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Cheap flights from San Francisco to Ko Samui from $704

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Francisco to Ko Samui departing on 7/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from San Francisco to Ko Samui

Cheap round-trip flights

Enter your travel dates to find the best prices.
Singapore Airlines Logo
11:45 am - 6:50 pm
SFO
-
USM
41h 05m
1 stop
Singapore Airlines Logo
11:05 am - 9:50 am
USM
-
SFO
36h 45m
1 stop
$815Singapore Airlines
Tue, Sep 15 - Tue, Sep 22
Singapore Airlines Logo
11:45 am - 7:45 am
SFO
-
USM
30h 00m
1 stop
Singapore Airlines Logo
11:05 am - 9:50 am
USM
-
SFO
36h 45m
1 stop
$835Singapore Airlines
Mon, Sep 7 - Mon, Sep 14
Singapore Airlines Logo
11:45 am - 7:45 am
SFO
-
USM
30h 00m
1 stop
Singapore Airlines Logo
11:05 am - 9:50 am
USM
-
SFO
36h 45m
1 stop
$837Singapore Airlines
Tue, Sep 1 - Tue, Sep 15
Singapore Airlines Logo
11:45 am - 7:45 am
SFO
-
USM
30h 00m
1 stop
Singapore Airlines Logo
8:40 am - 9:50 am
USM
-
SFO
39h 10m
1 stop
$838Singapore Airlines
Mon, Sep 7 - Mon, Sep 14
Singapore Airlines Logo
11:45 am - 7:45 am
SFO
-
USM
30h 00m
1 stop
Singapore Airlines Logo
11:05 am - 9:50 am
USM
-
SFO
36h 45m
1 stop
$862Singapore Airlines
Mon, Sep 7 - Sun, Sep 13
Singapore Airlines Logo
11:45 am - 6:50 pm
SFO
-
USM
41h 05m
1 stop
Singapore Airlines Logo
8:40 am - 9:50 am
USM
-
SFO
39h 10m
1 stop
$884Singapore Airlines
Fri, Oct 9 - Sun, Oct 18
Singapore Airlines Logo
9:40 am - 8:00 am
SFO
-
USM
31h 20m
1 stop
Singapore Airlines Logo
7:45 pm - 7:50 am
USM
-
SFO
27h 05m
1 stop
$893Singapore Airlines
Thu, Nov 26 - Mon, Nov 30
Singapore Airlines Logo
9:40 am - 8:00 am
SFO
-
USM
31h 20m
1 stop
Singapore Airlines Logo
12:00 pm - 7:50 am
USM
-
SFO
34h 50m
1 stop
$918Singapore Airlines
Sun, Nov 22 - Mon, Nov 30
Singapore Airlines Logo
9:40 am - 8:00 am
SFO
-
USM
31h 20m
1 stop
Singapore Airlines Logo
12:00 pm - 7:50 am
USM
-
SFO
34h 50m
1 stop
$921Singapore Airlines
Sun, Nov 22 - Mon, Nov 30
Singapore Airlines Logo
9:40 am - 8:00 am
SFO
-
USM
31h 20m
1 stop
Singapore Airlines Logo
12:00 pm - 7:50 am
USM
-
SFO
34h 50m
1 stop
$924Singapore Airlines
Sun, Nov 22 - Mon, Nov 30

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Singapore Airlines flights from San Francisco to Ko Samui

Our best Singapore Airlines deals on San Francisco to Ko Samui flight tickets
Singapore Airlines
Sep 15
SFO11:45 amSan Francisco
41h 05m
1 stop
USM6:50 pmKo Samui
Sep 22
USM11:05 amKo Samui
36h 45m
1 stop
SFO9:50 amSan Francisco
$815
Singapore Airlines
Sep 7
SFO11:45 amSan Francisco
30h 00m
1 stop
USM7:45 amKo Samui
Sep 14
USM11:05 amKo Samui
36h 45m
1 stop
SFO9:50 amSan Francisco
$835
Singapore Airlines
Sep 1
SFO11:45 amSan Francisco
30h 00m
1 stop
USM7:45 amKo Samui
Sep 15
USM11:05 amKo Samui
36h 45m
1 stop
SFO9:50 amSan Francisco
$837

Cathay Pacific flights from San Francisco to Ko Samui

Our best Cathay Pacific deals on San Francisco to Ko Samui flight tickets
Cathay Pacific
Jun 26
SFO2:00 pmSan Francisco
39h 40m
1 stop
USM7:40 pmKo Samui
Jul 11
USM11:55 amKo Samui
25h 20m
1 stop
SFO11:15 pmSan Francisco
$2,690
Cathay Pacific
Jun 26
SFO2:00 pmSan Francisco
39h 40m
1 stop
USM7:40 pmKo Samui
Jul 11
USM11:55 amKo Samui
25h 20m
1 stop
SFO11:15 pmSan Francisco
$2,981
Cathay Pacific
Jun 25
SFO2:00 pmSan Francisco
39h 40m
1 stop
USM7:40 pmKo Samui
Jul 8
USM11:55 amKo Samui
25h 20m
1 stop
SFO11:15 pmSan Francisco
$3,287

momondo Fare Finder

 
Customize your flight search to find flights from San Francisco to Ko Samui that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated June 16, 2026.
Use the filters below to find and compare flights from San Francisco to Ko Samui that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Tue 9/15

