Great-circle route SIN ↔ SFO. Faint dots are other airports, for geographic context. Download this map — free to reuse with a link back to this page.
Frequencies below are per direction, from our most recent schedule sample.
| Direction | Frequency | Days | Airlines |
|---|---|---|---|
| SIN → SFO Singapore to San Francisco |
28/wk | Daily | Singapore Airlines, United Airlines |
| SFO → SIN San Francisco to Singapore |
28/wk | Daily | Singapore Airlines, United Airlines |
Where a direction shows “—” we track it as an operating nonstop but hold no schedule sample for it — we would rather show nothing than guess.
In 2025, airlines reported 486,565 passengers on 2,100 flights between SIN and SFO — about 1,334 a day — filling 83% of the 587,964 seats flown. United Air Lines Inc. carried the most passengers (60%).
Source: US DOT T-100 segment reports — actual airline-reported traffic, scheduled service only, both directions combined. Cargo and charter flights excluded.
2 airlines fly the SIN–SFO nonstop, including Singapore Airlines, United Airlines.
Recent scheduled departures on this route have used the Boeing 787-9, Airbus A350-900.
Aircraft assignments change by season and by time of day.
On a long east–west route like this one the two directions do not take the same time. Aircraft flying eastbound ride the mid-latitude jet stream and typically arrive earlier than the westbound leg, which flies into it. The difference is commonly 30 to 90 minutes on transatlantic and transpacific flights, and it varies by season. The estimate above does not model wind — treat it as a midpoint and check the airline's own timetable for the block time on your date.
The distance between Singapore Changi Airport and San Francisco International Airport is 8,439 miles, or 13,581 kilometres.
| Great-circle distance | 8,439 mi |
| Kilometres | 13,581 km |
| Nautical miles | 7,333 nmi |
Measured airport to airport. The actual track is longer — aircraft follow airways, avoid restricted airspace and route around weather.
Yes. 2 airlines fly the route nonstop, with about 56 departures a week across both directions. The route is in our live nonstop dataset, last seeded 2026-07-07.
About 16h 39m in the air. That is a great-circle estimate from the 8,439-mile distance, not a scheduled block time — an airline's published time will differ by roughly 15 to 45 minutes depending on routing, winds and taxi.
About 28 a week from Singapore to San Francisco and 28 a week from San Francisco to Singapore, from our most recent schedule sample.
Singapore Airlines, United Airlines.
In 2025, airlines reported 486,565 passengers on 2,100 scheduled flights between SIN and SFO — about 1,334 a day — filling 83% of the seats flown. Source: US DOT T-100 segment reports, both directions combined.
Recent scheduled departures have used the Boeing 787-9, Airbus A350-900. Assignments change by season and by time of day.
