Find United Airlines(UA) 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.

It takes about 16 hours 20 minutes to fly 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.

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 -- UA001 (23:28) Singapore Airlines: S/M/T/W/T/F/S -- SQ033 (23:00) Singapore Airlines: S/M/T/W/T/F/S -- SQ031 (12:36)

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

After crunching the numbers on our August flight calendar, it's currently cheapest to fly from San Francisco to Singapore on August 9, 2026 with Singapore Airlines, with prices starting at US$333.

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

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

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.