Originally Posted by
trojanman
2. Minimize usage of miles for domestic J/F awards unless it's 3-class flagship service (762 SFO/LAX-JFK or 777 LAX-MIA). The return on your miles is between 3% - 4% in this case.
One case where this is a good use is for family/friends. Earning miles may well not be useful for them, and sitting in F, even domestic, is a nice gift.
Cheers.