It looks like WestJet will be matching the Air Canada promotion. From now until September 25, 2011, save an extra 15% off all destinations on new online bookings.

To redeem this offer, bookings must be made on Both the promo code PCR95 and coupon code 6LU4ZWI are required at the time of booking on the first page of the booking process. Bookings must be made by September 25, 2011 (9:59 p.m. MT) For Canadian and U.S. destinations travel must occur before December 15, 2011. For international destinations travel must occur before February 29, 2012. 15% off promo code cannot be used when booking blue tag sale fares. [WESTJET.COM]