Originally Posted by
ermintrude
This and there used to be (and my still be) lots of R availability on this route as well.
Originally Posted by
findark
That being said, right now SFO/ICN is an excellent source of 747 O space

Fares are indeed cheap, but against a $2.5k h/r/t A fare I'll still take the 80k miles.
Originally Posted by
JHake10
With your strict flight and date requirements I'd get ExperFlyer account and set some alerts up and jump things as soon as they open up.
All of these. As a regular ICN-SFO flyer, my experience has been R is available on Tuesday/Wednesday, but practically never on Fridays and is hit or miss on Thursdays. Weekends are rough to find space as well.
I agree with the above saying you should set some alerts. It's how I get all the flights I want (that I know about in advance) for a good price/award.