You about nailed it there, FWAAA.
AA is using their Latin operation to subsidize the rest of their network. I've said that for years. However, it is not just their Asian network that gets subsidized. In the first quarter, AA lost money in every region except for Latin America; in the 2nd quarter it was only Asia that was losing money. AA knows full well how important Latin America is to AA's profits which is why they will do all they can to remain as large as they can to prevent competitors from challenging them.
But it also doesn't change that AA has such a disproportionately large presence in Latin America compared to what any other carrier has in any other region and AA also has a US carrier monopoly from the largest gateway in the US to that region. Other carriers know that. Other carriers know that they haven't been able to challenge AA's mass in Latin America because of the lack of Open Skies agreements. Even if you or others want to argue that they have fallen within the past couple years, other carriers are waiting for the right opportunity to grow their presence to Latin America, including from MIA.
AA will be facing a convergence of 4 major competitive events within a 1-2 year period kicking off with the divestiture of the slots at DCA and LGA, although the Congressional letters indicate that the divestitures might not go exactly the way the settlement agreement states or with just a disproportionate amount of slots going to WN or B6 to use to large cities. The fall of the WA comes next. Competitors will be adding capacity in other key markets including on the east coast and in the western US. Add in WN's growth in Latin America and B6's continued addition of flights from FLL to Latin America. By next summer, DL and VS will be coordinating schedules to LHR under their JV. As AA is looking for fire extinguishers to try to manage all of these competitive incursions, it might be about time for competitors to start adding some new MIA-Latin America flights.
BTW, I believe B6 just added a round of new flights to Latin America from FLL. While NK didn't really succeed and had little effect on AA at MIA, B6 has the potential to be very different. B6 is perceived as a higher quality airline and also has the marketing power. Their new flight to LIM is reaching deep into AA's core S. America network. B6 has been very successful at taking share from AA in key markets throughout L. America and the Caribbean.
There will be multiple carriers looking for a bigger piece of Latin America over the next few years. On top of everything else that AA is having to do to pull off this merger, battling to protect their cash cow will take an enormous amount of energy and it is doubtful they can succeed at all they will try to do when 75% of the rest of the industry will be looking to stop the benefits AA/US is trying to gain from the merger and to extract major pieces of AA's hide.
robbed,
you can echo MAH's words if you want but the simple fact is that DL's Asian network is profitable and was the only US carrier network to Asia that was profitable even in the dead of winter 2013. The difference between DL and other carriers is that DL doesn't expect any region to subsidize any others on a sustained basis. DL has redeployed capacity out of Japan and may continue to do so and use lower cost aircraft like the new 333s to help match costs with revenues but DL is not giving up on NRT and they also have redeployed whatever capacity they are pulling out of Japan to other parts of Asia where they are doing very well.
UA loses money to Asia in the offpeak seasons because their costs are too high across their system. UA also lost money in every other region in the 1st quarter 2013 which is why they know they have to cut costs or end up back in BK. There are plenty of skeptics who aren't sure they can do it, esp. given that other carriers are targeting UA's bread and butter including VX' transcon flights, DL's SEA hub which challenges UA's west coast to Asia strength, and AA and DL's buildup of LAX.
Also, US has done well with CLT-GIG but they are losing a lot of money on their CLT-GRU flight because of poor slot timings. AA has plenty of good slot times so it won't take too long before AA/US either has to get good slot times or AA has to give up one of its GRU slot times. US' current schedule at GRU is not sustainable financially.
http://airlineroute.net/2013/11/16/us-gru-s14/
remember also that US' costs throughout its network will go up as part of the merger. US' profitability will be questioned and it is also very unclear how AA wants to use CLT in a region that siphons traffic off of MIA at costs that are well below what AA charges. It is well known that US' flights from the US to Brazil are some of the cheapest alternatives.