---
title: "San Francisco to Singapore (SFO → SIN): distance and flight time · Orbit"
description: "San Francisco to Singapore is 13,582 km (8,439 mi) great circle, an estimated 17h 23m in the air. The route, what it flies over, and why the short way is not the straight line on a map."
url: https://orbitflights.app/routes/sfo-to-sin
---

SFO → SIN

# San Francisco to Singapore: distance, flight time and the route it really takes

San Francisco to Singapore Changi is 13,582 km of great circle — 8,439 mi — and an estimated 17h 23m in the air. It crosses from North America to Asia.

**Great circle**
13,582 km
8,439 mi

**Estimated in the air**
17h 23m
block time

**Furthest from equator**
47.4°N
at 28% along

**One lap of Earth**
33.9%
of 40,075 km

Of the [292 routes catalogued here](https://orbitflights.app/routes), this is the 17th longest.

The San Francisco to Singapore route drawn as a great circle arc on a globe

## What the aircraft actually flies over

From San Francisco the path crosses 13,514 km of open water.

The furthest the great circle gets from the equator is 47.4°N, 28% of the way along.

Flying the line that looks straight on a Mercator map — one constant compass bearing — would cover 14,292 km. That is 711 km further, about 5% more, and roughly 53m of extra flying.

Leaving San Francisco the aircraft points north-west (301°); it arrives into Singapore heading south-west (223°). That is 79° of drift without a single turn — the compass moves because the path is a curve on a sphere, not because the aircraft does.

One economy seat on it is about 1.92 t of CO₂e each way, counting non-CO₂ warming.

[SFO–SIN carbon footprint →](https://orbitflights.app/tools/flight-carbon-calculator?from=SFO&to=SIN) [Map this route →](https://orbitflights.app/tools/flight-route-map?r=SFO-SIN)

From

SFO

## San Francisco

San Francisco, United States · North America

37.6°N, 122.4°W

[SFO airport →](https://orbitflights.app/airports/sfo) [Flights to San Francisco →](https://orbitflights.app/flights-to/san-francisco)

To

SIN

## Singapore Changi

Singapore, Singapore · Asia

1.4°N, 104.0°E

[SIN airport →](https://orbitflights.app/airports/sin) [Flights to Singapore →](https://orbitflights.app/flights-to/singapore)

## San Francisco to Singapore, asked and answered

**How far is San Francisco to Singapore?**
San Francisco to Singapore (SFO to SIN) is 13,582 km, or 8,439 mi, measured as great circle distance between the two airports.

**How long is the flight from San Francisco to Singapore?**
About 17h 23m in the air. That is an estimate from the distance at a typical airliner block speed, plus half an hour for taxi, climb and descent; published schedules vary with winds and routing.

**What route does a San Francisco to Singapore flight take?**
The great circle passes over 13,514 km of open water. It reaches 47.4°N at its furthest from the equator.

## Where these numbers come from

Distances are computed from the two airports’ own coordinates, not looked up from published routes. Times are estimates, not schedules.

[Why the shortest path is a curve →](https://orbitflights.app/blog/great-circle-routes-explained)

## Flown this one?

Orbit logs it in two taps and draws the arc on your own globe, along with every other flight you can remember. Free for your first 15.

[Download now](https://play.google.com/store/apps/details?id=com.qwertybit.orbit)

## Nearby routes

[BLR → SFO Bangalore to San Francisco 13,988 km](https://orbitflights.app/routes/blr-to-sfo) [LAX → SIN Los Angeles to Singapore 14,102 km](https://orbitflights.app/routes/lax-to-sin) [SIN → LAX Singapore to Los Angeles 14,102 km](https://orbitflights.app/routes/sin-to-lax) [DEL → SFO Delhi to San Francisco 12,382 km](https://orbitflights.app/routes/del-to-sfo) [SIN → EWR Singapore to Newark 15,337 km](https://orbitflights.app/routes/sin-to-ewr) [SIN → JFK Singapore to New York 15,341 km](https://orbitflights.app/routes/sin-to-jfk)

## Further reading

[How many miles do you have to fly around the world?](https://orbitflights.app/blog/how-many-miles-to-fly-around-the-world) [What is on the exact opposite side of the world?](https://orbitflights.app/blog/opposite-side-of-the-world) [What's actually worth counting in a flight log](https://orbitflights.app/blog/what-is-worth-counting-in-a-flight-log)

---
Markdown copy of https://orbitflights.app/routes/sfo-to-sin for language models and agents. Site index: https://orbitflights.app/llms.txt