A flight reservation confirmation is a unique alphanumeric code—often called a Record Locator, Booking Reference, or PNR (Passenger Name Record)—that serves as the official digital fingerprint of your travel plans. In 2026, this 6-character code is generated the moment your payment is authorized and your seat is "HK" (holding confirmed) in the airline's Central Reservation System. This code is not just a receipt; it is the master key that links your passport data, contact info, and specific flight segments across global distribution systems. You can use it on the airline's website to manage seats, pre-order meals, or check in 24 hours before departure. If your journey involves multiple airlines, you may actually have different PNRs for each carrier, so it is vital to keep the master confirmation from your booking agent and verify each individual leg's status to ensure a seamless "check-through" of both your body and your baggage at the airport.