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Cheap flights from San Francisco to Ko Samui from $416

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 4/22. 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
0 bags

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Find the cheapest flights from San Francisco to Ko Samui

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
11:45 am - 6:50 pm
SFO
-
USM
41h 05m
1 stop
Multiple Airlines Logo
1:30 pm - 9:50 am
USM
-
SFO
34h 20m
1 stop
$854Multiple Airlines
Tue, Aug 18 - Tue, Aug 25
Multiple Airlines Logo
12:30 am - 7:10 am
SFO
-
USM
40h 40m
2 stops
Multiple Airlines Logo
8:10 am - 9:10 pm
USM
-
SFO
27h 00m
2 stops
$872Multiple Airlines
Sat, Aug 22 - Sat, Sep 12
Singapore Airlines Logo
11:45 am - 7:45 am
SFO
-
USM
30h 00m
1 stop
Singapore Airlines Logo
6:15 pm - 9:50 am
USM
-
SFO
29h 35m
1 stop
$919Singapore Airlines
Sun, Aug 23 - Sat, Sep 12
Japan Airlines Logo
12:25 pm - 8:35 am
SFO
-
USM
30h 10m
2 stops
Japan Airlines Logo
5:25 pm - 10:05 am
USM
-
SFO
30h 40m
2 stops
$926Japan Airlines
Sun, Sep 6 - Wed, Sep 9
Japan Airlines Logo
12:25 pm - 8:35 am
SFO
-
USM
30h 10m
2 stops
Japan Airlines Logo
9:00 pm - 11:55 am
USM
-
SFO
28h 55m
2 stops
$929Japan Airlines
Sun, Sep 6 - Wed, Sep 9
EVA Air Logo
12:50 am - 2:45 pm
SFO
-
USM
23h 55m
2 stops
EVA Air Logo
9:00 pm - 6:35 am
USM
-
SFO
23h 35m
2 stops
$946EVA Air
Tue, Apr 21 - Sun, Apr 26
Multiple Airlines Logo
1:05 am - 8:50 pm
SFO
-
USM
29h 45m
2 stops
Multiple Airlines Logo
7:50 am - 7:55 pm
USM
-
SFO
26h 05m
2 stops
$954Multiple Airlines
Sun, May 3 - Fri, May 15
Multiple Airlines Logo
1:05 am - 8:50 pm
SFO
-
USM
29h 45m
2 stops
Multiple Airlines Logo
7:50 am - 7:55 pm
USM
-
SFO
26h 05m
2 stops
$955Multiple Airlines
Sun, May 3 - Fri, May 15
EVA Air Logo
12:30 pm - 8:35 am
SFO
-
USM
30h 05m
2 stops
EVA Air Logo
11:45 am - 8:10 pm
USM
-
SFO
22h 25m
2 stops
$958EVA Air
Wed, Apr 29 - Wed, May 6
EVA Air Logo
12:50 am - 1:45 pm
SFO
-
USM
22h 55m
2 stops
EVA Air Logo
9:00 pm - 6:45 am
USM
-
SFO
23h 45m
2 stops
$984EVA Air
Sat, Apr 25 - Sun, May 10

Singapore Airlines flights from San Francisco to Ko Samui

Our best Singapore Airlines deals on San Francisco to Ko Samui flight tickets
Singapore Airlines
Aug 23
SFO11:45 amSan Francisco
30h 00m
1 stop
USM7:45 amKo Samui
Sep 12
USM6:15 pmKo Samui
29h 35m
1 stop
SFO9:50 amSan Francisco
$919
Singapore Airlines
Apr 26
SFO11:00 amSan Francisco
30h 45m
1 stop
USM7:45 amKo Samui
May 10
USM8:40 amKo Samui
38h 30m
1 stop
SFO9:10 amSan Francisco
$1,044
Singapore Airlines
Apr 26
SFO11:00 amSan Francisco
30h 45m
1 stop
USM7:45 amKo Samui
May 10
USM6:15 pmKo Samui
28h 55m
1 stop
SFO9:10 amSan Francisco
$1,045

