[Laravel] Nhờ các bác giúp em code show thông tin chuyến bay với ạ :((

public function showBookingPage(Request $request)
    {
        $startCity = $this->cityModel->find($request->flight_from);
        $arriveCity = $this->cityModel->find($request->flight_to);
        $startDate = $request->date_from;
        $arriveDate = $request->date_to;
        $totalPassenger = $request->adult + $request->children + $request->infant;
        $flights = $this->flightModel
        ->join('airport', 'airport.city_ID', '=', $startCity->id)
        ->where('start_airport_ID', '=', $startCity->$this->airportModel->id)
        ->get();

        return view('client.home.booking')->with([
            'startCity' => $startCity,
            'arriveCity' => $arriveCity,
            'startDate' => $startDate,
            'arriveDate' => $arriveDate,
            'totalPassenger' => $totalPassenger,
            'flights' => $flights,
        ]);
    }

Em đang muốn show list các chuyến bay có start_airport_id (trong model flight) = airport_id (trong model airport) mà airport có city_id = $startCity