Originally Posted by
skimthetrees
You may be able to rebook online if both US-HND and HND-CTS are available at the time of booking, but in that case it might be better, If you have enough miles, to book a new trip US-CTS when F becomes available and then cancel the original booking.
Doing some T-14 searches for the transpacific F leg, and random dates for the HND-CTS leg using multi-city seems to only allow coach for the domestic leg. Even though J is available for HND-CTS when searched individually.
Edit: I see that's mentioned in the wiki. I have extra mileage to spare, so I'll run some experiments and report back.