Originally Posted by
Lost
Nope. If it violated cabotage you wouldn't be able to buy it.
Cabotage rules are more for the airline to worry about when selling tickets. It's not for a passenger to worry about when buying a ticket.
This is not a good way to look at it. While violation of so-called cabotage rules is an air carrier issue, it is the passenger who bears the immediate brunt of the violation because it is a violation of law to permit the passenger to board.. Unlike other violations, this can't simply be waived by the carrier just because it made an error.
In this case, it is unclear that JL has identified a US DOT issue. Perhaps it is Japan or Korea? Particularly if the third-party opaque website used some odd hidden-city ticketing to create a cheap fare.
Best to call JL immediately and ask what the specific problem is. Once you know what the issue is, then please post and let us know.