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United · Route guide

San Francisco to Singapore: United Airlines Route Guide

Everything you need to fly San Francisco to Singapore: when to go, who flies it, what it costs, and how to land well.

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1 airline on this route · Daily, Year-Round

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Airline

United

Aircraft

B787-9

Service

Daily, Year-Round

Region

Asia-Pacific

The route

This route connects the technology hub of Silicon Valley with the global financial center of Singapore. As one of the longest non-stop flights in United's network, it serves as a vital link for business and leisure travelers crossing the Pacific Ocean. Utilizing the advanced Boeing 787-9 Dreamliner, this service provides a direct connection that avoids the need for traditional layovers in North Asia.

Operating daily with Boeing 787-9 Dreamliner aircraft, United provides a consistent year-round connection between San Francisco International Airport (SFO) and Singapore Changi Airport (SIN). The flight covers over 8,400 miles, making it a premier ultra-long-haul service in the Asia-Pacific region.

This flight is a cornerstone of trans-Pacific travel, bypassing historical stopping points like Tokyo or Hong Kong. It supports deep economic ties between the US West Coast and Southeast Asia, offering the most efficient travel time for corporate travelers and providing a seamless gateway for tourists exploring the Malay Peninsula and beyond.

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Airports

Taking off, touching down.

Check-in, security, connections and getting into town at both ends of the flight.

Departure

San Francisco International Airport (SFO)

SFO

Check-in: Arrive at least 3 hours before departure for international trans-Pacific flights to allow for document verification.
Security: TSA PreCheck and CLEAR are available, though international evening banks can see increased wait times.
Connections: SFO offers excellent lounge access and free high-speed Wi-Fi throughout International Terminal G.

Arrival

Singapore Changi Airport (SIN)

SIN

On arrival: Complete your SG Arrival Card online up to 3 days before landing to speed up your immigration process.
Ground transport: The MRT, licensed taxis, and ride-hailing apps like Grab are easily accessible from all terminals.
Planning ahead: Changi is famous for its Jewel complex; consider visiting the Rain Vortex before heading to your accommodation.

Timing & fares

When it flies, what it costs.

Schedule & reliability

Schedule: Usually departs SFO in the late evening and arrives in SIN two days later in the early morning hours.
Duration: Westbound flights are typically longer due to headwinds, often exceeding 17 hours in the air.
Seasonality: Year-round demand remains high, with slight peaks during US summer and year-end holiday periods.
Time zones: Singapore is 15 to 16 hours ahead of San Francisco depending on the time of year and Daylight Saving Time.

Fares & booking

Booking window: The sweet spot for booking is typically 45 to 60 days before your departure date.
Cabin advice: Polaris Business Class is highly recommended for the lie-flat beds on a flight of this extreme duration.
Peak pricing: Fares spike significantly during the Chinese New Year period and the December holiday weeks.

Book at least 6 to 8 weeks in advance for the most competitive trans-Pacific fares.
Use United's FareLock feature if you need time to finalize your itinerary without losing the price.
Consider United Premium Plus for extra legroom and enhanced service on this ultra-long journey.

Peak season

December, January, and June

Shoulder season

April, May, September, and October

Off-peak season

Late October and November

Tours and experiences at either end

Vetted day trips and activities in Singapore and San Francisco, through our travel partner.

Browse tours

When to fly

Best Time to Fly San Francisco to Singapore

01
February to April
Generally the dry season in Singapore, offering the most pleasant weather for sightseeing.
02
September
Ideal for those attending the Singapore Grand Prix, though flight prices often increase.
03
October to November
Often a shoulder season with better availability and slightly lower fares.

Trip planning

Who this route suits best.

Business Travelers

Direct evening departure from SFO allows for a full day of work before flying to Asia's financial hub.

Leisure Explorers

Ideal starting point for a multi-city Southeast Asia tour covering Malaysia, Indonesia, or Thailand.

Tech Industry Professionals

The most efficient link between the Silicon Valley ecosystem and Singapore's growing tech sector.

Connections & alternatives

Bali (DPS)

A very popular vacation extension reachable via a short flight from Singapore Changi.

Kuala Lumpur (KUL)

Easily accessible via multiple daily flights or a scenic bus ride from Singapore.

Phuket (HKT)

A top choice for beach lovers with frequent direct connections from Singapore.

Field notes

Travel Tips for the San Francisco-Singapore Route

Visa & entry

United States citizens typically do not require a visa for social or business visits of up to 90 days.
Ensure your passport is valid for at least 6 months beyond your planned date of entry.
Submission of the electronic SG Arrival Card is a mandatory requirement for all travelers.

Airport transfers

Taxis are metered, highly regulated, and very reliable for getting anywhere in Singapore.
The MRT train system is the most cost-effective way to reach the city center and is connected directly to Terminal 2 and 3.
Private transfers and airport shuttles can be pre-arranged for a more personalized arrival experience.

Baggage & transit

Check your specific baggage allowance on your ticket as trans-Pacific rules can vary by fare class.
Pack an essentials kit in your carry-on to stay refreshed during the 17-hour flight.
If connecting, Singapore Changi offers world-class transit facilities including snooze lounges and showers.

Checklist

Valid Passport with 6 months validity
Completed SG Arrival Card
Noise-canceling headphones for the long flight
Universal power adapter for Singapore type G outlets

Carriers

Airlines Flying San Francisco to Singapore

United

Daily

Boeing 787-9 Dreamliner

FAQ

Common questions.

Straight answers about flying San Francisco to Singapore.

How long is the non-stop flight from SFO to Singapore?

The flight typically takes between 16 hours 20 minutes and 17 hours 30 minutes, depending on seasonal wind speeds.

What aircraft does United fly on the SFO to SIN route?

United primarily operates the Boeing 787-9 Dreamliner on this route, which features the Polaris Business Class cabin.

Is food included on the San Francisco to Singapore flight?

Yes, United provides multiple full meal services, mid-flight snacks, and a wide range of beverages throughout the journey.

Which terminal does United use at SFO for flights to Singapore?

United's international flights to Singapore generally depart from the International Terminal G at San Francisco International Airport.

Do I need a visa for a layover or visit in Singapore?

US citizens do not need a visa for visits under 90 days, but must complete an SG Arrival Card before passing through immigration.

Keep exploring

Where to next.

Structured data verified

Airports

San Francisco (SFO) (SAN)Singapore Changi Airport (SIN)San Francisco International Airport Singapore Changi Airport

Countries & layovers

United States Singapore San Francisco layover guide Singapore layover guide

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Three steps

1Log into your United MileagePlus account to view your flight history and earnings.
2Use the Borderly platform to log and visualize your trans-Pacific flight statistics and distance covered.
3Sync your travel itinerary with tracking apps to receive real-time updates on gate changes and delays.

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