Originally Posted by
mahasamatman
That's because the port call in Juneau is not a stopover. They would not be allowed to sell a cruise that goes from Vancouver to Juneau and then a separate cruise from Juneau to Anchorage.
The example was admittedly imperfect, but not for the reason you cite. UA does not offer any service from YYZ to YYT. Therefore, the cabotage issue you’re concerned about simply does not exist. Arcana about fare construction is irrelevant to the law. UA is allowed to sell a ticket for flights it would not be allowed to operate — end of story.
Originally Posted by
xliioper
Mileage flights are treated differently from revenue fares. Domestic US-48 and US-Canada fares do not allow stopovers, so it's not possible in this case. You can potentially book stopovers in EU on TATL fares, but cheapest fares often do not permit stopovers and you may have to book both a higher class fare that allows stopovers and pay a stopover fee. In many cases, it's cheaper to simply book intra-EU flights on separate partner tickets.
All of this is true, but none of it addresses the suggestion that the flight is failing to ticket because of a cabotage issue. There is no cabotage issue at play here.