Originally Posted by
moondog
I'm 99% sure that US law applies in this case.
US protection will not apply on an itinerary containing only HKG-LHR.
From page 20 of
76 FR 23110
We also view our approach as striking the proper balance between protecting consumers on nearly all flights to and from the United States by requiring not just U.S. carriers but also foreign carriers to adopt and adhere to customer service plans, while ensuring that these requirements do not involve an extraterritorial application of U.S. law by limiting their application to foreign carriers to flights to and from the U.S., sales made within the U.S., and to the conduct of foreign carriers on U.S. soil.
But if you buy from an US-based OTA, you would be able to void the ticket out within a minimum window of 24 hours.