Originally Posted by
WineCountryUA
Yes, if purchased as ORD-SIN, UA895. You need to split into two flight segments. This is a "direct" flight issue.
There is a CRAPTON of issues with "Direct" flights
There is on from IAD-LAS that goes thru SFO as well, but I digress
I have found it MUCH easier to find R availability by doing a multi city (segment) search, then going up to a more general search and see when it disappears, then go back to the least granular and book it.