Originally Posted by UNITED959
Wrong. If you pay for biz, the segments that require you to travel on a domestic aircraft will be in First.
True, although the award tickets can be trickier. As noted on other threads, an award ticket in business on SQ gets you a coach ticket on their two class plane (except for LAX and JFK-SIN transpacific direct). Supposedly the same goes for SQ FFs who book on United in U.S.