Qatar’s Civil Aviation Authority chief Abdul Aziz Mohammad Al-Noaimi told AFP that the seaside airport, whose construction began in 2007 with 50,000 workers, was built at a cost $15.5bn.Initially, the facility will only be open to 10 airlines, including flydubai, with other carriers including Qatar Airways expected to use it from May 27, airport officials say.Named after Qatar’s former emir, the airport had originally been scheduled to open on April 1 last year, but this was delayed after it failed to meet new security standards.The airport, which replaces the old Doha International, will initially be able to handle 30 million passengers per year, and its sponsors hope to expand that figure to 50 million by the time work finishes in 2020.