Hi Jason
Without looking at the schedules, the routing permits LHR ... PHL-SFO-LAX-SEA-HNL, which nets 13,248 base miles all on UA metal.
I can't remember what the minimum sector earning is, but ORD-PHL is only 678mi.
I completed the MR I mentioned above without any problems, apart from BD calculating my silver renewal incorrectly, but I'm working on that.
As an irregular UA flyer, I though they were pretty good ... apart from the UK-based crews

but I don't have any nostalgia for the good old days
Good luck !