$516 Cheap Singapore Airlines flights San Francisco (SFO) to Samui Intl. Airport (USM)

View $516 flight on Tue, Nov 25, 2025Opens in a new window

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$516 Cheap Singapore Airlines flights San Francisco (SFO) to Samui Intl. Airport (USM)

Prices were available within the past 7 days and start at $516 for one-way flights and $823 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Singapore Airlines
Tue, Oct 21 - Wed, Oct 29
SFO
San Francisco
USM
Koh Samui
$823 Roundtrip, found 14 hours ago
$823
Roundtrip
found 14 hours ago
Select Singapore Airlines flight, departing Tue, Oct 21 from San Francisco to Koh Samui, returning Wed, Oct 29, priced at $823 found 14 hours ago
Flights from San Francisco (SFO) to Samui Intl. Airport (USM)
Origin airport
San Francisco Intl.
Destination airport
Samui Intl. Airport
Airlines serving
British Airways, Cathay Pacific, China Airlines, EVA Airways, Japan Airlines, Qatar Airways, Singapore Airlines, Swiss International Air Lines, Turkish Airlines
Popular airline
Singapore Airlines
Distance
8177 mi

Frequently asked questions

How much is a Singapore Airlines flight from San Francisco Intl. Airport (SFO) to Ko Samui Airport (USM)?
Landing cheap one-way Singapore Airlines flights from SFO to USM from $516 on Expedia couldn't be simpler — just filter by "Price (lowest to highest)." Alternatively, check out our budget-friendly return fares from $823 for your next exciting adventure.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from SFO to USM with Singapore Airlines?
Look for one-way or return flights to Koh Samui in October or September. You could find a cheap fare with Singapore Airlines during these off-peak times.
What is the cheapest time to book flights from San Francisco Intl. Airport (SFO) to Ko Samui Airport (USM) with Singapore Airlines?
To grab cheap flights from SFO to USM with Singapore Airlines, start searching about one month before your intended departure. You can save 17% when you lock in your international tickets 18 to 29 days ahead instead of booking four to five months in advance. Another useful tip? Booking on Sunday can lead to average savings of 17% compared to Friday (the most expensive day).**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does Singapore Airlines fly nonstop from San Francisco Intl. Airport (SFO) to Ko Samui Airport (USM)?
Select our "Nonstop" filter when browsing for direct Singapore Airlines flights from SFO to USM. You can also compare other airlines offering the same direct route.
What is the earliest Singapore Airlines flight from SFO to USM?
To find the earliest departure from SFO to USM with Singapore Airlines, filter your search by "Early Morning" and "Morning." Booking an early flight generally means you're less likely to experience cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does Singapore Airlines fly into in Koh Samui?
Take a Singapore Airlines flight from San Francisco Intl. Airport (SFO) to Koh Samui, and you'll probably arrive at Ko Samui Airport (USM). This is the airline's primary hub in this city.
What kind of luggage can I take on a Singapore Airlines flight from San Francisco Intl. Airport (SFO) to Ko Samui Airport (USM)?
On a standard economy flight with Singapore Airlines from SFO to USM, you can bring 2 checked-in bags up to 50 lb with dimensions no larger than 31 inches x 29 inches x 78 inches in total. For carry-on, you're permitted 2 cabin bags weighing up to 15 lb and measuring no more than 45 inches. Size and weight restrictions can vary based on the cabin class you're in and airfare type. To make sure you're not hit with additional fees at the airport, check your Singapore Airlines booking or look up the airline's website before packing.
Why fly with Singapore Airlines from SFO to USM?
With a 5-star airline rating and top-tier customer service, Singapore Airlines is a top choice for many travelers heading from SFO to USM. What's more, if you're a Singapore Airlines KrisFlyer and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles, which can go toward future trips.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my Singapore Airlines flight from San Francisco Intl. Airport (SFO) to Ko Samui Airport (USM)?
In most cases, you can modify or cancel your flight, although there may be additional fees if you made your booking over 24 hours ago. Want to keep your options open? Make use of Expedia's "No cancel fee" or "Changes included" filter to find flights that won't penalize you if you need to adjust your plans. To make changes, visit "Trips," select your flight and click on "Manage Booking" for more details.

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*Available to One Key members.