No, every passenger does not necessarily have a different PNR (Passenger Name Record) number; instead, a PNR represents a "booking" rather than an individual person. If you book a flight for a family of four under a single transaction, all four passengers will share the same 6-character alphanumeric PNR code. This allows the airline to group the travelers together for seat assignments, meal preferences, and baggage tracking. However, each individual within that PNR is assigned a unique Ticket Number (a 13-digit code starting with the airline's specific prefix, such as 001 for American or 016 for United). If you are traveling in a group but booked your tickets separately, you will each have a different PNR, even if you are on the same flight; in this case, you can ask an airline agent to "link" the PNRs so they know you are traveling together. For certain international security protocols, each individual's data (like passport numbers and birthdates) is stored within the shared PNR "record locator," but for most administrative purposes, the PNR is the master "folder" for the entire party's travel itinerary for that specific trip.