<form role="form" method="post" id="searches" accept-charset="utf-8" action="<?php bloginfo('template_url');?>/form.php" novalidate >

                <label class="input-da-serach-1" for="de">De <input type="text" id="de" name="de" placeholder="Cidade:" required ></label>

                <label class="input-da-serach-1" for="searches=[to_airports]">Para <input type="text" id="searches=[to_airports]" name="searches=[to_airports]" placeholder="Cidade:" required ></label>

                <label class="input-da-serach-2" for="date_go">Ida <input type="date"  name="go_date" min_days="1" max_days="365" required></label>

                <label class="input-da-serach-2" for="data_back">Volta (opcional)<input type="date" name="search[back_date]" min_days="1" max_days="365" ></label>

                <label class="input-da-serach-2">Passageiros <input type="text" name="" placeholder="01" ></label>

                <button type="submit" id="searchsubmit" value="Procurar">Procurar</button>

            </form>