Yes, an airline ticket number is a globally unique 13-digit identifier that is specific to a single passenger's journey. Unlike a PNR (Passenger Name Record) or "Booking Reference," which consists of six alphanumeric characters and can represent an entire family or group traveling together, the ticket number is assigned to each individual person. The first three digits of the ticket number are the airline's specific IATA code (for example, 001 for American Airlines, 016 for United, or 080 for LOT Polish Airlines). The following ten digits are a unique sequence that serves as the actual legal contract of carriage between the traveler and the airline. This number is used for financial accounting, tracking "coupons" for different flight segments, and processing refunds or changes. Because it is unique to the individual, even if you are on the same PNR as three other people, you will each have a distinct 13-digit ticket number. This level of granularity is essential for security and international tax regulations, ensuring that every person on the aircraft is accounted for individually in the airline's database and by border control authorities during the "e-ticket" verification process.