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Ko Samui

$407+ Cheap flights from California to Ko 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 11/11. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — USM
oct. 16 — oct. 231
jue. 10/16
jue. 10/23
1 adult, Economy
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Cheap flight deals from California to Ko Samui

Keep the following information in mind while searching for California to Ko Samui flight deals. Data was last updated septiembre 16, 2025.

Round-trip from

$691
(FlightHub)

One-way from

$407
(Kiwi.com)

Popular in

June

Cheapest in

September

Average price

$775
From California to Ko Samui
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One-way flight from California to Ko Samui
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Highest demand for flights based on searches. 11% potential increase in price ($156 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($30 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from California to Ko Samui

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

This Trip.com deal was found by Cheapflights users on 9/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/3012:10 pmLAX - USM
1 stop41h 25mMultiple Airlines
jue. 11/611:40 amUSM - LAX
1 stop22h 45mMultiple Airlines
Deal found 9/15$745
This FlightHub deal was found by Cheapflights users on 9/14. 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.
mié. 10/2211:30 amSFO - USM
1 stop33h 40mSingapore Airlines
mar. 11/116:05 pmUSM - SFO
1 stop28h 45mSingapore Airlines
Deal found 9/14$757
This Justfly.com deal was found by Cheapflights users on 9/14. 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.
lun. 10/2011:30 amSFO - USM
1 stop30h 20mSingapore Airlines
mar. 1/206:05 pmUSM - SFO
1 stop28h 45mSingapore Airlines
Deal found 9/14$765
This Expedia deal was found by Cheapflights users on 9/14. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/2911:05 pmLAX - USM
1 stop28h 05mSingapore Airlines
mié. 11/58:55 amUSM - LAX
1 stop26h 00mSingapore Airlines
Deal found 9/14$794
This Justfly.com deal was found by Cheapflights users on 9/14. 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.
mié. 11/59:40 amSFO - USM
1 stop31h 20mSingapore Airlines
vie. 11/147:45 pmUSM - SFO
1 stop27h 05mSingapore Airlines
Deal found 9/14$843
This Justfly.com deal was found by Cheapflights users on 9/14. 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.
lun. 9/2912:00 pmSFO - USM
1 stop29h 50mSingapore Airlines
mié. 10/297:45 pmUSM - SFO
1 stop27h 05mSingapore Airlines
Deal found 9/14$848
This Justfly.com deal was found by Cheapflights users on 9/14. 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.
mié. 10/111:40 pmLAX - USM
1 stop21h 30mSingapore Airlines
mié. 10/812:05 pmUSM - LAX
1 stop23h 45mSingapore Airlines
Deal found 9/14$856
This Justfly.com deal was found by Cheapflights users on 9/15. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/1312:25 pmLAX - USM
2 stops31h 35mSingapore Airlines
mié. 12/312:00 pmUSM - LAX
1 stop21h 10mSingapore Airlines
Deal found 9/15$869
This FlightHub deal was found by Cheapflights users on 9/15. 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.
dom. 11/99:40 amSFO - USM
1 stop31h 20mSingapore Airlines
vie. 11/1412:00 pmUSM - SFO
1 stop34h 50mSingapore Airlines
Deal found 9/15$891
This Justfly.com deal was found by Cheapflights users on 9/14. 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.
mié. 10/88:40 pmLAX - USM
1 stop24h 30mSingapore Airlines
mié. 10/158:45 amUSM - LAX
1 stop27h 05mSingapore Airlines
Deal found 9/14$899
This Justfly.com deal was found by Cheapflights users on 9/13. 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.
vie. 11/289:40 amSFO - USM
1 stop31h 20mSingapore Airlines
jue. 12/116:05 pmUSM - SFO
1 stop28h 45mSingapore Airlines
Deal found 9/13$911
This Justfly.com deal was found by Cheapflights users on 9/16. 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.
mar. 12/309:40 amSFO - USM
1 stop31h 20mSingapore Airlines
lun. 2/212:00 pmUSM - SFO
1 stop34h 50mSingapore Airlines
Deal found 9/16$926

Cheapflights Fare Finder

 
Customize your flight search to find flights from California to Ko 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 septiembre 16, 2025.
Use the filters below to find and compare flights from California to Ko Samui that are best for you.

