Does LH fly the 748 and 744 on specific routes on a regular basis?

I'm a SEA-based Delta flyer and I booked a KE flight from SFO-ICN for Dec/ Jan specifically because it is on the 748. Found out today that the flight has been split into twice daily 77Ws! Bummer, now I am stuck with the SEA-SFO detour! At least I got the business tickets relatively cheap!

Anyway, my goal is to fly the 748 in the upper deck, and the 744 nose section. I heard that LH schedules the 744 on domestic rotations? Where does LH fly the 748 from the USA?

I am planning for a trip probably in Spring or early Summer. I know it is a long time away, but I just wanted to get an idea which routes to watch.

Thanks for any info!