20k miles on CO, Tijuana to EZE. Saved myself close to $800 (price from LAX) and get a stopover in PTY.
Now my next mission is from SAN to JNB/CPT with flyer miles. That'll save me $1500 or there abouts. I'll obtain that sometime next year.
It all depends what you value. I'd rather fly coach and fly to JNB for free. Others would suck it up, pay the $$ and fly in F.
Last Minute tickets are still a good deal if they're to be found.