Originally Posted by
nancypants
indeed I believe the US approach is just to not allow it on foreign airlines unless there is an adequate stopover- now define adequate? I think Korean airlines enforce 96 hours in order to avoid being fined but I don’t believe that’s statutory
I think the issue is that only the passenger has evidence showing if it is cabotage or not, but it's the airlines which are fined for it, so on some "problem routes" like continental USA-Japan/Korea-Guam/Saipan, the airlines disallow short connections unless at least one flight is on a US airline as a precaution.