How long can Chengdu Airlines get a free refund? Chinese website search found that the flight delay refund regulations were formulated by airlines. Generally speaking, if the flight is delayed for more than 2 hours, the airline will provide free catering and accommodation services. If the delay exceeds 4 hours, you can choose to change the visa or refund the ticket in full. However, the specific refund regulations may vary from airline to airline. It is recommended that you carefully read the refund and change policy when purchasing tickets. Chengdu, also called Rongcheng and Jincheng for short, is a prefecture-level city under the jurisdiction of Sichuan Province, a provincial capital, a sub-provincial city, a megacity, a national central city and a world food capital.