近几年来，美国交通部通过监管渠道加强了对美国航空旅客的消费者保护，最新的规则于 10 月 28 日生效。交通部规定，当国内航班延误三小时、国际航班延误六小时时，乘客可以要求取消机票并退款，无需支付任何罚金。此外，还要求在 20 天内以现金（支票或电汇）或原支付方式发放自动退款。
根据法条需要在收到用户退款需求后的 7 天内退款，如果是信用卡买的票，需要 20 天内退现金或者其他方式。
In subsection (b) of section 42305, the Act established requirements for the timing of the refunds required under subsection (a) . Air carriers and foreign air carriers must issue refunds not later than 7 business days after the earliest date of the refund request, as specified in subsection (f) , for tickets purchased with a credit card, and 20 days for tickets purchased with cash or another form of payment.
法条定义了什么叫重大改变和延误，
The Act also defined a “significantly changed or delayed flight” in subsection (d) of section 42305 as a flight to include, at a minimum, a flight where the passenger arrives at the passenger's destination airport 3 or more hours after the original scheduled arrival time for a domestic flight and 6 or more hours after the original scheduled arrival time for an international flight.
当然，最终怎么执行还是得看航空公司的。这个法条有个缺点就是不像欧洲的那样有具体的对航空公司的处罚措施，这限制性就弱了。如果你真的没有在指定时间拿到退款，只能靠投诉或者起诉的方式，对于普通人来说还是麻烦了点。希望未来能慢慢加上吧
