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SFO - USM

$632 Find cheap flights from San Francisco to Koh Samui

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Francisco to Koh Samui departing on 10/31. 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
0 bags
Thu 7/11
Thu 7/18

Search hundreds of travel sites at once for deals on flights to Koh Samui

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Francisco to Koh 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 Koh Samui, as well as popular online travel agencies
In the last 7 days travelers have searched 44,212,782 times on KAYAK, and here is why:

Save 21% or moreCompare multiple travel sites with one search.

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Cheap flight deals from San Francisco to Koh 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 Koh 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 and deals for you by selecting your travel dates.
Choose your dates
9:40 am - 8:05 amSFO-USM
31h 25m1 stop
9:00 am - 7:50 amUSM-SFO
37h 50m1 stop
$961Singapore Airlines
Find Deal
Tue, Nov 5 - Sun, Nov 10
9:40 am - 8:05 amSFO-USM
31h 25m1 stop
9:00 am - 7:50 amUSM-SFO
37h 50m1 stop
$992Singapore Airlines
Find Deal
Tue, Nov 5 - Sun, Nov 10
11:30 pm - 3:35 pmSFO-USM
25h 05m2 stops
9:25 pm - 6:40 amUSM-SFO
24h 15m2 stops
$1,041EVA Air
Find Deal
Tue, Nov 5 - Sun, Nov 10
11:30 pm - 3:35 pmSFO-USM
25h 05m2 stops
9:25 pm - 6:40 amUSM-SFO
24h 15m2 stops
$1,042EVA Air
Find Deal
Tue, Nov 5 - Sun, Nov 10
11:50 pm - 4:10 pmSFO-USM
25h 20m2 stops
2:05 pm - 6:40 pmUSM-SFO
19h 35m2 stops
$1,091EVA Air
Find Deal
Sun, Nov 3 - Wed, Nov 6
9:40 am - 8:05 amSFO-USM
31h 25m1 stop
9:00 am - 6:35 pmUSM-SFO
24h 35m1 stop
$1,092Singapore Airlines
Find Deal
Sun, Nov 3 - Sat, Nov 9
12:05 am - 3:40 pmSFO-USM
24h 35m2 stops
2:05 pm - 6:50 pmUSM-SFO
19h 45m2 stops
$1,149
Find Deal
Mon, Nov 4 - Sun, Nov 10
12:05 am - 12:35 pmSFO-USM
21h 30m2 stops
1:55 pm - 6:50 pmUSM-SFO
19h 55m2 stops
$1,162
Find Deal
Mon, Nov 4 - Sun, Nov 10
1:45 am - 6:35 pmSFO-USM
26h 50m1 stop
10:55 am - 5:45 pmUSM-SFO
20h 50m1 stop
$2,179Cathay Pacific
Find Deal
Sat, Jul 13 - Thu, Jul 25
12:55 am - 6:35 pmSFO-USM
27h 40m1 stop
10:55 am - 12:00 pmUSM-SFO
39h 05m1 stop
$2,240Cathay Pacific
Find Deal
Thu, Jul 25 - Sat, Aug 3

Flights from San Francisco to Koh Samui - Travel Insights & Trends

Get data-powered insights and trends into flights from San Francisco to Koh 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 Koh Samui?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
The cheapest return flight ticket from San Francisco to Koh Samui found by KAYAK users in the last 72 hours was for $961 on Singapore Airlines, followed by EVA Air ($1,041). One-way flight deals have also been found from as low as $632 on EVA Air and from $687 on Singapore Airlines.

Good to know

Low season

September

High season

January

Cheapest flight

$632
Best time to beat the crowds with an average 27% drop in price.
Most popular time to fly and prices are also 13% lower on average.
Flight from San Francisco to Koh Samui

When to book flights from San Francisco to Koh Samui

Are your dates flexible? Find out the best times to travel from San Francisco to Koh 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 Koh Samui

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

    In the last 3 days, the lowest price for a flight from San Francisco to Koh Samui was $632 for a one-way ticket and $961 for a round-trip.

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

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

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

    On your way to Koh 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 Koh Samui?

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

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

    Star Alliance, and oneworld are the airline alliances operating flights between San Francisco and Koh Samui, with Star Alliance being the most commonly used for this route.

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

    The two airlines most popular with KAYAK users for flights from San Francisco to Koh Samui are EVA Air and Singapore Airlines. With an average price for the route of $1,252 and an overall rating of 8.3, EVA Air is the most popular choice. Singapore Airlines is also a great choice for the route, with an average price of $1,608 and an overall rating of 8.2.

  • How does KAYAK find such low prices on flights from San Francisco to Koh 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 Koh Samui.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Koh 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 Koh 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 Koh 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 Koh 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 Koh Samui from San Francisco up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top 3 airlines serving from San Francisco to Koh Samui

 
See real verified KAYAK customer reviews for airlines flying from San Francisco to Koh 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 Koh 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.
8.3
EVA AirOverall score based on 1488 reviews
8.0Food
8.6Crew
8.2Comfort
8.0Entertainment
8.4Boarding
Airline reviews

The crew was very helpful. Food was prepared with great care and tasted wonderful. Movie selection was a bit limited. The bedding on the seat is a little too thin for sleeping.

10.0 ExcellentBinhui, Jun 2024IAH - TPE
Read more about EVA Air reviews

The crew was very helpful. Food was prepared with great care and tasted wonderful. Movie selection was a bit limited. The bedding on the seat is a little too thin for sleeping.

Their announcement was not quite clear in Chinese. The rest is pretty good.

