I've got some free time until the early part of Nov and would love to rack up some elite qualifying miles at a reasonable rate.

I just strung together a nice domestic starter run (ORD-LAX-MIA-JFK-LAX-ORD) for $550 but, AA.com keeps barfing when I try to book it (suspicious).

Anyhow, I thought I'd ask the experts here, while I go back and rebuild it for the 5th time....where should I be looking, outside the lower 48, to do my next MR?

I'd like to keep individual tix under $600 if possible