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Ko Samui

$426+ 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 10/9. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — USM
Sep 2 — Sep 91
Tue 9/2
Tue 9/9
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 August 28, 2025.

Round-trip from

$763
(FlightHub)

One-way from

$426
(Kiwi.com)

Popular in

June

Cheapest in

April

Average price

$1,159
From California to Ko Samui
Search Deals
One-way flight from California to Ko Samui
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Highest demand for flights based on searches. 9% potential increase in price ($122 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($26 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 28, 2025.

This FlightHub deal was found by Cheapflights users on 8/28. 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 10/2211:30 amSFO - USM
1 stop33h 40mSingapore Airlines
Tue 11/117:45 pmUSM - SFO
1 stop27h 05mSingapore Airlines
Deal found 8/28$763
This Trip.com deal was found by Cheapflights users on 8/27. 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.
Wed 9/1710:45 amSFO - USM
1 stop41h 30mMultiple Airlines
Wed 10/81:30 pmUSM - SFO
1 stop33h 45mMultiple Airlines
Deal found 8/27$779
This Justfly.com deal was found by Cheapflights users on 8/28. 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.
Wed 10/88:40 pmLAX - USM
1 stop21h 10mSingapore Airlines
Wed 10/228:45 amUSM - LAX
1 stop27h 05mSingapore Airlines
Deal found 8/28$801
This FlightHub deal was found by Cheapflights users on 8/28. 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 11/309:40 amSFO - USM
1 stop31h 20mSingapore Airlines
Wed 12/105:40 pmUSM - SFO
1 stop29h 10mSingapore Airlines
Deal found 8/28$812
This Justfly.com deal was found by Cheapflights users on 8/27. 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.
Sun 9/711:55 pmLAX - USM
1 stop26h 50mSingapore Airlines
Sat 9/137:25 pmUSM - LAX
1 stop37h 40mSingapore Airlines
Deal found 8/27$843
This Justfly.com deal was found by Cheapflights users on 8/27. 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.
Tue 9/212:00 pmSFO - USM
1 stop29h 50mSingapore Airlines
Thu 9/117:25 pmUSM - SFO
1 stop28h 15mSingapore Airlines
Deal found 8/27$850
This Trip.com deal was found by Cheapflights users on 8/28. 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.
Wed 10/812:50 pmLAX - USM
2 stops29h 25mMultiple Airlines
Wed 10/227:00 amUSM - LAX
2 stops27h 40mMultiple Airlines
Deal found 8/28$855
This Expedia deal was found by Cheapflights users on 8/28. 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.
Sun 10/1211:30 amSFO - USM
1 stop30h 20mSingapore Airlines
Sun 10/197:40 pmUSM - SFO
1 stop28h 00mSingapore Airlines
Deal found 8/28$897
This Trip.com deal was found by Cheapflights users on 8/28. 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.
Thu 11/2010:55 amLAX - USM
2 stops42h 30mMultiple Airlines
Thu 11/277:00 amUSM - LAX
2 stops21h 20mMultiple Airlines
Deal found 8/28$899
This FlightHub deal was found by Cheapflights users on 8/27. 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 12/79:40 amSFO - USM
1 stop31h 20mSingapore Airlines
Sun 12/215:40 pmUSM - SFO
1 stop29h 10mSingapore Airlines
Deal found 8/27$899
This Justfly.com deal was found by Cheapflights users on 8/25. 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.
Tue 11/1810:05 pmLAX - USM
1 stop21h 45mSingapore Airlines
Mon 11/2411:45 amUSM - LAX
1 stop23h 10mSingapore Airlines
Deal found 8/25$910
This Trip.com deal was found by Cheapflights users on 8/26. 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.
Fri 10/1012:50 pmLAX - USM
2 stops28h 30mMultiple Airlines
Fri 10/176:55 pmUSM - LAX
2 stops28h 50mMultiple Airlines
Deal found 8/26$921

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 August 28, 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

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Wed 10/22

11:30 am-11:10 am

1 stop33h 40m

Ko Samui

Tue 11/11

7:45 pm-7:50 am

1 stop27h 05m

$763

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Wed 9/17

10:45 am-6:15 pm

1 stop41h 30m

Ko Samui

Wed 10/8

1:30 pm-9:15 am

1 stop33h 45m

$779

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Wed 10/8

8:40 pm-7:50 am

1 stop21h 10m

Ko Samui

Wed 10/22

8:45 am-9:50 pm

1 stop27h 05m

$801

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Sun 9/7

11:55 pm-4:45 pm

1 stop26h 50m

Ko Samui

Sat 9/13

7:25 pm-7:05 pm

1 stop37h 40m

$843

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Tue 9/2

12:00 pm-7:50 am

1 stop29h 50m

Ko Samui

Thu 9/11

7:25 pm-9:40 am

1 stop28h 15m

$850

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Wed 10/8

12:50 pm-8:15 am

2 stops29h 25m

Ko Samui

Wed 10/22

7:00 am-8:40 pm

2 stops27h 40m

$855

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Mon 11/3

10:55 am-7:15 am

2 stops29h 20m

Ko Samui

Tue 11/11

7:10 pm-8:00 am

2 stops27h 50m

$855

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Sun 10/12

11:30 am-7:50 am

1 stop30h 20m

Ko Samui

Sun 10/19

7:40 pm-9:40 am

1 stop28h 00m

$897

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Thu 11/20

10:55 am-8:25 pm

2 stops42h 30m

Ko Samui

Thu 11/27

7:00 am-1:20 pm

2 stops21h 20m

$899

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Tue 11/18

10:05 pm-10:50 am

1 stop21h 45m

Ko Samui

Mon 11/24

11:45 am-7:55 pm

1 stop23h 10m

$910

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/27

Showing 1-10 of 36 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 August 28, 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.

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 33h 40m. The distance between California and Ko Samui is about 8173 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from California to Ko Samui one-way?

    The cheapest airlines for a one-way flight from California to Ko Samui are Singapore Airlines ($478), EVA Air ($633), and Cathay Pacific ($883).

  • 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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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 August 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$756Average$1,181FlexibilityNo cancel feeOn-time81%
EVA AirCheapest$1,048Average$1,152FlexibilityNo cancel feeOn-time74%

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