The Iran war is having a profound effect on the global aviation sector , with jet fuel shortages and surging prices wreaking havoc on flight routes. On Tuesday, April 21, Germany's largest carrier Lufthansa announced it had canceled 20,000 flights between May and October to try and save fuel. The airline said the short-haul flights being cut would remove "equivalent to approximately 40,000 metric tons of jet fuel, the price of which has doubled since the outbreak of the Iran conflict." Dutch airline KLM last week canceled 160 flights for the coming month, while other airlines in Europe and across the Asia-Pacific region are raising prices and grappling with the possibility of mass cancellations as the summer holiday period draws nearer.…