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Find cheap flights from San Francisco to Koh Samui from $689

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 7/29. 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
Sun 6/2
Sun 6/9

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 43,693,958 times on KAYAK, and here is why:

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

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
6:35 pm - 8:55 pmSFO-USM
36h 20m2 stops
7:15 pm - 11:20 amUSM-SFO
30h 05m2 stops
$1,442Turkish Airlines
Find Deal
Fri, May 17 - Mon, May 20
1:05 am - 9:00 pmSFO-USM
29h 55m2 stops
8:00 am - 8:50 pmUSM-SFO
26h 50m2 stops
$1,443
Find Deal
Sun, May 19 - Wed, May 29
6:35 pm - 1:45 pmSFO-USM
29h 10m2 stops
7:30 pm - 11:20 amUSM-SFO
29h 50m2 stops
$1,444
Find Deal
Thu, Aug 1 - Thu, Aug 8
1:25 am - 2:45 pmSFO-USM
23h 20m2 stops
9:15 pm - 7:00 amUSM-SFO
23h 45m2 stops
$1,485EVA Air
Find Deal
Sun, Jul 7 - Tue, Jul 16
1:25 am - 4:35 pmSFO-USM
25h 10m2 stops
7:10 pm - 7:00 amUSM-SFO
25h 50m2 stops
$1,489EVA Air
Find Deal
Mon, Jul 8 - Wed, Jul 17
11:30 am - 8:05 amSFO-USM
30h 35m1 stop
9:00 am - 8:15 pmUSM-SFO
25h 15m1 stop
$1,530Singapore Airlines
Find Deal
Tue, Jul 9 - Wed, Jul 17
11:30 am - 8:05 amSFO-USM
30h 35m1 stop
9:00 am - 8:15 pmUSM-SFO
25h 15m1 stop
$1,584Singapore Airlines
Find Deal
Sun, Jul 7 - Wed, Jul 17
12:15 am - 5:05 pmSFO-USM
26h 50m2 stops
10:55 am - 10:20 pmUSM-SFO
25h 25m1 stop
$1,726Cathay Pacific
Find Deal
Thu, May 16 - Mon, May 20
1:15 am - 6:35 pmSFO-USM
27h 20m1 stop
10:55 am - 10:20 pmUSM-SFO
25h 25m1 stop
$1,892Cathay Pacific
Find Deal
Thu, May 16 - Mon, May 20
4:10 pm - 10:30 amSFO-USM
28h 20m2 stops
5:55 pm - 1:50 pmUSM-SFO
33h 55m2 stops
$2,131Qatar Airways
Find Deal
Fri, Jul 12 - Tue, Jul 16

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 $1,442 on Turkish Airlines, followed by EVA Air ($1,485). One-way flight deals have also been found from as low as $689 on Singapore Airlines and from $744 on EVA Air.

Good to know

Low season

September

High season

February

Cheapest flight

$689
Best time to beat the crowds with an average 20% drop in price.
Most popular time to fly and prices are also 15% 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 $689 for a one-way ticket and $1,442 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 oneworld 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 $1,231 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 1542 reviews
8.6Crew
8.2Comfort
8.0Food
8.0Entertainment
8.4Boarding
Airline reviews

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.

10.0 ExcellentDamian, Mar 2024LAX - TPE
Read more about EVA Air reviews

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.

EVA would not help with ticket issue since they were purchased through a travel agency. Even though it was EVA ticket stock. Travel agency Budget Air didn't reissue ticket after airline change which I didn’t learn until trying to checkin on Christmas Day and there was no contact number for the agency to help. I will never use Budget Air to purchase flight again and disappointed in EVA’s refusal to help. Thankfully just under 12 hrs before departure someone from the agency was available to reissue tickets. I was starting to think we would not be flying and the stress trying to resolve was completely unacceptable.

seamless check in/ friendly staff, food is good, always love flying Eva Air

Very uncomfortable and crowded seats in economy. Flight attendant refused request to move to nearby unused seat with more legroom because “It was more money for that seat”. It was also near impossible to reach airline directly by phone. Waits upwards of an hour and not very helpful customer service representatives after long wait. Cannot recommend this airline.

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.

I didn’t like the check in process I had to check in at the counter took too much time . Didn’t give the upgrade my seat .

l enjoyed the variety of good and drink choices. The flight attendants were very quick and efficient to our needs.

Truly impressive service in the air. After the main meal, they have a delicious a la carte menu that you can order anytime until 1.5 hrs prior to landing. Flight crew were so pleasant and very efficient. Wish I could fly JAL more often!

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.

They close their counter so early. I had internet issues so I couldn’t check In online . I would have made the flight but their counter was closed 5 minutes before we arrived. No way of contacting them even though I had the confirmation number and tried to check in the night before on someone else’s phone. I tried calling their customer service with no pick up. Horrible experience, I’m very unhappy with them. I hope to never fly with them ever again. It costed me almost $900.

The seat comfort, the food and of course the crew, they made you feel welcome and relaxed 😊

Due to the delay of my first flight, my connecting flight with JetBlue was canceled by Singapore Airlines, but the JetBlue crew was very accommodating and rebooked a seat for me. The crew was very nice and had good attitude.

The overall operation needs to be improved. The in-flight services took forever and sometimes ran out of options.

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.
7/29Mon
1 stopSingapore Airlines
30h 35mSFO-USM
$689
8/1Thu
2 stopsEVA Air
23h 45mSFO-USM
$744
7/30Tue
1 stopSingapore Airlines
30h 35mSFO-USM
$754
7/30Tue
2 stops
24h 05mSFO-USM
$782
7/31Wed
2 stopsEVA Air
29h 15mSFO-USM
$809
7/28Sun
2 stops
22h 20mSFO-USM
$838
8/1Thu
1 stopSingapore Airlines
44h 00mSFO-USM
$846
8/1Thu
3 stops
26h 35mSFO-USM
$874
7/29Mon
3 stops
29h 35mSFO-USM
$877
7/28Sun
1 stopCathay Pacific
27h 40mSFO-USM
$1,014

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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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