The short version
A PNR (Passenger Name Record) is the booking itself inside a reservation system. The six-character code you see - the booking reference or record locator - points to it.
The terms you'll see
| Term | What it is |
|---|---|
| Booking reference / PNR | Code for the booking in the system it was made in |
| Airline reference | The airline's own code for the same booking, if different |
| E-ticket number | 13-digit number issued only when a fare is paid |
| Status code (HK) | "Holding confirmed" - the airline has the seat for you |
Confirmed vs ticketed
A booking can be confirmed (the airline holds a seat in your name) without being ticketed (no fare paid yet). Airlines give unticketed bookings a deadline; if nothing is paid, the seat is released automatically.
That's exactly what a flight reservation is: a confirmed, unticketed booking with a real reference that can be looked up - suitable as proof of a planned itinerary, but not for boarding.
Which one gets checked
Check-in agents and embassy staff typically look up the booking reference with your surname. Boarding a flight requires an e-ticket.
Where PNRs live
Bookings are created in a reservation system - an airline's own system, or a global distribution system (GDS) such as Amadeus, Sabre or Travelport used by travel agencies. When an agency books a flight in a GDS, the booking is also sent to the operating airline, which may give it its own reference. That's why one trip can have two codes: the agency's booking reference and the airline reference.
What's inside a PNR
A PNR holds at least the passenger names, the flight segments, contact details and a ticketing arrangement - the deadline or instruction for issuing a ticket. Optional elements include frequent-flyer numbers, seat requests and special service requests such as meals or wheelchair assistance.
Why held bookings expire
Airlines don't hold unpaid seats forever. A held booking carries a time limit, and when it passes without a ticket being issued, the segments are canceled and the seat goes back on sale. A flight reservation for onward travel or a visa uses exactly this mechanism - which is why it can be checked while it is valid and disappears once it lapses.
Codes you might see
Status codes such as HK (holding confirmed) or KK (confirmed by the airline) appear on some itineraries. You don't need to memorise them - the airline website will show whether the booking is confirmed.
Frequently asked questions
Is a booking reference the same as a ticket number?
No. The booking reference identifies the booking; a 13-digit e-ticket number is issued only when a fare is paid.
Why does my trip have two different codes?
Bookings made through an agency or GDS often have an agency booking reference and a separate airline reference for the same flights. Either can usually be used to look it up.
Can a PNR exist without a ticket?
Yes. A confirmed, unticketed booking is exactly what a flight reservation is. It is released automatically if no ticket is issued before its time limit.