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Cheap flights from San Francisco to Ko Samui from $809

This is the cheapest round-trip 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 4/26. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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.
Singapore Airlines Logo
11:00 am - 6:50 pm
SFO
-
USM
41h 50m
1 stop
Singapore Airlines Logo
8:40 am - 9:10 am
USM
-
SFO
38h 30m
1 stop
$809Singapore Airlines
Sun, Apr 26 - Sun, May 10
Singapore Airlines Logo
11:00 am - 7:45 am
SFO
-
USM
30h 45m
1 stop
Singapore Airlines Logo
6:15 pm - 9:10 am
USM
-
SFO
28h 55m
1 stop
$859Singapore Airlines
Mon, Apr 27 - Thu, May 7
Multiple Airlines Logo
12:50 am - 8:50 pm
SFO
-
USM
30h 00m
2 stops
Multiple Airlines Logo
2:35 pm - 8:30 pm
USM
-
SFO
19h 55m
2 stops
$876Multiple Airlines
Sat, Apr 11 - Thu, Apr 30
Multiple Airlines Logo
12:50 am - 8:30 pm
SFO
-
USM
29h 40m
2 stops
Multiple Airlines Logo
9:15 am - 8:30 pm
USM
-
SFO
25h 15m
2 stops
$877Multiple Airlines
Sat, May 2 - Sun, May 31
Singapore Airlines Logo
11:00 am - 5:20 pm
SFO
-
USM
40h 20m
1 stop
Singapore Airlines Logo
11:05 am - 9:10 am
USM
-
SFO
36h 05m
1 stop
$936Singapore Airlines
Sun, Apr 12 - Thu, Apr 30
Singapore Airlines Logo
11:00 am - 7:45 am
SFO
-
USM
30h 45m
1 stop
Singapore Airlines Logo
11:05 am - 9:10 am
USM
-
SFO
36h 05m
1 stop
$937Singapore Airlines
Sun, Apr 12 - Thu, Apr 30
Multiple Airlines Logo
12:50 am - 2:45 pm
SFO
-
USM
23h 55m
2 stops
Multiple Airlines Logo
2:35 pm - 8:30 pm
USM
-
SFO
19h 55m
2 stops
$941Multiple Airlines
Sat, Apr 25 - Wed, May 6
EVA Air Logo
12:50 am - 1:45 pm
SFO
-
USM
22h 55m
2 stops
EVA Air Logo
3:50 pm - 6:45 am
USM
-
SFO
28h 55m
2 stops
$975EVA Air
Sat, May 9 - Sun, May 31
EVA Air Logo
12:00 pm - 7:45 am
SFO
-
USM
29h 45m
2 stops
EVA Air Logo
2:00 pm - 8:00 pm
USM
-
SFO
20h 00m
2 stops
$978EVA Air
Thu, Mar 26 - Thu, Apr 2
EVA Air Logo
12:00 pm - 7:45 am
SFO
-
USM
29h 45m
2 stops
EVA Air Logo
2:00 pm - 8:00 pm
USM
-
SFO
20h 00m
2 stops
$979EVA Air
Thu, Mar 26 - Thu, Apr 2

EVA Air flights from San Francisco to Ko Samui

Our best EVA Air deals on San Francisco to Ko Samui flight tickets
EVA Air
May 9
SFO12:50 amSan Francisco
22h 55m
2 stops
USM1:45 pmKo Samui
May 31
USM3:50 pmKo Samui
28h 55m
2 stops
SFO6:45 amSan Francisco
$975
EVA Air
Mar 26
SFO12:00 pmSan Francisco
29h 45m
2 stops
USM7:45 amKo Samui
Apr 2
USM2:00 pmKo Samui
20h 00m
2 stops
SFO8:00 pmSan Francisco
$978
EVA Air
Mar 26
SFO12:00 pmSan Francisco
29h 45m
2 stops
USM7:45 amKo Samui
Apr 2
USM2:00 pmKo Samui
20h 00m
2 stops
SFO8:00 pmSan Francisco
$979

Singapore Airlines flights from San Francisco to Ko Samui

Our best Singapore Airlines deals on San Francisco to Ko Samui flight tickets
Singapore Airlines
Apr 26
SFO11:00 amSan Francisco
41h 50m
1 stop
USM6:50 pmKo Samui
May 10
USM8:40 amKo Samui
38h 30m
1 stop
SFO9:10 amSan Francisco
$809
Singapore Airlines
Apr 27
SFO11:00 amSan Francisco
30h 45m
1 stop
USM7:45 amKo Samui
May 7
USM6:15 pmKo Samui
28h 55m
1 stop
SFO9:10 amSan Francisco
$859
Singapore Airlines
Apr 12
SFO11:00 amSan Francisco
40h 20m
1 stop
USM5:20 pmKo Samui
Apr 30
USM11:05 amKo Samui
36h 05m
1 stop
SFO9:10 amSan Francisco
$936

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 January 29, 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

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Sun 4/26

11:00 am-6:50 pm

1 stop41h 50m

Ko Samui

Sun 5/10

8:40 am-9:10 am

1 stop38h 30m

$809

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Mon 4/27

11:00 am-7:45 am

1 stop30h 45m

Ko Samui

Thu 5/7

6:15 pm-9:10 am

1 stop28h 55m

$859

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Sat 4/11

12:50 am-8:50 pm

2 stops30h 00m

Ko Samui

Thu 4/30

2:35 pm-8:30 pm

2 stops19h 55m

$876

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Sat 5/2

12:50 am-8:30 pm

2 stops29h 40m

Ko Samui

Sun 5/31

9:15 am-8:30 pm

2 stops25h 15m

$877

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Sun 4/12

11:00 am-5:20 pm

1 stop40h 20m

Ko Samui

Thu 4/30

11:05 am-9:10 am

1 stop36h 05m

$936

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Sun 4/12

11:00 am-7:45 am

1 stop30h 45m

Ko Samui

Thu 4/30

11:05 am-9:10 am

1 stop36h 05m

$937

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Sat 4/25

12:50 am-2:45 pm

2 stops23h 55m

Ko Samui

Wed 5/6

2:35 pm-8:30 pm

2 stops19h 55m

$941

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Sat 5/9

12:50 am-1:45 pm

2 stops22h 55m

Ko Samui

Sun 5/31

3:50 pm-6:45 am

2 stops28h 55m

$975

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Thu 3/26

12:00 pm-7:45 am

2 stops29h 45m

Ko Samui

Thu 4/2

2:00 pm-8:00 pm

2 stops20h 00m

$978

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Thu 3/26

12:00 pm-7:45 am

2 stops29h 45m

Ko Samui

Thu 4/2

2:00 pm-8:00 pm

2 stops20h 00m

$979

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 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

What is the typical price of a round-trip flight between San Francisco and Ko Samui?

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 26% 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 45m

Direct flights

None
The fastest flight from San Francisco to Ko Samui takes 28h 45m
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 45m.

  • 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
1,440 reviews
Search Singapore Airlines flights
EVA AirPriceFrom $1,001Free CancellationRating
8.4
1,334 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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