Porter Airlines flight to anyone who inputs the code JUNE20 when booking. Though travelers must book by end of day June 30th (this Wednesday), the discount applies on flights through December 15.
With the discount, the rates are darn competitive, though not always lowest in the market (I priced out a late October, early December jaunt from Toronto round-trip to NYC which came out about $15 less expensive on Air Canada). So before booking, check out such airfare aggregator sites as Momondo.com and Kayak.com. (Though frankly, if you're traveling from downtown Toronto, a difference of a few dollars may be made up by the convenience of traveling from Billy Bishop Airport.)
Porter flies from Toronto to Boston, Chicago, New York City and Myrtle Beach in the USA; Halifax, Moncton, Montreal, Mont Tremblant, Ottawa, Quebec City, St. John's, Sudbury, and Thunder Bay in Canada.
(Photo by Tom Purves)