So, pulling it all together, the target itin looks to be: LHR-DEL-HKG//PEK-HKG-BKK-HKG-(x)JFK-EZE-SCL-IPC-SCL-LIM-JFK-WAS-JFK-MAD-TLV//ATH-LHR

I switched EZE to the front end of the trip because I will be there in April-May, and Argentina gets cold earlier than Peru. Other than that, this is directly from the above posts.

If I were to do this plan, are there any specific optimizations you all would suggest? I've read a lot on these boards about taking BA or Cathay long-haul instead of AA, and about fuel surcharges and the like. Are there any specific tips of hints you have about these flights that would reduce cost and increase enjoyment (best carriers? best flights? best way to take advantage of codeshares?)

In regards to previous comments that were made about using One World for this trip ... a big part of the reason I'm doing this is because it allows me to book all my flights at once without the hassle of cobbling together a bunch of one-ways from consolidators. Unfortunatly, I have very little flexibility outside of my time in China and South America. I'm planning on meeting people in various parts of the world (my dad in india, my gf in thailand) and i need to be back in the states at a specific time in May. The reason I am originating in LHR is that my gf and sister go to school there, and I'll visit them on the front and back legs of the trip. In any case, your suggestions and insights are appreciated nonetheless.