SFO - USM

$838 Find Cheap Flights from San Francisco to Ko Samui

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Francisco to Ko Samui departing on 9/7. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Ko Samui

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Francisco to Ko Samui, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Francisco to Ko Samui, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$838
Singapore Airlines
Mon 9/7Mon 9/14
SFO - USM • 1 stop
Cheapest one-way
$847
Multiple Airlines
Sat 5/23
SFO - USM • 2 stops
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
Delta offers free Wi-Fi for SkyMiles members onboard.
Sun Country's Best seats have 34 inches of legroom.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Cheapest • from $838 (round-trip)
Best reviews • 8.5 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between San Francisco and Ko Samui. You'll need at least 1 connection.
Insights
Insights
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Insights
Avoid delays
Most punctual • 91% on-time
Best time • Fewest delays
Insights
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Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Ko Samui!
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Flight Deals

Cheap Flights from San Francisco to Ko Samui (SFO-USM)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Francisco to Ko Samui that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from San Francisco to Ko Samui

Mon, Sep 7 - Mon, Sep 14
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
$838Singapore Airlines
Sun, Oct 4 - Sun, Oct 18
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
$862Singapore 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
6:15 pm - 9:50 am
USM
-
SFO
29h 35m
1 stop
$872Singapore Airlines
Sun, Sep 6 - Sun, Sep 20
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
$886Singapore Airlines
Thu, Sep 10 - Mon, Sep 21
Singapore Airlines Logo
11:45 am - 5:20 pm
SFO
-
USM
39h 35m
1 stop
Singapore Airlines Logo
6:15 pm - 9:50 am
USM
-
SFO
29h 35m
1 stop
$914Singapore Airlines
Sat, Sep 5 - 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
$991Singapore Airlines
Mon, Oct 5 - Tue, Oct 20
Singapore Airlines Logo
11:45 am - 6:50 pm
SFO
-
USM
41h 05m
1 stop
Singapore Airlines Logo
7:45 pm - 9:50 am
USM
-
SFO
28h 05m
1 stop
$1,083Singapore Airlines
Thu, Sep 3 - Wed, Sep 9
Japan Airlines Logo
12:25 pm - 8:35 am
SFO
-
USM
30h 10m
2 stops
Japan Airlines Logo
7:50 am - 10:05 am
USM
-
SFO
40h 15m
2 stops
$1,095Japan Airlines
Sun, Sep 6 - Sun, Sep 20
Japan Airlines Logo
12:25 pm - 8:35 am
SFO
-
USM
30h 10m
2 stops
Japan Airlines Logo
6:25 pm - 10:05 am
USM
-
SFO
29h 40m
2 stops
$1,100Japan Airlines
Mon, Sep 7 - Mon, Sep 14
Japan Airlines Logo
12:25 pm - 8:35 am
SFO
-
USM
30h 10m
2 stops
Japan Airlines Logo
6:00 am - 10:05 am
USM
-
SFO
42h 05m
2 stops
$1,104Japan Airlines
Booking Insights

KAYAK's insights & trends for San Francisco to Ko Samui flights

Get data-powered insights and trends into flights from San Francisco to Ko Samui to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from San Francisco to Ko Samui?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from San Francisco to Ko Samui were found on Singapore Airlines ($838) and Japan Airlines ($1,095).

Expert advice

Expert advice for your flight from San Francisco to Ko Samui

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Daniel Scheffler

Daniel Scheffler

Expert on Sun Country Air

Daniel Scheffler is a travel writer, podcaster, and producer. Born in Africa, bred in Europe and now living in America he has traveled to 140 countries (and all 50 U.S. states). Plus he has stayed at over 2500 hotels across the globe. His original shows Everywhere and Without Maps (available on Spotify) showcase his beliefs, travel is about humanity and sharing that beauty. And thus it reminds you that you shouldn’t believe everything you think.

Stefanie Waldek

Stefanie Waldek

Expert on Delta

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Good to know

Cheapest flight$838
Flight from San Francisco to Ko Samui

When to book flights from San Francisco to Ko Samui

Are your dates flexible? Find out the best times to travel from San Francisco to Ko Samui based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from San Francisco to Ko Samui

  • What is the cheapest flight from San Francisco to Ko Samui?

    In the last 3 days, the lowest price for a flight from San Francisco to Ko Samui was $847 for a one-way ticket and $838 for a round-trip.

  • Do I need a passport to fly between San Francisco and Ko Samui?

    A passport is required to fly from San Francisco to Ko Samui.

  • Which airports will I be using when flying from San Francisco to Ko Samui?

    On your way to Ko Samui, you’ll fly out from San Francisco. You’ll be landing at Ko Samui.

  • Which aircraft models fly most regularly from San Francisco to Ko Samui?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from San Francisco to Ko Samui?

    Star Alliance is the only airline alliance operating flights between San Francisco and Ko Samui.

  • Which is the best airline for flights from San Francisco to Ko Samui, EVA Air or Singapore Airlines?

