Domestic as in the lower 48? United has 777s to HNL all the time, and some hub-to-hub flights (for example, DEN-SFO). Every now and then you'll see a 747 ORD-SFO in the schedule, too. But that's really, really rare and it doesn't help that the 747 is retiring by the end of the year ( ). I want to say I've seen Delta run 777s from LAX/SFO to the east coast (JFK/ATL) but I could be wrong about that - 767s, at least.

Oh, and I believe that the 777-300ERs United is getting will start flying EWR-SFO soon!