Your Passenger Name Record (PNR), often called a booking reference or reservation code, is a unique six-character alphanumeric string (e.g., A1B2C3) that serves as the digital certificate for your flight. You can find it in several primary locations: the confirmation email sent by the airline or travel agent immediately after booking, the "Manage My Booking" or "My Trips" section of the airline's official website or mobile app, and prominently displayed on your boarding pass (physical or digital) or e-ticket. It is usually located near your name or the flight details. If you booked through a third-party site like Expedia or Skyscanner, search your email for "Booking Reference." This code is essential for online check-in, selecting seats, and making changes to your itinerary. To maintain your privacy, you should never share photos of your boarding pass on social media, as the PNR can be used by others to access your personal contact information and travel history.