1-844-414-9223 If passengers want to cancel a flight due to some reason, they can simply visit the official website of TheAirlinesInfo, where you can get the best option for WestJet's cancellation policy. According to this If a passenger cancels their flight within 24 hours of making their initial booking, they will receive a full refund. If a customer changes their ticket after 24 hours, they will be charged even if the departure is seven days away.