How long is the flight from San Francisco to Singapore?

Non-stop flights on SFO → SIN are typically around 16.5 hours. Connecting itineraries add 3–8 hours depending on the hub and layover.

Which airlines fly from San Francisco to Singapore?

The main carriers on this route are Singapore Airlines, United. Codeshare and one-stop options add several more — the filter panel above shows every airline in the current fare set.

When is the cheapest time to fly from San Francisco to Singapore?

Historically the lowest fares land in February, March, September. Summer (mid-June through mid-August) and the Christmas / New Year window are always peak. Mid-week departures (Tuesday–Thursday) typically beat weekend prices by 10–20%.

How far ahead should I book San Francisco to Singapore?

Six to ten weeks ahead is the sweet spot for this route. Inside three weeks, fares tend to spike as airlines sell to last-minute business travellers. Award availability often opens 10–11 months out if you're booking on miles.

Can I book directly on destination.com?

The Book button on each fare opens the airline or OTA (Trip.com, Kiwi, Expedia, Booking, Priceline, etc.) that's actually selling that ticket. You complete payment there at the same price you saw here — we never add a markup.

SFO → SIN

San Francisco to Singapore flights.

Live cached fares on San Francisco (SFO) → Singapore (SIN), refreshed every 30 minutes. Non-stop and connecting itineraries side by side — compare airlines, times and stops, then book in one click.

Flying time
~16.5h non-stop
Airlines
Singapore Airlines, United
Cheapest months
February, March, September

Flex dates · cheapest nearby

Loading prices…

No cached fares for exactly 2026-06-08 → 2026-06-15. Showing recent fares on SFO → SIN — pick a different date in the calendar above or run a live search.

San Francisco → Singapore · 3 fares

Cached from Travelpayouts · filter & sort below

Showing 3 of 3 results

Cheapest
Air India · AI 174
OutboundSFO → SINTue, Jun 9 · 5:30 PM· 26h 45m· 1 stop
$632
one-way
Book →
Air India · AI 174
OutboundSFO → SINMon, May 18 · 5:30 PM· 28h 30m· 1 stop
ReturnSIN ← SFOSun, May 24 · 5:10 AM· 22h 20m· 1 stop
$909
total round-trip
Book →
Asiana Airlines · OZ 211
OutboundSFO → SINSun, May 17 · 6:20 AM· 19h 25m· 1 stop
ReturnSIN ← SFOFri, May 22 · 11:30 PM· 17h 10m· 1 stop
$1,078
total round-trip
Book →

Try a nearby airport

Thin routes often have more options from a neighbouring airport.

Oakland (OAK) → Singapore (SIN)

nearby origin

San Jose (SJC) → Singapore (SIN)

nearby origin

About San Francisco → Singapore

SQ A350 non-stop is ~17h and one of the world's longest flights. Economy sells out — book 3+ months out.

Typical non-stop flying time is around 16.5 hours. Major carriers on this route include Singapore Airlines, United. Fares are usually cheapest in February, March, September — book 6–10 weeks ahead and avoid school-holiday peaks (late June–August, Christmas–New Year) for the best pricing.

Month-by-month price guide: San Francisco to Singapore

Live cheapest round-trip fare cached on SFO → SIN for each of the next 12 months. Tap any month and run a live search to confirm.

Apr
No data
May
Shoulder
from $909
Jun
No data
Jul
No data
Aug
No data
Sep
No data
Oct
No data
Nov
No data
Dec
No data
Jan
No data
Feb
No data
Mar
No data

Cheapest next 12 months: May from $909 round-trip. Run a live search →

Booking window tip

Long-haul fares are most predictable when booked 10-16 weeks ahead. Inside six weeks expect sharp increases, especially in premium cabins. If you're paying with miles, search 330+ days ahead when award inventory first loads.

Questions, answered

How long is the flight from San Francisco to Singapore?
Non-stop flights on SFO → SIN are typically around 16.5 hours. Connecting itineraries add 3–8 hours depending on the hub and layover.
Which airlines fly from San Francisco to Singapore?
The main carriers on this route are Singapore Airlines, United. Codeshare and one-stop options add several more — the filter panel above shows every airline in the current fare set.
When is the cheapest time to fly from San Francisco to Singapore?
Historically the lowest fares land in February, March, September. Summer (mid-June through mid-August) and the Christmas / New Year window are always peak. Mid-week departures (Tuesday–Thursday) typically beat weekend prices by 10–20%.
How far ahead should I book San Francisco to Singapore?
Six to ten weeks ahead is the sweet spot for this route. Inside three weeks, fares tend to spike as airlines sell to last-minute business travellers. Award availability often opens 10–11 months out if you're booking on miles.
Can I book directly on destination.com?
The Book button on each fare opens the airline or OTA (Trip.com, Kiwi, Expedia, Booking, Priceline, etc.) that's actually selling that ticket. You complete payment there at the same price you saw here — we never add a markup.

Other popular routes

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