How long is the flight from San Francisco to Singapore?

A nonstop flight from SFO to SIN takes approximately 17 hours and 30 minutes westbound. The return is shorter at around 15 hours 45 minutes.

Which airlines fly nonstop from San Francisco to Singapore?

Singapore Airlines and United Airlines both operate nonstop service from SFO to SIN.

What is the cheapest time to fly San Francisco to Singapore?

February (after Chinese New Year), March, and September–October offer the lowest fares.

Is the Singapore Airlines nonstop worth the premium?

For most travelers, yes. Singapore Airlines consistently ranks as the world's best airline. The fare difference vs. United is often minimal through consolidator channels.

Does Camli offer first class on San Francisco to Singapore?

Yes — Singapore Airlines First Class and Business Class fares are available through our consolidator network at significant discounts. Call +1-(855)-919-6470.

Cheap Flights from San Francisco to Singapore

San Francisco to Singapore is a premier transpacific route connecting the Bay Area's tech hub to Southeast Asia's financial capital. With Singapore Airlines operating one of the world's longest nonstop flights on this corridor and United offering competitive alternatives, Camli's consolidator network delivers wholesale fares that save travelers 40–60% — particularly on premium cabins.

Route Overview: San Francisco to Singapore

Route	San Francisco (SFO) → Singapore (SIN)
Duration	Approximately 17 hours 30 minutes nonstop
Distance	~8,450 miles
Airlines	Singapore Airlines (nonstop), United Airlines (nonstop), Cathay Pacific (via HKG), Japan Airlines (via NRT)
Nonstop	Yes — Singapore Airlines and United operate nonstop SFO–SIN
Busy Season	June–August (summer), December–January (holidays), Chinese New Year

Best Time to Fly

Cheapest months: February (post-CNY), March, September, and October offer the lowest fares. Avoid June–August summer peak and the December holiday season.

Best days: Tuesday and Wednesday departures offer the best pricing. Avoid Friday departures which carry a premium from business travelers.

Booking window: Ultra-long-haul sweet spot: 10–16 weeks before departure. Business/First class consolidator fares: Book 8–12 weeks ahead. Last-minute premium deals: Call +1-(855)-919-6470.

Travel Tips

Singapore Airlines vs United: Both airlines fly SFO–SIN nonstop. Singapore Airlines is consistently rated the world's best airline with superior service, while United often has lower base fares.
Premium Economy Sweet Spot: Singapore Airlines Premium Economy on this 17.5-hour flight offers exceptional value — wider seats, better meals, and priority boarding at roughly 40% of business class prices.
One-Stop Can Be Cheaper: Routing via Tokyo (NRT) on Japan Airlines or Hong Kong (HKG) on Cathay Pacific adds 4–6 hours but can save $200–400 in economy.
Business Class Consolidator Rates: Singapore Airlines Business Class is available through Camli's consolidator network at 45–60% below published fares on this route.
Stopover Programs: Japan Airlines offers free Tokyo stopovers, and Singapore Airlines has a Singapore Stopover Holiday package. Turn your journey into a multi-city trip.

Frequently Asked Questions

How long is the flight from San Francisco to Singapore?: A nonstop flight from SFO to SIN takes approximately 17 hours and 30 minutes westbound. The return is shorter at around 15 hours 45 minutes.
Which airlines fly nonstop from San Francisco to Singapore?: Singapore Airlines and United Airlines both operate nonstop service from SFO to SIN.
What is the cheapest time to fly San Francisco to Singapore?: February (after Chinese New Year), March, and September–October offer the lowest fares.
Is the Singapore Airlines nonstop worth the premium?: For most travelers, yes. Singapore Airlines consistently ranks as the world's best airline. The fare difference vs. United is often minimal through consolidator channels.
Does Camli offer first class on San Francisco to Singapore?: Yes — Singapore Airlines First Class and Business Class fares are available through our consolidator network at significant discounts. Call +1-(855)-919-6470.