Got 80K miles; how should I book this flight?
I've got 80K miles and I want to do a round trip to Seoul from the U.S. I believe I have 3 options:
A. Book first class one-way and pay for the return flight in coach
B. Book business one-way and pay for the return flight in coach; save 20K miles for future use
C. Pay $2440 for roundtrip coach and then use 80K points to upgrade to business both ways
Which way should I do this?