Awesome, thanks for the responses you guys. My mission is to get two tickets for each trip, one to Asia one to South America.

For AA, I'm going to try to do a JFK - SFO (few days stopover to see family) -HND or HKG. If I wanted to, my understanding is I may be able to use JFK again as a stopover for a free one-way to another international city, since each could be a one-way w/ stopover. EDIT: let me qualify the last part: I'd do one one-way from JFK - SFO (stopover) - HKG, and another one-way HKG - SFO - JFK (stopover) - LON...woul this work?

For UA, I'm going to try to do a JFK - GIG (or another LA region country as a stopover for a week) - EZE, then EZE - JFK.

I have around 120k miles in each, so these would have to be saver awards in economy, but timing/economy really isn't an issue.

If I could come out with the above trips I'd be incredibly happy...if I could also end up with two one-ways to London for the next year, I'd be ecstatic. Sounds like this is plausible, so time to plan the dates out and hop on the phone.