Singapore (SIN) to San Francisco (SFO) cheap flight deal from $644 USD in economy class

SQSingapore Airlines

Round Trip•Economy

SIN

Singapore Changi Airport

Singapore, Singapore

SFO

San Francisco International Airport

San Francisco, United States

$1,377 USD

-53%$644 USD

Verified Sep 23, 2025 at 6:36 PM

September 2025

Today

Mon

Tue

Wed

Thu

Fri

Sat

Sun

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24$1,272 25$1,272 26$1,272 27$1,365 28$1,749 29$1,272 30$1,272 1$1,202 2$1,202 3$2,076 4$1,749 5$1,890

Rare Availability

9% of dates checked are available within 10% of the lowest price

Monday, September 29th, 2025

6 round-trip options

Returning

Sat, Oct 4, 2025•5 Day Trip

$2,100 USD

Google Flights

Returning

Sun, Oct 5, 2025•6 Day Trip

$1,272 USD

Google Flights

Returning

Mon, Oct 6, 2025•7 Day Trip

$1,272 USD

Google Flights

Returning

Thu, Oct 9, 2025•10 Day Trip

$1,478 USD

Google Flights

Returning

Fri, Oct 10, 2025•11 Day Trip

$2,100 USD

Google Flights

Returning

Sat, Oct 11, 2025•12 Day Trip

$2,100 USD

Google Flights