Europe’s airlines will struggle more than competitors elsewhere to end losses next year as they’re held back by higher expenses and their dependence on international routes, according to the International Air Transport Association.

The region’s carriers should achieve seat-occupancy levels averaging 63.8% for the whole of 2020, increasing to 65.6% in 2021. That’s still below the projected break-even load factor of 71.9%, IATA said in a presentation Wednesday.

European airlines are expected to post a combined loss of $11.9 billion next year, the sharpest deficit among six regions and corresponding to almost one-third of the global tally. The loss in 2020, while wider, will rank well behind those in North America and the Asia-Pacific, equaling 23% of the total, IATA says.

Europe’s recovery will be tougher because of the high break-even barrier resulting from the cost of doing business, said Rafael Schvartzman, IATA’s vice president for the region, citing recent increases in air-navigation fees in nine nations. A reliance on international revenue has also left Europe’s carriers more vulnerable when countries impose anti-pandemic lockdowns, meaning stronger sales won’t arrive until later in 2021.

Still, the probable early distribution of Covid-19 vaccines in Europe means the aviation restart could get a boost, though only if the region adopts a harmonized approach that’s so far been lacking, Schvartzman said.