The price of flights between Asia and Europe has soared after the closure of key Middle Eastern hubs due to the U.S.-Israel war against Iran, with airline websites showing tickets on many popular routes booked out for days.

Major Gulf hubs including Dubai ¡ª the world¡¯s busiest international airport that normally handles over 1,000 flights a day ¡ª remained closed for a fourth day on Tuesday, slashing capacity on popular routes like Australia to Europe, where Emirates and Qatar Airways normally have a high market share.

Australia¡¯s Flight Centre Travel Group has experienced a 75% increase in calls to its stores and emergency assistance lines since the crisis began and has teams working around the clock to help disrupted customers, its Global Managing Director Andrew Stark said.