Airfares to Asia have been coming down for months now due to mostly Chinese airlines deploying capacity on US routes.
Sichuan Airlines now has lots of dates for Los Angeles to Shanghai (via Chengdu) for $368. We saw it in Oct/Nov/Dec/Jan. This POTENTIALLY earns 100% with China Southern Airlines frequent flyer program.
The fares comes up using our flight search (Sample dates Dec 1-11).
Oddly enough the booking links come from the Colombian version of edreams.
Great way to do a review for a new airline.
You will also need a visa for China for this trip.