Cheap Flights from San Francisco to Singapore from US$367

Frequently Asked Questions

• What are the cheapest flights from San Francisco to Singapore (SFO-SIN)?

  Based on Trip.com data, United Airlines offers one-way fares as low as US$367 on Cheapest nonstop routes (e.g. SFO to SIN on Thu, Sep 10), while Air China offers Cheapest nonstop round-trips from US$701 departing on Wed, Oct 21 and returning on Fri, Oct 23.

• Which airlines offer direct flights from San Francisco to Singapore?

  At the moment, you can catch a nonstop flight from San Francisco to Singapore with the following airlines, including: United Airlines Singapore Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.

• How long is a flight from San Francisco to Singapore?

  It takes about 16 hours 25 minutes to fly from San Francisco to Singapore.

• When is the best time to book flights from San Francisco to Singapore?

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from San Francisco to Singapore is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

• How many flights are there per week from San Francisco to Singapore?

  Based on Trip.com data in the past 4 weeks, there is 24 flight per week flying from San Francisco to Singapore. You can check the weekly schedule for popular airlines on this route below: United Airlines: S/M/T/W/T/F/S -- UA029 (12:48) United Airlines: S/M/T/W/T/F/S -- UA001 (23:28) Singapore Airlines: S/M/T/W/T/F/S -- SQ031 (12:05)

• How can I find the best deals on flights from San Francisco to Singapore?

  To find best deals on flights from San Francisco to Singapore, you can use various tools on Trip.com:
  · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Thu, Sep 10, with one-way flights priced at just US$367.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is United Airlines.
  · Set up price alerts to easily monitor ticket prices without having to check every day.
  · Check Trip.com flight deals and promo codes frequently.
  · Avoid peak season unless you book very early. It seems the peak season for Singapore travel is around January.
  · Get exclusive promo codes for Trip.com app users.

• When are flight tickets from San Francisco (SFO) to Singapore (SIN) the cheapest?

  The cheapest months to fly from San Francisco to Singapore is September, when demand for travel is lower.

• Which upcoming date is cheapest to fly from San Francisco to Singapore on?

  After crunching the numbers on our September flight calendar, it's currently cheapest to fly from San Francisco to Singapore on September 7, 2026 with Singapore Airlines, with prices starting at US$324.

• Which airports fly into Singapore from San Francisco?

  You can land at any one of the following hubs in Singapore: Singapore Changi Airport (SIN), and Seletar Airport (XSP). Flying from San Francisco International Airport to Singapore Changi Airport (SFO-SIN) is by far the most common option on this route.

• Is there any time difference between San Francisco and Singapore?

  The time difference between Singapore and San Francisco is 16h.

• How do I change or cancel my ticket from San Francisco to Singapore?

  Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

• What is the average cost of a one-way flight from San Francisco to Singapore?

  Based on Trip.com data for flights departing in the next 30 days, the average one-way fare from San Francisco to Singapore is US$623. Fares vary by travel date, airline and availability.

• What is the average cost of a round-trip flight from San Francisco to Singapore?

  Based on Trip.com data for travel in the next 30 days, the average round-trip fare from San Francisco to Singapore is US$1,149. The final price depends on the outbound and return dates, airline and fare conditions.

• How do I book flights from San Francisco to Singapore on Trip.com?

  Enter San Francisco and Singapore, choose your travel dates and passengers, then compare flights by price, duration and baggage. Select a fare, review the change and cancellation rules, enter traveler details and complete payment to receive your confirmation.