This is a new route airfare for Hong Kong Airlines so it's cheap. Hong Kong Airlines is one of Skytrax's certified 4 out of 5 stars rated.
Bad news and good news....the bad news is that it's not on google flights but the good news is that Hong Kong Airlines website is easy to use and easy on the eyes. After spending a llittle too much time on this deal trying to get dates, I've decided those who are interested in this deal can explore for their dates on own. I do have a sample screenshot from SFO-MNL, $437 round trip making 1 stop in Hong Kong.
Hong Kong Airlines Website [hongkongairlines.com]
Travel availability: very limited and scattered dates departing end of September thru early November.
My sample below is using Expedia [expedia.com]
to book SFO-MNL-SFO, Oct 1-10, 2018. You may also use Priceline [priceline.com]
to book. And of course, bundling hotel with airfare will save money.