The Globe and Mail reports in its Thursday edition that some airlines have started slashing fuel surcharges as peace talks in Iran appear poised to ease strained oil supplies. The Globe's Mariya Postelnyak writes that most carriers aren't jumping to cut costs, as summer travel demand remains strong despite higher prices. WestJet Airlines is reducing the fuel surcharge tacked on to its companion vouchers -- a perk from its MasterCard loyalty program – from $60 to $40 to reflect "a recent movement in fuel costs." A day earlier, Porter Airlines announced it is halving the $40 surcharge the carrier started applying to rewards flight redemptions back in March, when U.S.-Israeli attacks on Iran sent fuel prices surging by more than 50 per cent. On Wednesday, Brent crude fell to its lowest level since before the start of the Iran war. Still, many airlines appear to be riding out robust summer demand while trying to recoup hits to their margins suffered in recent months. Air Canada said that the $50 fuel fee per passenger added to ground packages for Air Canada Vacations, the carrier's tour operating arm, remains in effect. "There is still much uncertainty with regards to the situation in the Middle East," the airline said.