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Koh Samui

$636+ Cheap flights from San Francisco (SFO) to Koh Samui (USM)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/5. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — USM
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
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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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,041
(oojo)

One-way from

$636
(oojo)

Popular in

December

Cheapest in

October

Average price

$1,166
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
One-way flight from San Francisco to Ko Samui
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($96 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($56 potential savings vs. average RT price).
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Average for round-trip flights in February 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 February 20, 2025.

This FlightHub deal was found by Cheapflights users on 2/18. 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.
Wed 3/1910:40 amSFO - USM
1 stop31h 20mSingapore Airlines
Wed 3/268:55 amUSM - SFO
1 stop37h 55mSingapore Airlines
Deal found 2/18$820
This oojo deal was found by Cheapflights users on 2/18. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/1812:40 amSFO - USM
2 stops26h 20mEVA Air
Wed 3/267:55 amUSM - SFO
2 stops22h 05mEVA Air
Deal found 2/18$1,005
This Expedia deal was found by Cheapflights users on 2/20. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/159:40 amSFO - USM
1 stop31h 20mMultiple Airlines
Tue 11/253:50 pmUSM - SFO
2 stops31h 00mMultiple Airlines
Deal found 2/20$1,127
This Kissandfly.com deal was found by Cheapflights users on 2/19. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/2510:40 pmSFO - USM
1 stop29h 35mBangkok Airways
Sat 5/310:55 amUSM - SFO
2 stops23h 20mBangkok Airways
Deal found 2/19$1,322
This Kiwi.com deal was found by Cheapflights users on 2/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2312:20 amSFO - USM
1 stop28h 15mCathay Pacific
Fri 5/210:55 amUSM - SFO
1 stop20h 35mCathay Pacific
Deal found 2/19$1,599
This Emirates deal was found by Cheapflights users on 2/19. 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.
Thu 2/203:40 pmSFO - USM
2 stops59h 35mEmirates
Tue 7/154:25 pmUSM - SFO
2 stops35h 35mEmirates
Deal found 2/19$3,259
This business-class.com deal was found by Cheapflights users on 2/19. 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.
Sun 7/1312:25 pmSFO - USM
2 stops29h 50mJapan Airlines
Sun 7/209:10 pmUSM - SFO
3 stops34h 13mJapan Airlines
Deal found 2/19$4,052
This AranGrant deal was found by Cheapflights users on 2/19. 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.
Mon 3/103:45 pmSFO - USM
2 stops28h 50mQatar Airways
Tue 4/297:00 pmUSM - SFO
2 stops32h 50mQatar Airways
Deal found 2/19$5,583
This Lufthansa deal was found by Cheapflights users on 2/19. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/109:35 pmSFO - USM
2 stops33h 10mLufthansa
Wed 4/301:30 pmUSM - SFO
2 stops37h 10mLufthansa
Deal found 2/19$9,088

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 February 20, 2025.

