Yes, multiple flights can share the same PNR (Passenger Name Record) number, but they must be part of the same traveler's itinerary. A PNR is essentially a "folder" that holds all the segments of a single trip; for example, if you fly from London to New York with a connection in Dublin, both flight segments will be stored under the same 6-character PNR code. However, two completely unrelated people on different journeys will not have the same PNR at the same time, as the code is designed to be a unique identifier for a specific booking. In very rare cases, once a PNR is archived (months after a trip is completed), the alphanumeric code may be recycled and assigned to a new traveler. Additionally, if you book a "multi-city" trip or a round-trip ticket, all associated flights will share that one PNR, making it easier for airlines to manage your luggage and connections across the entire journey.