SFO to SIN Flights: 2026 Guide to Singapore Nonstop
United and Singapore Airlines fly SFO → Singapore nonstop. Carriers, fleet, OTP, and how to track these long-haul flights in 2026.
FlightyFlow Team·· 6 min read
The route at a glance
SFO to Singapore is one of the world's longest commercial flights at ~17 hours. Singapore Airlines flies the route on the A350-900ULR in two cabins (Business and Premium Economy only), and United flies it on the 787-9.
- Average flight time: 16h 50m westbound, 14h 50m eastbound
- Aircraft: A350-900ULR, 787-9
- Schedule: SQ daily, UA daily
Best of cabin
- Best business class: Singapore Airlines A350-900ULR Business (excellent rest, better food than UA).
- Best long-haul economy: UA Polaris is business; in main cabin SQ's main is meaningfully better.
Track your SFO ↔ SIN flight
FlightyFlow handles ultra-long-range flights well — predictive ETA accounts for the heavy fuel burn early, lighter cruise speed late, profile.
#SFO#SIN#Singapore#ULR#route guide
Track your next flight with FlightyFlow
Free on the App Store. Live aircraft, smart alerts, and beautiful flight pages — built for iPhone.