Originally Posted by
UA-NYC
Whatever you do, make sure you book it as separate segments!
If a paid ticket, consider the more stylish (though longer) way to go, SQ IAH-DME-SIN.
Bingo. For confirmation, UA6 connects through NRT. Both segments are sCO 777.
If you're flying in J, it's not a bad flight, but nowhere near as good as SQ. If you're flying in Y, you'd be insane to NOT go SQ...