If your Air Canada boarding pass or itinerary displays "SBY" in the seat column, it stands for Standby. This occurs when you do not have a confirmed seat assignment at the time of check-in, though you do have a confirmed ticket on the flight. This typically happens for one of three reasons: the flight is currently "full" and you are waiting for a seat to open due to a no-show, you are using a same-day standby request to catch an earlier flight, or you are an airline employee traveling on a "space available" basis. For regular ticketed passengers, an "SBY" designation usually means the gate agent will assign your seat shortly before boarding begins. In 2026, Air Canada’s digital systems often update this in real-time on their mobile app, so it is recommended to keep notifications turned on. If you are a revenue passenger (not an employee), you are almost always guaranteed a seat unless the flight is severely overbooked, in which case the airline would seek volunteers to take a later flight.