EVA Air flights from San Francisco to Ko Samui

Our best EVA Air deals on San Francisco to Ko Samui flight tickets
EVA Air
Apr 21
SFO12:50 amSan Francisco
23h 55m
2 stops
USM2:45 pmKo Samui
Apr 26
USM9:00 pmKo Samui
23h 35m
2 stops
SFO6:35 amSan Francisco
$946
EVA Air
Apr 29
SFO12:30 pmSan Francisco
30h 05m
2 stops
USM8:35 amKo Samui
May 6
USM11:45 amKo Samui
22h 25m
2 stops
SFO8:10 pmSan Francisco
$958
EVA Air
Apr 25
SFO12:50 amSan Francisco
22h 55m
2 stops
USM1:45 pmKo Samui
May 10
USM9:00 pmKo Samui
23h 45m
2 stops
SFO6:45 amSan Francisco
$984

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 March 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 8/18

11:45 am-6:50 pm

1 stop41h 05m

Ko Samui

Tue 8/25

1:30 pm-9:50 am

1 stop34h 20m

$854

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Sat 8/22

12:30 am-7:10 am

2 stops40h 40m

Ko Samui

Sat 9/12

8:10 am-9:10 pm

2 stops27h 00m

$872

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Sun 8/23

11:45 am-7:45 am

1 stop30h 00m

Ko Samui

Sat 9/12

6:15 pm-9:50 am

1 stop29h 35m

$919

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Sun 9/6

12:25 pm-8:35 am

2 stops30h 10m

Ko Samui

Wed 9/9

5:25 pm-10:05 am

2 stops30h 40m

$926

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Sun 9/6

12:25 pm-8:35 am

2 stops30h 10m

Ko Samui

Wed 9/9

9:00 pm-11:55 am

2 stops28h 55m

$929

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Tue 4/21

12:50 am-2:45 pm

2 stops23h 55m

Ko Samui

Sun 4/26

9:00 pm-6:35 am

2 stops23h 35m

$946

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Sun 5/3

1:05 am-8:50 pm

2 stops29h 45m

Ko Samui

Fri 5/15

7:50 am-7:55 pm

2 stops26h 05m

$954

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Sun 5/3

1:05 am-8:50 pm

2 stops29h 45m

Ko Samui

Fri 5/15

7:50 am-7:55 pm

2 stops26h 05m

$955

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Wed 4/29

12:30 pm-8:35 am

2 stops30h 05m

Ko Samui

Wed 5/6

11:45 am-8:10 pm

2 stops22h 25m

$958
Quickest round-trip

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Sat 4/25

12:50 am-1:45 pm

2 stops22h 55m

Ko Samui

Sun 5/10

9:00 pm-6:45 am

2 stops23h 45m

$984

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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

What is the cheapest day to depart on your flight to Ko Samui?

Our data shows that Monday is the least expensive day to fly to Ko Samui. Tickets to fly out on this day can be as low as $382. Flights from San Francisco to Ko Samui on a Friday will generally be more expensive and average around $515. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Ko Samui?

Our data shows that the cheapest San Francisco to Ko Samui flights are usually those with departure times at noon. Our users have found flights to Ko Samui at noon for as low as $310. In the morning is when there is more demand to fly to Ko Samui, so prices are often more expensive at around $433 per ticket.

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

You could potentially save up to 63% 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

28h 40m

Direct flights

None
The fastest flight from San Francisco to Ko Samui takes 28h 40m
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

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

    San Francisco and Ko Samui are 8165.8 mi apart from one another. In terms of flight time, this usually takes a little over 28h 40m.

  • 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 $796Free CancellationRating
8.2
1,479 reviews
Search Singapore Airlines flights
EVA AirPriceFrom $1,001Free CancellationRating
8.4
1,374 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 Tao
Ko Pha Ngan
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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