San Francisco to Singapore (SFO–SIN): distance and flight time

Flight time each way

SFO → SIN

17 h 45 min

Estimated gate-to-gate scheduled time. Initial heading 301° (WNW).

Leave San Francisco Sat 7 Nov, 10:00 local → arrive Singapore Sun 8 Nov, 19:45 local +1 day.

SIN → SFO

15 h 25 min

Estimated gate-to-gate scheduled time. Initial heading 43° (NE).

Leave Singapore Sat 7 Nov, 10:00 local → arrive San Francisco Sat 7 Nov, 09:25 local.

SIN-bound flights are the slower direction by about 135 minutes in our estimate: the route runs mostly east–west through latitudes where the prevailing westerly winds at cruise height are strong, so heading east rides a tailwind and heading west fights a headwind. How we estimate it.

Distance

Great-circle distance	13,582 km · 8,439 mi · 7,333 nmi
Initial heading	301° (WNW) from SFO; 43° (NE) from SIN
Farthest from the equator	47.4°N — the path arcs north of both airports
Crosses	the 180th meridian (International Date Line area)
Share of the longest possible trip	68% of the 20,015 km to the far side of the Earth

Time zones and jet lag

SFO	America/Los_Angeles — UTC−7 now; UTC−8 standard time, UTC−7 during daylight saving time
SIN	Asia/Singapore — UTC+8 now; UTC+8 all year (no daylight saving time)
Difference	Singapore is 15 hours ahead of San Francisco today; +16 h in January and +15 h in July because daylight saving time starts and ends on different dates (or not at all).

Jet lag, flying SFO → SIN. The clock change is 15 hours, but to your body that is a shift of 9 hours the other way. Your body clock has to move 9 hours later, like a westward trip. A common rule of thumb is that the body clock adjusts by roughly one time zone a day, so expect up to about 9 days to fully adjust. Shifting later (as here) is usually the easier direction; evening daylight at the destination helps. Flying the other way, the shift is reversed.

General information, not medical advice.

The two airports

SFO San Francisco International AirportSan Francisco, United States · longest runway 11,870 ft3,618 m

SIN Singapore Changi AirportSingapore, Singapore · longest runway 13,123 ft4,000 m

More routes from SFO and SIN

LAXSFO Los Angeles – San Francisco 543 km338 mi · 1 h 45 min SFOORD San Francisco – Chicago 2,964 km1,842 mi · 4 h 05 min JFKSFO New York – San Francisco 4,152 km2,580 mi · 6 h 20 min SFOLHR San Francisco – London 8,616 km5,354 mi · 10 h 20 min SFOPEK San Francisco – Beijing 9,494 km5,899 mi · 12 h 40 min SFOSYD San Francisco – Sydney 11,950 km7,425 mi · 15 h 10 min SINKUL Singapore – Kuala Lumpur 297 km185 mi · 1 h 25 min SINDPS Singapore – Bali (Denpasar) 1,672 km1,039 mi · 2 h 55 min SINBOM Singapore – Mumbai 3,922 km2,437 mi · 5 h 35 min SYDSIN Sydney – Singapore 6,293 km3,911 mi · 8 h 30 min CDGSIN Paris – Singapore 10,724 km6,664 mi · 12 h 30 min SINJFK Singapore – New York 15,341 km9,532 mi · 18 h 30 min

Routes of a similar length

ATLJNB Atlanta – Johannesburg 13,583 km8,440 mi · 15 h 55 min DXBLAX Dubai – Los Angeles 13,400 km8,327 mi · 16 h 25 min DFWSYD Dallas–Fort Worth – Sydney 13,808 km8,580 mi · 17 h 25 min IAHSYD Houston – Sydney 13,836 km8,597 mi · 17 h 25 min

Need a different pair? The flight-time calculator works for any two of 3,245 airports. Not covered: which airlines fly this route, schedules, fares and live status — that data is proprietary and we don’t guess it.

Photos on airport pages are credited there. Estimates are rounded to 5 minutes; typical error about 13 minutes (validation).

SFO San Francisco ⇄ SIN Singapore