Yes, a PNR (Passenger Name Record) is effectively your reservation number, but it is more technically a "record locator" for a digital file stored in an airline's database. While many travelers use the terms interchangeably, your PNR is specifically the six-character alphanumeric code (e.g., K9X2P4) that identifies your entire itinerary. This code is much more powerful than a simple serial number; it contains your flight details, seat assignments, meal preferences, and even your passport information. In 2026, it is important to note that if you book through a travel agent or a site like Expedia, you might have two different codes: one PNR for the travel agency's system and a separate "Airline Confirmation Number" for the actual carrier. You need the latter to check in online or via the airline's app. While the PNR serves as your primary reference for managing your booking, it is distinct from your "E-ticket number," which is a 13-digit sequence specifically related to the payment and issuance of the fare itself.