SFO - USM

$654 Find Cheap Flights from San Francisco to Ko 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 Ko Samui departing on 6/30. 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.
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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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Flights Deals

Cheap Flights from San Francisco to Ko Samui

 
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.

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

KAYAK's recommended round-trip deals from the most popular airlines that fly from San Francisco to Ko Samui.
Discover the best prices for you by selecting your travel dates on KAYAK.
Singapore Airlines Logo
11:30 am - 7:50 amSFO-USM
30h 20m1 stop
Singapore Airlines Logo
5:50 pm - 9:40 amUSM-SFO
29h 50m1 stop
$807Singapore Airlines
Find Deal
Mon, Sep 15 - Wed, Oct 8
Singapore Airlines Logo
11:30 am - 7:50 amSFO-USM
30h 20m1 stop
Singapore Airlines Logo
5:50 pm - 9:40 amUSM-SFO
29h 50m1 stop
$878Singapore Airlines
Find Deal
Mon, Sep 1 - Fri, Sep 12
 Logo
11:30 am - 3:10 pmSFO-USM
37h 40m2 stops
 Logo
7:00 am - 9:40 amUSM-SFO
40h 40m2 stops
Mon, Sep 15 - Wed, Oct 8
EVA Air Logo
1:25 am - 1:45 pmSFO-USM
22h 20m2 stops
EVA Air Logo
9:15 am - 4:00 pmUSM-SFO
20h 45m2 stops
$1,007EVA Air
Find Deal
Mon, Sep 15 - Thu, Oct 9
EVA Air Logo
1:25 am - 1:45 pmSFO-USM
22h 20m2 stops
EVA Air Logo
9:15 am - 4:00 pmUSM-SFO
20h 45m2 stops
$1,028EVA Air
Find Deal
Tue, Sep 16 - Wed, Oct 8
China Airlines Logo
1:05 am - 12:45 pmSFO-USM
21h 40m2 stops
China Airlines Logo
8:00 am - 7:55 pmUSM-SFO
25h 55m2 stops
$1,128China Airlines
Find Deal
Sun, Sep 14 - Tue, Oct 7
 Logo
11:30 am - 7:50 amSFO-USM
30h 20m1 stop
 Logo
2:35 pm - 8:30 pmUSM-SFO
19h 55m2 stops
$1,373
Find Deal
Mon, Sep 1 - Fri, Sep 12
Cathay Pacific Logo
1:05 am - 6:35 pmSFO-USM
27h 30m1 stop
Cathay Pacific Logo
7:00 am - 5:30 pmUSM-SFO
24h 30m2 stops
$1,395Cathay Pacific
Find Deal
Sun, Sep 14 - Wed, Oct 8
Cathay Pacific Logo
1:05 am - 6:35 pmSFO-USM
27h 30m1 stop
Cathay Pacific Logo
10:55 am - 5:50 pmUSM-SFO
20h 55m1 stop
$1,423Cathay Pacific
Find Deal
Sun, Aug 31 - Fri, Sep 12
China Airlines Logo
1:05 am - 2:45 pmSFO-USM
23h 40m2 stops
China Airlines Logo
10:05 am - 7:54 amUSM-SFO
35h 49m3 stops
$2,658China Airlines
Find Deal
Sat, Jul 12 - Sun, Jul 20
Expert advice

Expert advice for your flight from San Francisco to Ko Samui

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
Sun Country Air

Sun Country's Best seats offer 34 inches legroom, preferred boarding, and free entertainment.


Sun Country's app provides easy check-in and mobile boarding passes for convenience.

Delta

Delta One offers lie-flat seats with privacy doors on select aircraft for enhanced comfort.


Free Wi-Fi for SkyMiles members on most flights; sign up onboard if not a member.

Read more about Deltaby Stefanie Waldek
Our travel experts
Daniel Scheffler

Daniel Scheffler

Expert on Sun Country Air

Daniel Scheffler

Daniel Scheffler

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.

Read more
Stefanie Waldek

Stefanie Waldek

Expert on Delta

Stefanie Waldek

Stefanie Waldek

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.

Read more
Useful Info

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.

What’s the cheapest day of the week to fly from San Francisco to Ko Samui?

The average price of all round-trip flights from San Francisco to Ko Samui clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to Ko Samui on a Monday, as we generally find the cheapest rates on that day for this route. On the other hand, Friday is the most expensive day to fly from San Francisco to Ko Samui. For your return ticket, we recommend flying on a Monday and avoiding Saturdays for the best deals.

What is the cheapest month to fly from San Francisco to Ko Samui?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Francisco to Ko Samui, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from San Francisco to Ko Samui is October, where tickets cost $1,057 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is $1,980 and $1,844 respectively.

