Flight number

Common card · No. 360050

In the aviation industry, a flight number or flight designator is a code for an airline service consisting of a two-character airline designator and a 1 to 4 digit number. For example, QF9 is a Qantas Airways service from Perth, Australia to London Heathrow. A service is called "direct" if it is covered by a single flight number, regardless of the number of stops or equipment changes. For example, QF1 flies from Sydney to Singapore to London on Qantas Airways. A given flight segment may have multiple flight numbers on different airlines under a code-sharing agreement. Strictly speaking, the flight number is just the numerical part, but the term is commonly used to refer to the entire flight designator. The flight number of the operating carrier of a commercial flight is commonly used in the aircraft's call sign. This is distinct from the aircraft's registration number, which identifies a specific airplane.

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