Fly from

California

Fly to

Ko Samui

Route

Depart

Return

Price

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

jue. 1/22

10:05 pm-5:10 pm

1 stop28h 05m

Ko Samui

jue. 1/29

8:55 am-7:55 pm

1 stop26h 00m

$691

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

mié. 10/22

11:30 am-11:10 am

1 stop33h 40m

Ko Samui

mar. 11/11

6:05 pm-7:50 am

1 stop28h 45m

$757

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

vie. 2/6

7:50 pm-8:00 am

1 stop21h 10m

Ko Samui

mar. 2/10

7:45 pm-10:55 am

2 stops30h 10m

$766

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

jue. 10/30

11:55 pm-7:35 pm

1 stop29h 40m

Ko Samui

jue. 11/6

4:25 pm-12:30 am

2 stops23h 05m

$786

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

sáb. 2/28

10:05 pm-5:10 pm

1 stop28h 05m

Ko Samui

sáb. 3/14

8:55 am-8:55 pm

1 stop26h 00m

$788

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

sáb. 2/28

10:05 pm-5:10 pm

1 stop28h 05m

Ko Samui

sáb. 3/7

6:05 pm-10:55 am

2 stops31h 50m

$814

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

mar. 3/3

12:25 pm-8:00 am

2 stops28h 35m

Ko Samui

mar. 3/31

7:25 pm-12:50 pm

2 stops31h 25m

$823

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

vie. 2/6

7:50 pm-8:00 am

1 stop21h 10m

Ko Samui

sáb. 2/14

8:55 am-7:55 pm

1 stop26h 00m

$843

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

dom. 11/9

9:40 am-8:00 am

1 stop31h 20m

Ko Samui

vie. 11/14

12:00 pm-7:50 am

1 stop34h 50m

$891

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

vie. 11/28

9:40 am-8:00 am

1 stop31h 20m

Ko Samui

jue. 12/11

6:05 pm-7:50 am

1 stop28h 45m

$911

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 38 results
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Best time to book a flight from California to Ko Samui

Have a flexible travel schedule? Discover the best time to fly to Ko Samui from California 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.

Cheapflights Insights

Everything you need to know about your flight from California to Ko Samui

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

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from California to Ko Samui as you normally would.

How much does it cost to fly round-trip from California to Ko Samui?

Related info for your journey

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

  • What airport do you fly into for flights to Ko Samui from California?

    Ko Samui (USM), located 2.1 mi from the city center, is the airport you fly into when you book flights from California to Ko Samui.

  • How long is the flight from California to Ko Samui?

    Departing from California to Ko Samui will take you 23h. The distance between California and Ko Samui is about 8173 mi. This flight may include one or multiple stops.

  • What are the most popular routes from California to Ko Samui?

    When deciding which route to take from California to Ko Samui consider San Francisco - Ko Samui, Los Angeles - Ko Samui or San Jose - Ko Samui as they are the most popular.

  • Can I find deals for flights from California to Ko Samui that include hotel bookings?

    Yes. In addition to deals on California to Ko Samui flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from California to Ko Samui?

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

  • Can I find deals for business class flights from California to Ko Samui?

    Yes. Cheapflights offers flight deals from California to Ko 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 Ko Samui?

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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for California to Ko Samui

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from California to Ko Samui

Discover the top 2 airlines that operate flights from California to Ko 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 septiembre 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$756Average$1,154FlexibilityNo cancel feeOn-time81%
EVA AirCheapest$1,045Average$1,155FlexibilityNo cancel feeOn-time74%

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