Originally Posted by sbedelman

Just to prove my point regarding the harm AS will cause by not rerouting passengers in a timely manner I've just checked and some dates around Christmas are already heavily booked. In fact I can't get the same date I currently have SEA-CUN via LAX. So if its true that AS is insisting that I need to use MX then either I would have to change my date or travel with 2 stops instead of one.

While it is unfortunate that they choose to cancel SEA-CUN its within their right to do so (as long as they stopped taking bookings before making the decision). But they have an affirmative obligation to take reasonable actions to minimize the harm imposed by this decision and I'm of the opinion that would include, at a minimum, preparations and staff sufficient to rebook passengers in a timely manner.

And of course offering passengers the best available routing, regardless of carrier.