HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Koh Samui

$882+ Cheap flights from San Francisco (SFO) to Koh Samui (USM)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — USM
Jan 21 — Jan 281
Tue 1/21
Tue 1/28
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from San Francisco to Koh Samui with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from San Francisco to Koh Samui

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to Koh Samui (USM). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 16, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$882
(FlightHub)

Popular in

December

Cheapest in

October

Average price

$1,112
Provider with most accurate pricing for San Francisco-Ko Samui flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Francisco-Ko Samui flights.
Search Deals
From San Francisco to Ko Samui
Search Deals
High demand for flights, 6% potential price rise
Search Deals
Best time to find cheap flights, 4% potential price drop
Search Deals
Average for round-trip flights in January 2025
Search Deals

Find flight deals from San Francisco to Koh Samui

Cheapest flights from San Francisco to Koh Samui
Explore the most affordable flight options available from San Francisco to Koh Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 16, 2025.

This FlightHub deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/219:40 amSFO - USM
1 stop31h 20mSingapore Airlines
Mon 1/278:55 amUSM - SFO
1 stop37h 55mSingapore Airlines
Deal found 1/15$894
This FlightHub deal was found by Cheapflights users on 1/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/61:05 amSFO - USM
2 stops24h 05mMultiple Airlines
Sat 4/122:00 pmUSM - SFO
2 stops19h 55mMultiple Airlines
Deal found 1/14$1,068
This Justfly.com deal was found by Cheapflights users on 1/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/1512:10 amSFO - USM
2 stops24h 45mEVA Air
Sun 3/309:15 amUSM - SFO
2 stops20h 45mEVA Air
Deal found 1/14$1,110
This Gotogate deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/231:05 amSFO - USM
2 stops24h 05mChina Airlines
Wed 7/99:15 amUSM - SFO
2 stops25h 15mChina Airlines
Deal found 1/15$1,628
This Gurufare deal was found by Cheapflights users on 1/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/1412:35 amSFO - USM
1 stop29h 00mCathay Pacific
Sat 3/2911:40 amUSM - SFO
1 stop24h 35mCathay Pacific
Deal found 1/14$1,642
This Qatar Airways deal was found by Cheapflights users on 1/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/163:45 pmSFO - USM
2 stops28h 55mQatar Airways
Sun 3/305:55 pmUSM - SFO
2 stops33h 55mQatar Airways
Deal found 1/14$1,834
This British Airways deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/174:35 pmSFO - USM
2 stops38h 35mBritish Airways
Sun 7/274:25 pmUSM - SFO
2 stops35h 25mBritish Airways
Deal found 1/15$2,243
This Emirates deal was found by Cheapflights users on 1/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Emirates is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/23:40 pmSFO - USM
2 stops35h 35mEmirates
Sun 3/91:25 pmUSM - SFO
2 stops38h 25mEmirates
Deal found 1/15$5,097
This business-class.com deal was found by Cheapflights users on 1/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure business-class.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/126:00 pmSFO - USM
3 stops36h 45mJapan Airlines
Wed 3/268:20 pmUSM - SFO
2 stops28h 30mJapan Airlines
Deal found 1/14$10,009
This AranGrant deal was found by Cheapflights users on 1/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure AranGrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/128:25 pmSFO - USM
2 stops28h 30mSWISS
Wed 3/269:20 amUSM - SFO
2 stops46h 05mSWISS
Deal found 1/14$10,330

Find flights from San Francisco to Koh Samui within your budget

Customize your flight search to find flights from San Francisco to Koh 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, Cheapflights users made 2,558,603 searches. Data last updated January 16, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

