Https://www.cucei.udg.mx/carreras/electronica/sites/default/files/webform/what_is_the_24-hour_rule_for_lufthansatm_internationalr_lufthansa_have_free_cancellation_customer_service.pdf https://www.cucei.udg.mx/carreras/electronica/sites/default/files/webform/what_is_the_24-hour_rule_for_lufthansatm_internationalr_lufthansa_have_free_cancellation_customer_service.pdf https://www.cucei... https://www.cucei.udg.mx/carreras/electronica/sites/default/files/webform/what_is_the_24-hour_rule_for_lufthansatm_internationalr_lufthansa_have_free_cancellation_customer_service.pdf