Air Canada is currently offer cheap US-Canada flights for travel through the fall and winter. There are over 50 routes on sale and round-trip prices start at $252. These are the rules:
– Every route has its own travel dates. You can generally fly October through January.
– On most routes you can fly Tuesdays, Wednesdays and Saturdays only.
– Sale fares are one-way; round-trip purchase not required.
– Up to 30-day advance purchase required; this varies on each route.
– No book-by date. Sale fares are available until sold out.