Originally Posted by
ttep
I'd put sfo, lax, san, las into matrix and hit search and for the first 3 pages got nothing direct.
1. SQ does not operate to SAN or LAS, so that's not going to show up in any search.
2. You keep saying "direct" when you actually mean "nonstop."
They are not the same thing; a nonstop flight is what it sounds like, a single flight from the origin to final destination, but direct flights can involve an intermediate stop on the way to the final destination as long as the flight number remains the same. SQ has both direct and nonstop flights to California, both on a daily basis (SFO: one nonstop, one direct via HKG; LAX: two direct, one each via ICN and NRT).
Just spend some time on singaporeair.com or Google Flights and you'll find the various options for SFO and LAX.