New guidance issued by the International Civil Aviation Organisation suggests that passengers should have restricted access to toilets onboard aircraft.
The UN body suggested that one toilet should be set aside for crew and passengers should use a designated WC based on their seat number.
Ryanair has already said that it will ban queuing for toilets, with passengers forced to ask crew for permission to use the lavatory.
Food and drink services should also be suspended or limited on short-haul flights or sold in pre-sealed packs, said ICAO.
Duty-free sales should be temporarily limited as part of the wide-ranging coronavirus safety recommendations, it added.
ICAO hasn’t insisted on social-distancing on planes, but it said passengers should be seated separately ‘when occupancy allows it’.
Hand luggage should be limited to a small bag per passenger, which can be stowed under the seat, and newspapers and magazines should be removed.
The UN body also said that in general, face masks should be worn in line with public health guidelines, and social distancing should be made possible where it is feasible.