WestJet.com and AirCanada.com have released their fall sales (must be booked by August 7, 2013).

Air Canada and Westjet August Promo
Air Canada and Westjet August Promo

Air Canada

  • Valid on Tango fares.
  • For travel from September 3, 2013 until February 12, 2014.
  • Book by August 7, 2013, 11:59 p.m. local time, from your city of departure.
  • Blackout dates: From December 17, 2013 to January 5, 2014.

Use promotional code SURPRISE15

Source

WestJet

Save an extra 15%* for travel within Canada

Promo code: WJC71

Coupon code: 2CCSYWP
Book by: August 7, 2013 (9:59 p.m. MT)
Travel from: September 3, 2013 to February 12, 2014
Blackout dates from: December 17, 2013 to January 5, 2014

How to get this offer: To redeem this offer, bookings must be made on westjet.com. Both the promo code and coupon code are required at time of booking on the first page of the booking process. Percentage is applied to base fare excluding taxes, fees and charges. Discount can only be applied towards fares displayed in the Econo and Flex category.

Source