Cheap Flights from San Francisco (SFO) to Samui Intl. Airport (USM) from HK$3,361~

View HK$3,361 flight on Fri, 8 Aug 2025Opens in a new window

Popular airlines from San Francisco Intl. Airport (SFO) to Samui Intl. Airport (USM)

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Find Cheap Flights from San Francisco (SFO) to Samui Intl. Airport (USM)

Prices were available within the past 7 days and start at HK$3,361 for one-way flights and HK$7,045 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Fri, 8 Aug - Fri, 15 Aug
SFO
San Francisco
USM
Koh Samui
HK$7,045 Return, found 5 days ago
HK$7,045
Return
found 5 days ago
Select United flight, departing Fri, 8 Aug from San Francisco to Koh Samui, returning Fri, 15 Aug, priced at HK$7,045 found 5 days ago
United
Fri, 8 Aug - Fri, 15 Aug
SFO
San Francisco
USM
Koh Samui
HK$7,105 Return, found 5 days ago
HK$7,105
Return
found 5 days ago
Select United flight, departing Fri, 8 Aug from San Francisco to Koh Samui, returning Fri, 15 Aug, priced at HK$7,105 found 5 days ago
United
Fri, 8 Aug - Fri, 15 Aug
SFO
San Francisco
USM
Koh Samui
HK$7,715 Return, found 5 days ago
HK$7,715
Return
found 5 days ago
Select United flight, departing Fri, 8 Aug from San Francisco to Koh Samui, returning Fri, 15 Aug, priced at HK$7,715 found 5 days ago
United
Fri, 8 Aug - Fri, 15 Aug
SFO
San Francisco
USM
Koh Samui
HK$8,029 Return, found 5 days ago
HK$8,029
Return
found 5 days ago
Select United flight, departing Fri, 8 Aug from San Francisco to Koh Samui, returning Fri, 15 Aug, priced at HK$8,029 found 5 days ago
United
Fri, 8 Aug - Fri, 15 Aug
SFO
San Francisco
USM
Koh Samui
HK$8,089 Return, found 5 days ago
HK$8,089
Return
found 5 days ago
Select United flight, departing Fri, 8 Aug from San Francisco to Koh Samui, returning Fri, 15 Aug, priced at HK$8,089 found 5 days ago
United
Fri, 8 Aug - Fri, 15 Aug
SFO
San Francisco
USM
Koh Samui
HK$8,475 Return, found 5 days ago
HK$8,475
Return
found 5 days ago
Select United flight, departing Fri, 8 Aug from San Francisco to Koh Samui, returning Fri, 15 Aug, priced at HK$8,475 found 5 days ago
United
Fri, 8 Aug - Fri, 15 Aug
SFO
San Francisco
USM
Koh Samui
HK$8,519 Return, found 5 days ago
HK$8,519
Return
found 5 days ago
Select United flight, departing Fri, 8 Aug from San Francisco to Koh Samui, returning Fri, 15 Aug, priced at HK$8,519 found 5 days ago
United
Fri, 8 Aug - Fri, 15 Aug
SFO
San Francisco
USM
Koh Samui
HK$8,535 Return, found 5 days ago
HK$8,535
Return
found 5 days ago
Select United flight, departing Fri, 8 Aug from San Francisco to Koh Samui, returning Fri, 15 Aug, priced at HK$8,535 found 5 days ago
Cathay Pacific
Fri, 8 Aug - Fri, 15 Aug
SFO
San Francisco
USM
Koh Samui
HK$17,341 Return, found 5 days ago
HK$17,341
Return
found 5 days ago
Select Cathay Pacific flight, departing Fri, 8 Aug from San Francisco to Koh Samui, returning Fri, 15 Aug, priced at HK$17,341 found 5 days ago
Qatar Airways
Fri, 8 Aug - Fri, 15 Aug
SFO
San Francisco
USM
Koh Samui
HK$22,289 Return, found 5 days ago
HK$22,289
Return
found 5 days ago
Select Qatar Airways flight, departing Fri, 8 Aug from San Francisco to Koh Samui, returning Fri, 15 Aug, priced at HK$22,289 found 5 days ago

Find the cheapest month to fly from San Francisco (SFO) to Koh Samui (USM)

August is typically the cheapest month to fly

From HK$6,066 - HK$12,081 per traveller.

Graph displaying average flight prices per month

San Francisco to Samui Intl. Airport route information
Origin airport
San Francisco Intl.
Destination airport
Samui Intl. Airport
Return price
HK$7,045
Distance
13084 km

Flights from San Francisco to Koh Samui

Book cheap flights from San Francisco (SFO) to Koh Samui (USM) on Expedia.com.hk. Find the best flight deals to destinations around the world for your next leisure or business travel on Expedia.com.hk.

Search for flights from San Francisco (SFO) to Koh Samui (USM) to find great flight deals suitable to your travel date and time. Expedia.com.hk flight booking search engine is simple to use and looking for cheap flights is as easy as a click of a mouse or on your mobile devices.

Be assured that you’re seeing the best price guaranteed! Our friendly customer service representatives are here to serve you 24 hours day to provide assistance and answer any questions that you may have about booking your San Francisco (SFO) to Koh Samui (USM) trip. Call us at 3077-4857 (direct number - 24 hours day for English).

Save more when combine your Koh Samui flight with a hotel for a package deal! Discover additional savings by booking in advance. Now you can find activities in Koh Samui and things to do in Koh Samui for your perfect vacation with Expedia Thing to Do.

If you would like to book flights to Koh Samui more flexibly, many prefer to purchase one-way tickets with options to take different airlines. A one way ticket to Koh Samui is HK$3,361 now!

 

Frequently asked questions

How much is a flight from SFO to USM?
Within the past 7 days on Expedia, for flights departing within the next year, the lowest price listed for a round-trip journey from San Francisco Intl. Airport (SFO) to Ko Samui Airport was HK$7,045. Cheap tickets don't stick around for long, so book yours today. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from San Francisco Airport to Samui Airport?
When it comes to cancellation fees, every airline has a different set of terms and conditions. If you decide to cancel your vacation, head to our Customer Service Portal.
How do I find cheap flights from SFO to USM that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for SFO to Ko Samui Airport flights, you'll see a "no change fees" filter for you to select.
How far is the flight from San Francisco Intl. Airport (SFO) to USM?
With a flight distance of 13,200 kilometers from San Francisco Intl. Airport (SFO) to Ko Samui Airport, this is a long-haul flight. Be sure to drink plenty of water and take a short walk down the aisle every so often.
Which airlines fly direct from SFO to Ko Samui Airport?
Flying nonstop between San Francisco Intl. Airport (SFO) and Ko Samui Airport isn't possible at present. However, you'll still be able to find a flight to Koh Samui with at least one stop.
Are SFO to Ko Samui Airport (USM) flight tickets cheaper when they're purchased at the last minute?
It is possible to find an awesome last-minute deal from SFO to Ko Samui Airport (USM), but it's also possible to miss out altogether! As many airlines publish prices up to a year in advance, it's worthwhile keeping an eye on fares early and being ready to book when you spot a good bargain. Expedia compares carrier prices and updates flight deals often, so you can feel confident knowing you're always getting the latest offers.

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