United Airlines has nonstop flights from LAX to Singapore for $514 round trip for travel from March through May 2018. SkyTeam Airlines member Xiamen Airlines is slightly less at $485 via a two-stop itinerary through China.
United Airlines LAX – Singapore SIN – LAX
Singapore also works as a cheap departure city for flights to Australia with low cost airlines like Scoot.
Scoot Airlines Singapore – Gold Coast, Australia OOL – SIN