International flights will be subject to the system's calculations, according to the airlines' statements. BEIJING: Several Chinese airlines, including national carrier Air China, said they will raise their fuel surcharges on domestic flights from Sunday (Apr 5) as the war in the Middle East drives up oil prices globally. Air China, China Southern and its subsidiary Xiamen Airlines said in statements that they will increase surcharges on flights of up to 800km by 60 yuan (US$8.70), and 120 yuan