    The two airlines most popular with KAYAK users for flights from San Francisco to Ko Samui are EVA Air and Singapore Airlines. With an average price for the route of $1,102 and an overall rating of 8.5, EVA Air is the most popular choice. Singapore Airlines is also a great choice for the route, with an average price of $1,075 and an overall rating of 8.2.

  • How does KAYAK find such low prices on flights from San Francisco to Ko Samui?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from San Francisco to Ko Samui.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from San Francisco to Ko Samui?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ko Samui from San Francisco is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from San Francisco to Ko Samui?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ko Samui with an airline and back to San Francisco with another airline. Booking your flights between San Francisco and USM can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from San Francisco to Ko Samui?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ko Samui from San Francisco up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from San Francisco to Ko Samui

 
See real verified KAYAK customer reviews for airlines flying from San Francisco to Ko Samui. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from San Francisco to Ko Samui? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.5
EVA AirOverall score based on 1445 reviews
8.3Comfort
8.1Food
8.4Boarding
8.0Entertainment
8.6Crew
Airline reviews

Food tasted like the meat had freezer burn. Another thing all of our 4 check baggage was left somewhere and my oral medication for my diabetes was left in one of the lost luggage..most of the flight attendants did not know how to communicate in English.. the trip was a total nightmare

2.0 MediocreJoselito, May 2026
IAH - TPE
Read more EVA Air reviews

Food tasted like the meat had freezer burn. Another thing all of our 4 check baggage was left somewhere and my oral medication for my diabetes was left in one of the lost luggage..most of the flight attendants did not know how to communicate in English.. the trip was a total nightmare

I put the review all together for the first review

The crew need to be more friendly it seem everything such a rush situation during dinner and breakfast. Smiles to the passenger go such a long way just the service from Seattle to Taipei, service from Taipei to Bangkok were great more pleasant the flight attendant from Thailand she was very nice, as far as entertainment were amazing , wiffi connection was incredible great, I will be able to charged my phone from Seattle to Taipei and from taipei to Bangkok I won’t be able to do so flight attendant told me that because I don’t have the original iPhone charger connection has nothing to do what type of charger I have so she said there is nothing she can do about it. Foods : from Seattle to Taipei were ok no flavor , from Taipei to Bangkok I have chicken teriyaki the rice is overcooked all the flavor stuck on the aluminum wraps , breakfast the congee was on point and delicious. Will I recommend anyone to fly with Eva air go for it so you can experience yourself for myself I won’t fly with them again I’m gonna stick with Singapore airlines instead.

I liked that they gave us a couple of meals and drinks but the meal was not good and not many options especially if we are seated in the back of the plane.

Never went. Got rescheduled with Phillipine Airlines to Bali, which was fine.

I am really satisfied with Eva Air and will definitely fly with them again.

Again on this leg the WiFi wouldn't work. The seats were comfortable with adequate cushion and space between seats for my legs. Very nice 3-hour flight.

The flight from SEA to Taipei was on a Boeing 787-10. Economy seats were unacceptably cramped and the seats themselves were old and lacking cushion. I'm only 5'3" and couldn't cross my legs as my knees were up against the seat in front of me! I could not get WiFi to work most of the time on both flights and crew were invisible except to serve meals. The onboard entertainment also did not work reliably and was very hard to hear through the provided earbuds. The Asian vegetarian meals were interesting. I hope they can provide a fully vegan option though these meals seemed to be already. I appreciate their providing these meals options for vegans. I don't think I'll fly a 787-10 if I can help it. It was the definition of a sardine can in Economy.

My luggage was lost and didnt arrive in manila yesterday. And until now im still waiting for the confirmation if my luggage is teady for pick up in terminal 1

I always preferred EVA air every time I visit Philippines. It’s just this time that I have to be very early to make sure that I don’t miss my flight due to TSA problem. There’s only one choice of food serve which you use to have 2 on our flight from Taiwan to Philippines . Otherwise I will still use EVA air in my future flight.

Clean modern comfortable. Food could have been better, I only ate breakfast I wish they wouldn’t wake sleeping passengers who would rather sleep through dinner. No tea or coffee for breakfast

Food was terrible , uncomfortable seats, WiFi did not work, will never fly Singapore again.

I had ordered vegetarian food. What I was presented was extremely dissatisfying and not up to the mark. I pretty much did not eat entire 19 hours. For.an airline voted as best in business, it was extremely disappointing. Seats were not comfortable to sleep. Entertainment system didn’t have much choice. WiFi didn’t work for more than half the time. Cabin crew were also difficult to understand. A bit of diversity like Emirates crew would go a long way.

A little more room from the reclining seat in the front of me.

They ran out of the second choice of food was stuck with fish

No frills airline with minimal leg room and no entertainment

I wish there was a little more leg room between the seats. The recline was good and seats overall were comfortable. I also didn’t like the 2-4-2 configuration.

toilets could be cleaned more frequently, everything else was pretty good.

The flight crew was phenominal! We couldn't have asked for any better. They were experienced professionals.

The crew was very courteous and professional. the flight is relatively clean and comfortable.

Everything you need to know for your flight from San Francisco to Ko Samui

Information on your arrival and departure airports