Paginate problem

Hello guys, i've been having a problem with the pagination, i have a schedule table(ferry trips) and i add it a "search - filter" button, i have it with pagination of 20, and i have a route(different schedules in different routes) with over 60 register, so with i filter to get that info i only get it to display correct the first page, but when i clic on the second page it goes to the full table and data.

This is my code

Scope function in model

        static function scopeFiltro($query, $filtro)
        {
            $rutas=config('options.ruta');

            if($filtro != "" && isset($rutas[$filtro]))
            {
                $query->where('Ruta', $filtro);
            }
        }

config file

return array(

  'ruta' =>[
    ''                              => 'Seleccione una ruta',
    'Playa del Carmen - Cozumel-1'  => 'Playa del Carmen - Cozumel-1',
    'Playa del Carmen - Cozumel-2'  => 'Playa del Carmen - Cozumel-2',
    'Puerto Juarez - Isla Mujeres'  => 'Puerto Juarez - Isla Mujeres',
    'Playa Tortugas - Isla Mujeres' => 'Playa Tortugas - Isla Mujeres',
    'El embarcadero - Isla Mujeres' => 'El embarcadero - Isla Mujeres',
    'Playa Caracol - Isla Mujeres'  => 'Playa Caracol - Isla Mujeres'
    ]

);

View file

<?php use App\Http\Controllers\crudHorariosController; ?>
{{-- Extends/Includes --}}
    @extends('layouts.Admin.admin')

{{-- Variables de estructura --}}
    @section('pageId', 'admin')
    @section('pageCls', 'dashboard')

{{-- Variables de pagina --}}
    @section('meta_title', 'Horarios')

{{-- Estructura HTML --}}
@section('content')
        <div class="pull-left">
            <h2>Lista de horarios</h2>
        </div>
        <div class="clearfix"></div>
        <div class="panel panel-default">

          <div class="panel-heading">
            <div class="act-btn vertical-center">
                                {!! Form::open(array('route' => 'admHorario.index','method'=>'GET', 'class' => 'search-form act-btn-btn mh-20px', 'role' => 'search')) !!}
                                    {!! Form::select('filtro',config('options.ruta'), NULL, ['class' => 'form-control']) !!}<div class="mh-5px"></div>
                                    <button type="submit" class="btn btn-info">Filtrar</button>
                                {!! Form::close() !!}
                {!! Form::open(array('route' => 'admultramar.store', 'class' => ' act-btn-btn mh-20px')) !!}
                {!! Form::hidden('message', 'horarios') !!}
                {!! Form::submit('Crear', ['class' => 'btn btn-block btn-success']) !!}
                {!! Form::close() !!}
                <a class="btn btn-primary act-btn-btn mh-20px" href="{{ route('admultramar.index') }}"> Volver</a>
            </div>
            <div class="clearfix"></div>
          </div>

          <div class="panel-body">

            @if ($message = Session::get('success'))
                <div class="alert alert-success">
                    <p>{{ $message }}</p>
                </div>
            @endif
            <div class="table-responsive">
              <table class="table table-striped table-bordered">
                  <tr>
                      <th>No</th>
                      <th>Ruta</th>
                      <th>Hora Ida</th>
                      <th>Hora Regreso</th>
                      <th>Estatus</th>
                      <th>Action</th>
                  </tr>
              @foreach ($horarios as $key => $item)
              <tr>
                  <td>{{ $item->id }}</td>
                  <td>{{ $item->Ruta }}</td>
                  <td>{{ $item->HSalidaHora }}:{{ $item->HSalidaMinuto}}<?php if( $item->HSalidaMinuto < 10) echo '0'?> {{ $item->HSalidaAP}}</td>
                  <td>{{ $item->HRegresoHora }}:{{ $item->HRegresoMinuto}}<?php if( $item->HRegresoMinuto < 10) echo '0'?> {{ $item->HRegresoAP}}</td>
                  <td>{{ $item->Status }}</td>
                  <td>
                    <div class="act-btn">
                      <a class="btn btn-warning mh-10px" href="{{ route('admHorario.edit',$item->id) }}">Editar</a>
                      {!! Form::open(['method' => 'DELETE','route' => ['admHorario.destroy', $item->id]]) !!}
                      {!! Form::submit('Eliminar', ['class' => 'btn btn-danger mh-10px']) !!}
                      {!! Form::close() !!}
                    </div>
                  </td>
              </tr>
              @endforeach
              </table>
            </div>
          {!! $horarios->render() !!}

          </div>

        </div>
    @endsection

Dont know what could be