San FranciscoKoh Samui

SFO - USM

SFOUSM

San Francisco

Mon 3/3

9:40 am-8:00 am

1 stop31h 20m

Ko Samui

Wed 3/26

8:55 am-8:50 am

1 stop37h 55m

$882

San FranciscoKoh Samui

SFO - USM

SFOUSM

San Francisco

Mon 3/3

11:50 pm-5:10 pm

2 stops26h 20m

Ko Samui

Wed 3/26

10:00 am-4:00 pm

2 stops20h 00m

$1,005

San FranciscoKoh Samui

SFO - USM

SFOUSM

San Francisco

Sun 4/6

1:05 am-12:45 pm

2 stops21h 40m

Ko Samui

Sat 4/12

10:05 am-7:55 pm

2 stops23h 50m

$1,081

San FranciscoKoh Samui

SFO - USM

SFOUSM

San Francisco

Sun 3/2

3:40 pm-6:15 pm

2 stops35h 35m

Ko Samui

Sun 3/9

1:25 pm-12:50 pm

2 stops38h 25m

$3,558

San FranciscoKoh Samui

SFO - USM

SFOUSM

San Francisco

Sun 3/2

3:40 pm-6:15 pm

2 stops35h 35m

$1,591

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/16

Compare providers for flights from San Francisco to Koh Samui

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from San Francisco to Koh Samui in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on San Francisco-Koh Samui flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Francisco-Koh Samui flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Francisco-Koh Samui flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on San Francisco-Koh Samui flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for San Francisco-Koh Samui flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from San Francisco to Koh Samui

Have a flexible travel schedule? Discover the best time to fly to Koh Samui from San Francisco with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from San Francisco to Koh Samui

Get recent, data-driven insights about flights from San Francisco to Koh Samui including ideal travel times, pricing trends, and more.

What is the cheapest time of day to fly from SFO to USM?

Find hourly flight availability from San Francisco to Koh Samui. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 16, 2025.

It’s typically best to fly out from San Francisco to Koh Samui at noon. Doing so could potentially save you 18% on the flight price compared to flying in the afternoon, which is usually more expensive.

Rainfall in Koh Samui by month

Plan your trip to Koh Samui by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Koh Samui ranges from 2.3 - 19.3 inches per month. November is typically the wettest month, when rainfall can reach 19.3 in. February is typically the driest time to visit Koh Samui when rainfall is around 2.3 in.

Temperature in Koh Samui by month

Plan your trip to Koh Samui by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Koh Samui, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 80.6 F).

Reviews of airlines servicing Koh Samui

Get insights into the airlines that provide service to Koh Samui. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Koh Samui. Reviews last updated January 16, 2025.
Get a feel of what it's like to fly with Singapore Airlines and EVA Air from San Francisco to Koh Samui by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very good
1,248 reviews

Crew

8.6

Comfort

8.2

Food

8.0

Overall

8.4

Boarding

8.4

Entertainment

8.0

Reviews

1 / 10

The food was HORRIBLE, the flight crew looked as though they’d rather be getting a root canal, and the bathrooms were disgusting.

EVA Air
8.4
Very good
1,248 reviews
EVA Air
8.4
Very good
1,248 reviews

Crew

8.6

Comfort

8.2

Food

8.0

Overall

8.4

Boarding

8.4

Entertainment

8.0

Reviews

1 / 10

The food was HORRIBLE, the flight crew looked as though they’d rather be getting a root canal, and the bathrooms were disgusting.

Japan Airlines
8.3
Very good
1,448 reviews
EVA Air
8.4
Very good
1,248 reviews

Crew

8.6

Comfort

8.2

Food

8.0

Overall

8.4

Boarding

8.4

Entertainment

8.0

Reviews

1 / 10

The food was HORRIBLE, the flight crew looked as though they’d rather be getting a root canal, and the bathrooms were disgusting.

Emirates
8.1
Very good
3,350 reviews
EVA Air
8.4
Very good
1,248 reviews

Crew

8.6

Comfort

8.2

Food

8.0

Overall

8.4

Boarding

8.4

Entertainment

8.0

Reviews

1 / 10

The food was HORRIBLE, the flight crew looked as though they’d rather be getting a root canal, and the bathrooms were disgusting.

