Air travel is a rapid and efficient mode of travel nationally and internationally. People with a psychiatric disorder can usually travel safely, but may at times require an escort. People whose mental state or behaviour are disturbed are not fit to travel until stability has been achieved. Suicidal or homicidal behaviour by those so disposed are fortunately rare, but can be catastrophic in outcome. Careful assessment is necessary, and psychiatrists are advised to be more aware of the possibility of liaison with airport medical services when appropriate.