The EU Transport Ministers reached agreement on various health measures to be imposed on board aircraft flying over the continent, as well as at airports.
Ministers agreed that the wearing of masks will be obligatory for anyone aged over six.
Other measures agreed by ministers during a video-conference included obligations for airlines to disinfect aircraft more often and to enforce safe distances, even if this results in long queues at airports.
Most airlines already make it mandatory for passengers to wear face masks while boarding planes and whilst on board the aircraft, but children have often been exempt.
Masks are also compulsory in many airports including in France, which made the coverings obligatory in all public indoor spaces for anyone aged over 11.
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Airlines issue strict rules on wearing masks and warn passengers they will be refused entry to planes if they do not comply.
To ensure full safety whilst wearing a mask, airline easyJet says masks should be replaced every four hours.
A statement on the website said: “Protective face masks should typically be replaced every four hours, or if they become wet or soiled, so please ensure that you have an adequate supply for you and anyone else travelling with you for the entire duration of your journey.”
European countries are battling to prevent a resurgence of coronavirus cases with countries like Spain, France and Belgium all seeing a rise in cases in recent days.
Switzerland, while not a member of the EU, has had a compulsory mask requirement on all flights since early July.