends):

It's a good time to book airfare in Canada, with rival airlines Air Canada and WestJet offering competing promotions in a bid to win over consumers.

Air Canada on Tuesday dropped its prices on select routes to $11 one-way to match bargain prices offered by rival airline WestJet, said Peter Fitzpatrick, a spokesman for Montreal-based Air Canada.

On Tuesday only, an $11 ticket could be bought for flights between Toronto, Ottawa and Montreal