Singapore to San Francisco
17h 17mgate to gate
The flight from Singapore Changi Airport (SIN) to San Francisco International Airport (SFO) covers 13,582 km (8,439 miles) and takes approximately 17h 17m gate to gate for a typical jet.
The route heads north-east on an initial great-circle bearing of 43°, passing near 40.9° N, 155.7° E at its midpoint.
Bearing 43° north-east Midpoint 40.9° N, 155.7° E Model 805 km/h + 25 min
SOURCE·OurAirports + great-circle computation·REVIEWED JUL 2026
How this is worked out
- Take both airports' published coordinates from OurAirports — nothing here is scraped from another flight site.
- Great-circle distance by haversine on a mean earth radius of 6,371.0088 km: 13,582 km.
- Airborne time = that distance ÷ 805 km/h, a representative jet cruise speed: 16h 52m.
- Add a flat 25 minutes for pushback, taxi, climb, descent and taxi-in — the reason a 400 km hop is never half an hour: 17h 17m gate to gate.
- Winds, aircraft type and airline schedule padding are not modelled. The cruise-speed table shows how much that assumption is worth.
13,582 km / 805 km/h = 16h 52m airborne
+ 25 min ground = 17h 17m gate to gate
SOURCE·OurAirports + great-circle computation·REVIEWED JUL 2026
The same route, plotted on a world grid
The strip above gives the route its length and its shape. This gives it a position: latitude and longitude only, no coastlines, because a hand-drawn coastline would be decoration pretending to be data. On a flat grid the shortest path looks bent; on a globe it is straight.
Flight time at different cruise speeds
Aircraft type, winds and routing all move the real number. This is the same distance flown at different speeds, plus the 25-minute ground and climb allowance.
| Typical of | Cruise speed | Airborne | Gate to gate |
|---|---|---|---|
| Turboprop / regional | 550 km/h | 24h 42m | 25h 07m |
| Narrowbody jet (A320, 737) | 780 km/h | 17h 25m | 17h 50m |
| Widebody jet (777, 787, A350) | 900 km/h | 15h 05m | 15h 31m |
| Private jet (Gulfstream) | 850 km/h | 15h 59m | 16h 24m |
Headwinds on an eastbound long-haul routinely add 30–60 minutes; the same route westbound can be quicker. Airlines publish schedules with padding built in.
SOURCE·OurAirports + great-circle computation·REVIEWED JUL 2026
Both airports
| SIN | SFO | |
|---|---|---|
| Airport | Singapore Changi Airport | San Francisco International Airport |
| City | Singapore | San Francisco |
| Country | Singapore | United States |
| ICAO | WSSS | KSFO |
| Coordinates | 1.3502, 103.994 | 37.6198, -122.3748 |
| Elevation | 22 ft | 13 ft |
Every figure on this plate is geometry. The shape of the earth is knowable; the airline's schedule is not.
Questions this plate answers
How long is the flight from Singapore to San Francisco?
A non-stop flight from Singapore (SIN) to San Francisco (SFO) takes about 17h 17m. The great-circle distance is 13,582 km (8,439 miles, 7,333 nautical miles), flying north-east on an initial bearing of 43°.
How far is Singapore from San Francisco?
13,582 kilometres in a straight line over the earth's surface — 8,439 miles or 7,333 nautical miles. Actual flown distance is usually 2–5% longer because aircraft follow airways, avoid weather and route around restricted airspace.
Is there a non-stop flight between SIN and SFO?
This page calculates the direct-line time and distance; it does not track airline schedules. At 13,582 km the route is within reach of long-range widebodies, though not every city pair is served non-stop. Check an airline or booking site for what is actually scheduled.
What should I expect on a 17h 17m flight?
Anything past six hours is a long-haul flight: expect at least one meal service, a significant time-zone shift, and enough sitting that circulation and hydration start to matter. Cabin altitude, dry air and disrupted sleep do more damage to a training routine than the flight itself.
Airport coordinates from OurAirports (public domain). Distance is a great-circle calculation; flight time uses the model described on the method page. Flight times are great-circle estimates for planning only — always check the airline's published schedule.