Fly from

San Francisco

Fly to

Koh Samui

Route

Depart

Return

Price

San FranciscoKoh Samui

SFO - USM

SFOUSM

San Francisco

Wed 3/19

10:40 am-8:00 am

1 stop31h 20m

Ko Samui

Wed 3/26

8:55 am-8:50 am

1 stop37h 55m

$820

San FranciscoKoh Samui

SFO - USM

SFOUSM

San Francisco

Tue 3/18

12:40 am-5:00 pm

2 stops26h 20m

Ko Samui

Wed 3/26

7:55 am-4:00 pm

2 stops22h 05m

$1,005

San FranciscoKoh Samui

SFO - USM

SFOUSM

San Francisco

Thu 4/24

12:25 am-1:45 pm

2 stops23h 20m

Ko Samui

Sat 5/3

8:00 am-4:10 pm

2 stops22h 10m

$1,148

San FranciscoKoh Samui

SFO - USM

SFOUSM

San Francisco

Fri 4/25

10:40 pm-6:15 pm

1 stop29h 35m

Ko Samui

Sat 5/3

10:55 am-8:15 pm

2 stops23h 20m

$1,322

San FranciscoKoh Samui

SFO - USM

SFOUSM

San Francisco

Wed 4/23

12:20 am-6:35 pm

1 stop28h 15m

Ko Samui

Fri 5/2

10:55 am-5:30 pm

1 stop20h 35m

$1,599

San FranciscoKoh Samui

SFO - USM

SFOUSM

San Francisco

Mon 3/10

3:45 pm-10:35 am

2 stops28h 50m

Ko Samui

Tue 4/29

7:00 pm-1:50 pm

2 stops32h 50m

$5,583

San FranciscoKoh Samui

SFO - USM

SFOUSM

San Francisco

Sat 4/5

5:05 pm-4:55 pm

2 stops33h 50m

Ko Samui

Sat 4/12

8:45 am-2:00 pm

2 stops43h 15m

$6,008

San FranciscoKoh Samui

SFO - USM

SFOUSM

San Francisco

Mon 3/10

9:35 pm-8:45 pm

2 stops33h 10m

Ko Samui

Wed 4/30

1:30 pm-12:40 pm

2 stops37h 10m

$9,088

San FranciscoKoh Samui

SFO - USM

SFOUSM

San Francisco

Mon 3/10

1:55 pm-7:40 am

2 stops27h 45m

Ko Samui

Tue 4/29

7:00 am-11:48 pm

3 stops30h 48m

$12,157

San FranciscoKoh Samui

SFO - USM

SFOUSM

San Francisco

Sat 4/5

1:05 am-4:50 pm

2 stops25h 45m

$636

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 14 results
1
2

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 February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star
CheapfaremartPrice Accuracy-Trust Score*3 stars

*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 February 20, 2025.

It’s typically best to fly out from San Francisco to Koh Samui at noon. Doing so could potentially save you 27% on the flight price compared to flying in the morning, which is usually more expensive.

What is the cheapest day to fly from San Francisco to Koh Samui?

Use this chart to determine the cheapest time to fly round-trip from San Francisco to Koh Samui. Price data was last updated on February 16, 2025.

Travelers seeking maximum savings on their San Francisco to Koh Samui flight should consider departing on Tuesday at noon when fares are most often at their lowest. Wednesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 February 20, 2025.
EVA Air
8.4
Very good
1,200 reviews

Entertainment

8.0

Boarding

8.4

Overall

8.4

Comfort

8.3

Food

8.0

Crew

8.6

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

EVA Air
8.4
Very good
1,200 reviews
EVA Air
8.4
Very good
1,200 reviews

Entertainment

8.0

Boarding

8.4

Overall

8.4

Comfort

8.3

Food

8.0

Crew

8.6

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

Japan Airlines
8.3
Very good
1,440 reviews
EVA Air
8.4
Very good
1,200 reviews

Entertainment

8.0

Boarding

8.4

Overall

8.4

Comfort

8.3

Food

8.0

Crew

8.6

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

China Airlines
8.2
Very good
727 reviews
EVA Air
8.4
Very good
1,200 reviews

Entertainment

8.0

Boarding

8.4

Overall

8.4

Comfort

8.3

Food

8.0

Crew

8.6

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

Emirates
8.1
Very good
3,276 reviews
EVA Air
8.4
Very good
1,200 reviews

Entertainment

8.0

Boarding

8.4

Overall

8.4

Comfort

8.3

Food

8.0

Crew

8.6

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

Singapore Airlines
8.1
Very good
1,301 reviews
EVA Air
8.4
Very good
1,200 reviews

Entertainment

8.0

Boarding

8.4

Overall

8.4

Comfort

8.3

Food

8.0

Crew

8.6

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

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, EVA Air ($1,041), Singapore Airlines ($1,218), and Cathay Pacific ($1,725) offers the cheapest pricing from San Francisco to Koh Samui. EVA Air is currently priced 23% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from San Francisco to Koh Samui one-way?

    The cheapest airlines for a one-way flight from San Francisco to Koh Samui are EVA Air ($669), Singapore Airlines ($731), and Cathay Pacific ($839).

  • 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

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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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$910Average$1,201FlexibilityNo cancel feeOn-time81%
EVA AirCheapest$1,052Average$1,165FlexibilityNo cancel feeOn-time74%
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