The problem with travel agents and (some) low-cost carriers is you wouldn't be able to book via the UR portal to get the 1.5cpp. What's the aversion to award tickets? You could do the SJC-NRT-SGN-SEA (throwaway) + SGN-CDG with UR @ 1.5cpp then use 30k UR transferred to UA + $76 to book the CDG-SFO non-stop on 12/12 (it's available as an award). Total cost: ~113k UR + $76