About 63 percent demand for flights fell in May compared to the same month before the 2019 pandemic, the International Air Transport Association (IATA) said on Wednesday.
IATA notes that international flights have been hit particularly hard by the restriction compared to domestic flights.
Willie Walsh, the organisation's chief executive, called on governments to work better together to support the most disadvantaged commercial flight sector.
The head of IATA also added that he was cautiously optimistic about forecasts for transatlantic flights. At a press conference on Wednesday, Walsh said he hoped to "loosen" restrictions on intercontinental flights in the coming weeks. The director specified that he was counting on opening connections between Great Britain and the United States. (PAP)