Dubai , Riyadh , Doha , Doha and Riyadh are all upgrading their main transport hubs . There is pressure in the region to build the most 'iconic ' airport . The combined capacity in the region will number three -- 450 million times current traffic . They are capturing a market share from European carriers , and compared to the GCC countries , they have a strong domestic market . Istanbul and Doha are both claiming their airports will be the world 's biggest .
Dubai , Riyadh , Doha , Doha and Riyadh are all upgrading their main transport hubs . There is pressure in the region to build the most 'iconic ' airport . The combined capacity in the region will number three -- 450 million times current traffic . Istanbul and Doha are both claiming their airports will be the world 's biggest .