Not quite on subject here, but I've been 5 times in Singapore over the last 18 months and I am quite sure that the Air Canada website showed routes from YQB to SIN.

I need to go back in a few weeks and now that same search comes up empty and asks to call in. I don't mind calling in, just wondering what changed.

YYZ-SIN works ok. YUL-SIN also.

Thanks,

Keops