Singapore Airlines
8.1
Very good
1,327 reviews
EVA Air
8.4
Very good
1,248 reviews

Crew

8.6

Comfort

8.2

Food

8.0

Overall

8.4

Boarding

8.4

Entertainment

8.0

Reviews

1 / 10

The food was HORRIBLE, the flight crew looked as though they’d rather be getting a root canal, and the bathrooms were disgusting.

Qatar Airways
7.5
Good
3,752 reviews
EVA Air
8.4
Very good
1,248 reviews

Crew

8.6

Comfort

8.2

Food

8.0

Overall

8.4

Boarding

8.4

Entertainment

8.0

Reviews

1 / 10

The food was HORRIBLE, the flight crew looked as though they’d rather be getting a root canal, and the bathrooms were disgusting.

Related info for your journey

Find useful and relevant information for your journey from San Francisco to Koh Samui. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from San Francisco to Koh Samui round-trip?

    According to our current data, Singapore Airlines ($882), EVA Air ($1,005), and Turkish Airlines ($1,747) offers the cheapest pricing from San Francisco to Koh Samui. Singapore Airlines is currently priced 35% below the average price you’ll pay for this route.

  • Can I find deals for flights from San Francisco to Koh Samui that include hotel bookings?

    Yes. In addition to deals on San Francisco to Koh Samui flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from San Francisco to Koh Samui?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Francisco to Koh Samui.

  • Can I find deals for business class flights from San Francisco to Koh Samui?

    Yes. Cheapflights offers flight deals from San Francisco to Koh Samui by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Ko Pha Ngan
Ko Tao

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for San Francisco to Koh Samui

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Suvarnabhumi flights
San Francisco to Suvarnabhumi flights
Los Angeles to Don Mueang Intl flights
Ontario to Suvarnabhumi flights
San Francisco to Don Mueang Intl flights
San Jose to Suvarnabhumi flights
Las Vegas to Suvarnabhumi flights
San Diego to Suvarnabhumi flights
Burbank to Suvarnabhumi flights
Santa Ana to Suvarnabhumi flights
Los Angeles to Phuket City flights
Oakland to Suvarnabhumi flights
San Francisco to Phuket City flights
Los Angeles to Chiang Mai flights
Ontario to Phuket City flights
Sacramento to Suvarnabhumi flights
San Francisco to Chiang Mai flights
Burbank to Phuket City flights
Santa Ana to Phuket City flights
Ontario to Chiang Mai flights
Los Angeles to Koh Samui flights
San Jose to Phuket City flights
Oakland to Phuket City flights
Fresno to Suvarnabhumi flights
San Jose to Chiang Mai flights
Reno to Suvarnabhumi flights
Las Vegas to Don Mueang Intl flights
Santa Rosa to Suvarnabhumi flights
San Diego to Don Mueang Intl flights
Medford to Suvarnabhumi flights
Ontario to Don Mueang Intl flights
San Francisco to Chiang Rai flights
San Diego to Phuket City flights
Las Vegas to Phuket City flights
Los Angeles to Krabi flights
Sacramento to Don Mueang Intl flights
Arcata to Suvarnabhumi flights
San Francisco to Krabi flights
San Francisco to Rayong flights
Las Vegas to Chiang Mai flights
Sacramento to Phuket City flights
San Jose to Don Mueang Intl flights
San Diego to Krabi flights
San Francisco to Hat Yai flights
Palm Springs to Suvarnabhumi flights
San Diego to Chiang Mai flights
San Jose to Koh Samui flights

Top 2 airlines flying from San Francisco to Koh Samui

Discover the top 2 airlines that operate flights from San Francisco to Koh Samui. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$910Average$1,146FlexibilityNo cancel feeOn-time81%
EVA AirCheapest$1,052Average$1,168FlexibilityNo cancel feeOn-time74%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.