public function addFlight(Flight $flight)
    {
        if ($this->flight === null) {
            $this->flight = [];
        }

        $this->flight[] = $flight;

        return $this;
    }
public function addFlight(Flight $flight)
    {
        if ($this->flight === null) {
            $this->flight = [];
        }

        $this->flight[] = $flight;

        return $this;
    }
@param Flight $flight

@return Iata