Good to know

Low seasonMay
High seasonMarch
Cheapest flight$654
Best time to beat the crowds with an average 16% drop in price.
Most popular time to fly and prices are also 15% lower on average.
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 $654 for a one-way ticket and $807 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, oneworld, and SkyTeam are the airline alliances operating flights between San Francisco and Ko Samui, with SkyTeam being the most commonly used for this route.

  • 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 $1,138 and an overall rating of 8.4, EVA Air is the most popular choice. Singapore Airlines is also a great choice for the route, with an average price of $1,151 and an overall rating of 8.1.

  • 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.

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.
8.4
EVA AirOverall score based on 1186 reviews
8.3Comfort
8.4Boarding
8.0Entertainment
8.6Crew
8.1Food
Airline reviews

First time traveling with EVA.. great experience in economy class... Personnel very friendly..

10.0 ExcellentJaime, Apr 2025DPS - TPE
Read more EVA Air reviews

First time traveling with EVA.. great experience in economy class... Personnel very friendly..

Sub sandwhich for a snack through mid flight and giving a bottle water was a good idea

I appreciate the email reminders for online check-in which made my entry to the lines less stressful. The flight was on schedule and on time. The baording staff were proactively helpful and approachable. The airplane inflight food, entertainment and comfies as well as provisions are excellent even in the economy seating. The airline transfer was smooth and easy! Luggage safe and intact! Thank you EVA airline for making my trip a reliable safe and comfortable experience.

I was sleep when they brought the food. They had put a note on my seat. There was no food when I asked for food later. There was just one main meal served in this 14 hours flight. They offered me sandwich with ham which I don’t eat since I am pescatarian. Long story short I had to wait to get to TPE to get something to eat. I am extremely disappointed from the service. I have been flying EVA since I was 1 year old. Perhaps no more EVA for me. Seems EVA glorious day is long gone

Excellent food. Good service. Crammed Premium Economy seats. I Asked to change seats during check in. They told me the flight was fully booked. But on board I saw empty seats where I could have been easily relocated.

basic and only minimum of service, they offer nothing special

Good. Please add a non- applicable category to your questions.

The app was awful. No accurate info. Paying for internet is a negative (Delta is free). The crew was very nice for the most part although you are not guaranteed to get good service. Some crew would ignore requests for things as simple as a cup of water if you were sleeping when the first serving was made. Food was great. Male crew member was exceptionally kind and responsive.

It was a good flight. I would highly recommend it to family and friends.

The employees were professional and efficient. I consider myself a traveler but have trouble with the international fare served on airplanes. I admit Americans buy their food in the supermarket and we typically don’t eat the ligaments and cartilage. I know that is whiny but as I age, I dislike it more. At least things weren’t covered in cheese. The desserts are terrible! My neighbor didn’t eat her bread so I asked if I could have it. First time for everything but had been traveling a total of 27 hours and was hungry.

Very good flight from Boarding to landing -efficient and comfortable with decent entertainment options

Construction at PDX resulting in very lung walk from the rental car to the gate. SFO, extremely long walk between terminals to get to connecting Singapore airlines flight. My smart watch recorded a total of 3 miles.

Crew and service was excellent, but passengers should be offered a welcome drink before take off which did not happen. Food was very good. Unfortunately the lie-flat bed in business class was one of the most uncomfortable I have experienced. The configuration forces you to sleep with your legs at an angle instead of in a straight line, plus there is very little padding on the bed so it wasn't possible to sleep for more than 2-3 hours on an 18 hour flight. For what the airlines charges for a business class ticket their hard product leaves a lot to be desired.

So happy I flew with Singapore Airlines. The customer service is top notch. I am terrified of flying and the staff made me feel so at ease. Will only fly Singapore internationally moving forward.

Everything was great keep up the good work 😁, can't ask for more.

Flight from SFO did not include entertainment as it was not working the entire duration of the flight. Was informed that there would be a $350 voucher for the inconvenience. Uncertain how the voucher will be provided.

The food options and quality could use some more excitement and variety.

Overall, very good. The food was better than expected with the exception of the pork and potatoes dinner at the end of the flight. My family all selected that dish and did not set it. I tried a bite also and it was honestly terrible. Also, it would be helpful to know when the snacks in the back of the plane are available.

Crews were very caring and polite. Washroom was surprisingly clean. Overall experience was good , only food choices was very limited. Thanks

On time boarding I would like to see ground hostess to help transit customers to direct them to the right terminal and boarding gate. Last night, all the transit customers on SQ484 arriving Singapore had to merry go round to look for terminal and boarding gate to board SQ128 transit to KL Malaysia. We went to Terminal 3 taking the Skytrain to T3 and back to T3 to get out to look for different Skytrain to T2. On arrival t2, we had to go round to ask which boarding gate to KL. We only had 5 minutes to make to the boarding time at 6:55pm but we already spent more than 30 minutes running around to find the boarding gate. We were late at the boarding gate.

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

Information on your arrival and departure airports

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