WestJet says weak Alberta economy weighing on demand

WestJet Airlines Ltd's quarterly revenue per available seat mile, a key measure of profitability, is poised for its steepest decline since 2009, as Alberta's weakening economy weighs on leisure and business travel from the western Canadian province. Alberta, known for its oil-rich resources, has been hit by a near 70 percent plunge in oil prices since June 2014. Airlines in western Canada that were once blooming in the oil-rich region have been recording a significant decline in passenger traffi