11:45 am-6:50 pm

1 stop41h 05m

Ko Samui

Tue 9/22

11:05 am-9:50 am

1 stop36h 45m

$815

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Mon 9/7

11:45 am-7:45 am

1 stop30h 00m

Ko Samui

Mon 9/14

11:05 am-9:50 am

1 stop36h 45m

$835

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Tue 9/1

11:45 am-7:45 am

1 stop30h 00m

Ko Samui

Tue 9/15

11:05 am-9:50 am

1 stop36h 45m

$837

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Mon 9/7

11:45 am-7:45 am

1 stop30h 00m

Ko Samui

Mon 9/14

8:40 am-9:50 am

1 stop39h 10m

$838

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Mon 9/7

11:45 am-7:45 am

1 stop30h 00m

Ko Samui

Sun 9/13

11:05 am-9:50 am

1 stop36h 45m

$862

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Fri 10/9

11:45 am-6:50 pm

1 stop41h 05m

Ko Samui

Sun 10/18

8:40 am-9:50 am

1 stop39h 10m

$884
Quickest round-trip

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Thu 11/26

9:40 am-8:00 am

1 stop31h 20m

Ko Samui

Mon 11/30

7:45 pm-7:50 am

1 stop27h 05m

$893

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Sun 11/22

9:40 am-8:00 am

1 stop31h 20m

Ko Samui

Mon 11/30

12:00 pm-7:50 am

1 stop34h 50m

$918

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Sun 11/22

9:40 am-8:00 am

1 stop31h 20m

Ko Samui

Mon 11/30

12:00 pm-7:50 am

1 stop34h 50m

$921

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Sun 11/22

9:40 am-8:00 am

1 stop31h 20m

Ko Samui

Mon 11/30

12:00 pm-7:50 am

1 stop34h 50m

$924

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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See travel insights to Ko Samui from

How to get the cheapest flight ticket from San Francisco to Ko Samui

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Can stopping save me money on San Francisco to Ko Samui flights?

You could potentially save up to 74% on your flight if you consider stops on a San Francisco to Ko Samui flight.

When to book flights from San Francisco to Ko Samui

Are you open to changing your travel dates? Check out the ideal times to fly from San Francisco to Ko Samui according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap San Francisco to Ko Samui (SFO to USM) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Francisco to Ko Samui

Fastest flight time

20h 00m

Direct flights

None
The fastest flight from San Francisco to Ko Samui takes 20h 00m
There are no direct flights from San Francisco to Ko Samui. There are no popular flight routes from San Francisco to Ko Samui.
Search flight deals

Frequently asked questions about flying from San Francisco to Ko Samui

  • How far is San Francisco to Ko Samui by plane?

    San Francisco and Ko Samui are 8166.7 mi apart from one another. In terms of flight time, this usually takes a little over 20h 00m.

  • When did momondo last update prices for flights from San Francisco Airport to Ko Samui Airport?

    Prices for flights from San Francisco Airport to Ko Samui Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from San Francisco Airport to Ko Samui Airport?

  • How old do you have to be to fly from San Francisco Airport to Ko Samui Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from San Francisco Airport to Ko Samui Airport.

  • What documentation or ID do you need to fly to Ko Samui Airport?

    The travel and health documents required for your trip to Ko Samui Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ko Samui Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from San Francisco to Ko Samui?

Best airlines flying from San Francisco to Ko Samui

Compare and see reviews for airlines that fly from San Francisco to Ko Samui with momondo
Airline
Rating
Free Cancellation
Price
Singapore AirlinesPriceFrom $779Free CancellationRating
8.2
1,545 reviews
Search Singapore Airlines flights
EVA AirPriceFrom $940Free CancellationRating
8.5
1,474 reviews
Search EVA Air flights

Traveling to a place near Ko Samui?

Book flights to Ko Samui if you plan to visit one of these locations
Ko Pha Ngan
Ko Tao
Khanom

Why use momondo?

Why should I use momondo to find a flight deal from San Francisco to Ko Samui?

It is quick and easy to find San Francisco to Ko Samui flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Ko Samui that suits you.

Can I find flights from San Francisco to Ko Samui with flexible booking policies on momondo?

Flights from San Francisco to Ko Samui with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from San Francisco to Ko Samui?

momondo provides multiple filters to help you find the best flight to Ko Samui from San Francisco. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from San Francisco to Ko Samui right now. Can momondo alert me if prices change?

Yes. momondo can track prices for San Francisco to Ko Samui flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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