The global aviation body said Tuesday that the risk of catching COVID-19 on a plane was low and there was no need to leave the middle seat empty once the industry takes off again.
The International Air Transport Association backed the wearing of masks by both passengers and crew but said it did not support physical distancing measures that would leave the middle seat empty in a row of three.
There would be "dramatic cost increases" if such seats were left empty, IATA said in a statement, warning that airlines might otherwise go bust if they struggled to break even.
The aviation industry has taken a big hit in the coronavirus crisis, as lockdown measures and travel restrictions bite. IATA said that evidence so far - which it admitted was limited - suggested the risk of virus transmission on a plane was already low.
It said the reasons why this could be include the fact that passengers face forwards, with limited face-to-face interaction, while seats provide a barrier to the person in front.
It said the air flow downwards from the ceiling to the floor further reduces the potential for transmission, while air flow rates are not high and "not conducive to droplet spread" as in regular indoor environments.
Meanwhile, High Efficiency Particulate Air (HEPA) filters on modern aircraft clean cabin air to hospital operating theatre quality, said IATA.
"The cabin environment naturally makes transmission of viruses difficult," said IATA chief Alexandre de Juniac.
"Our aim is to make the cabin environment even safer with effective measures so that passengers and crew can return to travel with confidence.
"Screening, face coverings and masks are among the many layers of measures that we are recommending. Leaving the middle seat empty, however, is not."
Besides everyone adopting masks on board, proposed temporary measures to reduce the risk of infection include temperature screening of passengers, airport workers and passengers, and limiting movement in the cabin mid-flight.
More frequent and deeper cleaning measures are being considered, along with boarding and disembarking processes that reduce contact.
Immunity passports and testing for the novel coronavirus could also be included, in time.