The hygiene of the bathrooms were terrible. Urine smells leaked out into the cabin and the seats were really tight, even for a petite woman like myself. Flight attendants did not go through the cabin enough to offer refreshments.

Fast and efficient boarding. Flight was on time. Service was very good for our long flight. First time flying with this airline and I would highly recommend.

Eva Air's Business Class is pretty decent. With the given price, I think that the food can be better.

Pleasant, comfortable, and entertaining. All told, ZERO issues with it. And sadly, so far the flight was WAY more comfortable than the hellhole that is "Lambug Beach Resort" at Badian Beach!

It was a pleasant fly with Eva Air from NYC to Taipei. The crew were friendly and the food was exceeded my expectation.

Eva air is a good airline. The seats on the way to Taipei could have certainly been more comfortable, but all in all it was a pretty good experience.

Boarding is fast and easy for economy class, food was ok baggage policies are good

Overall the flight was what might be expected for a long haul flight to Asia in economy class. The cabin crew was attentive and the food was good. Boarding was fairly fast and easy. The one thing I found frustrating was the EVA app. It is terrible. Trying to do anything on it was almost impossible.

American Airlines didn’t allow you to complete online check-in unless you paid for your seats. Quite disappointing.

Overall mediocre-good, with the service on the flight operated by American Airlines being subpar and not the kind and standard you’d get from a Japan Airlines crew. The majority of the stewards on AA were not as gentle and friendly as those from Japan Airlines. Japan Airlines were more attentive to detail and your flight experience. AA was more interested in completing their tasks.

All of the JAL flights in this itinerary were great. However the last leg of my flight from LAX to SFO was through Japan Air’s partner, AA which wqsn’t up to par. We were informed only minutes before boarding time of a delay despite the airlines knowing about the delay far earlier (the aircraft we would be taking arriving arrived and disembarked close to our boarding time, for all to see but AA still kept the original boarding time posted until last minute). Furthermore, once we boarded the taxi/wait time was also extended, with the pilot blaming “construction at SFO” for the delay, rather than taking accountability for the the plane’s late arrival coming into LAX. We took off approximately an hour later than scheduled. It’s for these reasons I adamantly avoid American Airlines when possible. Again, JAL was stellar.

Food as always. PA was not clear, especially the English ones. Very limited Hollywood movies. Unlike the first flight I had, this plane has less leg room and less room for my under seat baggage.

I like the braised beef., miso soup,, and green tea. Very little choices of hollywood movies. The PA announcement in English was not very clear and very soft. I could hardly hear.

Please change menu every now & then bc I fly twice within the year and serving the food the same

More updated movies & Chinese movies. The food sometimes overcooked. Prefer to have more neat snacks in between than just choose from the menu. Please change the menu every now and then. This is my second time flying within one year and the menu didn’t change at all!

Food is lagging. Very poor choice. Like vending machine fast food.

Please change the menu more often. The beef is not tender, more choice in ice cream flavor. Dessert is not good too.

Again I paid for an upgrade on my credit card didn’t get it need a refund. . American I not good at gettin in contact for refunds.

Leg room and flight sound insulation is very bad. They broke 3 of my bags with bad handling

Crews were great but food not much selection just all tailored for Asian passengers.

I had a great experience with Singapore airlines as always. The partner airline, Scoot was fine except my bag was misplaced during the shuffle. Ultimately, my baggage arrived intact. Attempting to inquire about my baggage was impossible.

The Premium economy class is not the same as some other airlines because there are no economy seats on these planes. Basically you’re getting an economy seat that’s a little wider. The seats are not that much more comfortable. The service and food experience is similar to economy class on other Asian airlines. There aren’t enough toilets for the entire plane therefore we are forced to share the business class toilets that are closed off with curtains.

Good flight. Fiod was ready a bit late hence a hurry to finish before landing. Excellent crew and service

I commend the flight attendants on our SFO-SIN flight who went above and beyond to provide us with extra snacks and food. This type of service makes the flight experience personal and awesome.

It was a great flight Food was great Crew was spectacular

In general good, but the machine seems to be long in operation and some functions were restricted as e. g. Adjusting of seats.

People were so nice! Economy seats were small and cramped feeling for me. I’m slender and 6 feet tall

The singapore airline now compared before covid, I like the service before covid. SQ was the best of all airlines but now I am going to look for different airline if I am travelling in asia.

Book cheap flights from San Francisco to Koh Samui

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from San Francisco to Koh Samui found on KAYAK in the last 72 hours.
10/31Thu
2 stopsEVA Air
24h 45mSFO-USM
$632
8/4Sun
2 stops
23h 55mSFO-USM
$640
8/5Mon
2 stopsEVA Air
29h 35mSFO-USM
$651
11/1Fri
1 stopSingapore Airlines
31h 25mSFO-USM
$687
11/2Sat
1 stopSingapore Airlines
31h 25mSFO-USM
$747
8/1Thu
2 stopsEVA Air
29h 15mSFO-USM
$806
8/5Mon
1 stopSingapore Airlines
40h 50mSFO-USM
$883
8/4Sun
1 stopCathay Pacific
27h 40mSFO-USM
$1,156
9/30Mon
2 stopsCathay Pacific
30h 45mSFO-USM
$3,120
7/8Mon
2 stopsEmirates
33h 50mSFO-USM
$4,149

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San Francisco - Koh Samui Flights

Departure:

San Francisco (SFO)United States

Destination:

Koh Samui (USM)Thailand

Cabin classes:

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