This SFO-SIN routing in Premium Economy is currently pricing at 65,000 MileagePlus miles with minimal taxes. That's a nice discount from the ~80,000 miles United typically charges for this cabin and distance, saving you around 15,000 miles per ticket.
Availability looks strong for August 17, 2026, with plenty of seats showing at this price point. Premium Economy offers a meaningful upgrade over regular economy on the long haul to Southeast Asia—more legroom, better recline, and improved meal service can make the 17-plus hour journey considerably more comfortable.
August falls within peak summer travel season, so finding award space at below-average rates is worth noting if Singapore is on your family's list. The low $6 tax figure is also a welcome sight, as some international premium cabin awards can come with substantially higher fees.
One practical tip: United award pricing is dynamic, so this rate could shift. If this route and date work for your schedule, it's worth booking sooner rather than later. You can always cancel United awards for free if plans change.
How to book
Search and book directly through United's award search tool: https://www.united.com/en/us/book-flight/united-awards/search