More Videos:

Does LAX Hold the Key to American Airlines' Future in Asia?

Tickers in this article: AAMRQ DAL LCC UAL

LOS ANGELES ( TheStreet) -- Merger or no merger, American needs to get stronger in Asia and Los Angeles International Airport may offer its best hope to do that.

But LAX, despite holding vast advantages as an Asian gateway, is a tough place to bulk up because it is both intensely competitive and geographically impaired.

Delta and United , American's primary competitors, benefit not only from the post-World War II treaties that offered predecessors Northwest and Pan Am access to Asia, but also from strong positions at the other key West Coast airports -- San Francisco International and Seattle Tacoma International.

San Francisco is so strong a hub that United plans to try a new airplane, the Boeing 787 Dreamliner, to fly to Chengdu, China, which has never before had non-stop service from the U.S.

Delta, meanwhile, is growing rapidly in Seattle, the closest major U.S. mainland airport to many Asia destinations. Delta said last week it will add 11 new domestic flights from West Coast cities (including Los Angeles) to Seattle in order to feed its six daily non-stops to Asia.

That leaves LAX, the third-busiest U.S. airport in 2012 with 64 million passengers, as well as the third-busiest U.S. international gateway after John F. Kennedy International and Miami International, as the best opportunity for a West Coast, Asia-oriented hub for American.

Unfortunately, it's tough to gain an edge at LAX, where four carriers -- the big three plus Southwest -- each have more than 10% of the traffic. According to airport figures for the first eight months of 2013, United had a 16.9% passenger share; American had 16%; Delta had 13.2%; and Southwest had 11.1%. In other words, every single domestic route presents a challenge, making it hard to build feed for international routes even as the vast amount of local Los Angeles traffic to Asia makes them seem alluring.

United's LAX hub offers about 200 daily departures to 65 destinations including three in Asia, while American's has about 160 daily departures to 51 destinations including two in Asia, Narita and Shanghai. Delta offers 125 daily departures to 38 destinations.

"American does need a strong anchor city on the West Coast, and the only one left that really matters is Los Angeles," said David Cush, a former American executive who is CEO of Virgin America, which ranks sixth at LAX with about 5% of passengers. "Los Angeles is a big market that is also a rich market, but it's complicated. It's been fragmented for a long time (and) it's as brutal as it can get in terms of competition. Several airlines have tried to claim it, and no one has been successful.

"I think American can, but you need to be patient when you expand in LA," Cush said, in an interview. "It takes a while for routes to mature; that's the lesson we all have to learn at LAX. There is no overnight success."