For convenience, I tend to use the mileage monkey even though it is not technically as definitive (airline route map and expert flyer or ITA with aa+ in the advanced routing will do that). This shows 5 flights:
NRT-SIN/KUL/DEL (+CGK)
HND-SIN
I would guess they all have codeshare options (for connections to or from the US)
Last edited by zoombee; Aug 25, 2015 at 2:42 am