travelInformation. transit.airline.legs\[\]. flightNumber {#travel-info-transit-airline-legs-flight-number}
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Flight number for a leg of a trip. Number assigned by operating or marketing carrier.

Specifications {#travel-info-transit-airline-legs-flight-number_Specifications}
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* **Data Type:** String
* **Data Length:**
  * `FDC Nashville Global`: 5
  * All other processors: 6
    {#travel-info-transit-airline-legs-flight-number_ul_v2m_dzb_twb}
    {#travel-info-transit-airline-legs-flight-number_ul_llv_blz_kxb}

Mapping Information {#travel-info-transit-airline-legs-flight-number_Mapping}
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* REST API Field: travelInformation.transit.airline.legs\[\].flightNumber
* SCMP API Field: airline_leg#_flight_number
* Simple Order API Field: airlineData_leg_#_flightNumber
  {#travel-info-transit-airline-legs-flight-number_ul_mlv_blz_kxb}