I once booked an Air Canada flight late at night and realized the next morning that I picked the wrong return date. I was panicking until I learned they have a 24-hour change and cancellation policy. I called 877-764-3622, and the agent confirmed I could switch my ticket without any fees since I was still within the 24-hour window. They rebooked me on the correct flight right away, and I didn’t lose a dime. It was such a relief because I thought I’d be stuck paying extra. If you ever need to cancel or modify your Air Canada booking quickly, especially within that first day, that number is the most reliable way to handle it stress-free.