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Ko Samui

$450+ 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 2/24. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — USM
Dec 17 — Dec 241
Wed 12/17
Wed 12/24
1 adult, Economy
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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 November 17, 2025.

This Trip.com deal was found by Cheapflights users on 11/15. 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.
Wed 12/39:50 amLAX - USM
2 stops30h 55mMultiple Airlines
Wed 12/107:00 amUSM - LAX
2 stops39h 20mMultiple Airlines
Deal found 11/15$843
This Justfly.com deal was found by Cheapflights users on 11/17. 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 11/1812:25 pmLAX - USM
2 stops31h 35mSingapore Airlines
Tue 11/2512:00 pmUSM - LAX
1 stop22h 55mSingapore Airlines
Deal found 11/17$954
This FlightHub deal was found by Cheapflights users on 11/17. 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 11/1810:35 pmLAX - USM
2 stops26h 00mEVA Air
Tue 11/258:20 pmUSM - LAX
2 stops25h 40mEVA Air
Deal found 11/17$959
This oojo deal was found by Cheapflights users on 11/14. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/1510:40 pmLAX - USM
2 stops23h 00mMultiple Airlines
Sat 11/222:05 pmUSM - LAX
2 stops20h 20mMultiple Airlines
Deal found 11/14$1,009
This Trip.com deal was found by Cheapflights users on 11/15. 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.
Wed 12/39:50 amLAX - USM
2 stops30h 55mMultiple Airlines
Thu 12/187:15 amUSM - LAX
2 stops39h 05mMultiple Airlines
Deal found 11/15$1,049
This FlightHub deal was found by Cheapflights users on 11/15. 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.
Sat 11/1511:00 pmLAX - USM
2 stops25h 35mEVA Air
Mon 11/179:10 pmUSM - LAX
2 stops24h 50mEVA Air
Deal found 11/15$1,057
This Ovago deal was found by Cheapflights users on 11/17. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1810:35 pmLAX - USM
1 stop30h 00mCathay Pacific
Tue 11/2511:40 amUSM - LAX
1 stop36h 35mCathay Pacific
Deal found 11/17$1,177
This CheapOair deal was found by Cheapflights users on 11/15. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1810:35 pmLAX - USM
1 stop30h 00mMultiple Airlines
Tue 11/259:20 amUSM - LAX
2 stops24h 40mMultiple Airlines
Deal found 11/15$1,198
This oojo deal was found by Cheapflights users on 11/15. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/510:40 pmLAX - USM
2 stops23h 25mMultiple Airlines
Mon 12/157:55 amUSM - LAX
2 stops26h 30mMultiple Airlines
Deal found 11/15$1,218
This Justfly.com deal was found by Cheapflights users on 11/17. 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 12/109:40 amSFO - USM
1 stop31h 20mSingapore Airlines
Mon 12/298:55 amUSM - SFO
1 stop37h 55mSingapore Airlines
Deal found 11/17$1,721
This oojo deal was found by Cheapflights users on 11/17. 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.
Fri 11/215:15 pmLAS - USM
2 stops59h 20mCathay Pacific
Fri 11/2811:40 amUSM - LAS
2 stops47h 52mCathay Pacific
Deal found 11/17$1,798
This FlightHub deal was found by Cheapflights users on 11/17. 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 12/1011:30 pmSFO - USM
2 stops25h 10mEVA Air
Mon 12/297:55 amUSM - SFO
2 stops21h 55mEVA Air
Deal found 11/17$1,933

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 November 17, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$817
(Justfly.com)

One-way from

$450
(oojo)

Popular in

February

Cheapest in

September

Average price

$922
Provider with most accurate pricing for Los Angeles-Ko Samui flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Ko Samui flights.
Search Deals
From California to Ko Samui
Search Deals
One-way flight from California to Ko Samui
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($102 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($39 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

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 November 17, 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

Sun 5/10

11:30 am-4:45 pm

1 stop39h 15m

Ko Samui

Sun 5/31

8:45 am-9:40 am

1 stop38h 55m

$897

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Sun 5/3

11:30 am-4:45 pm

1 stop39h 15m

Ko Samui

Sun 5/31

8:45 am-9:40 am

1 stop38h 55m

$897

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Thu 2/26

9:40 am-8:00 am

1 stop31h 20m

Ko Samui

Mon 3/9

8:55 am-8:50 am

1 stop37h 55m

$929

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Thu 3/26

10:40 am-5:10 pm

1 stop40h 30m

Ko Samui

Thu 4/2

5:40 pm-9:40 am

1 stop30h 00m

$951

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Sat 5/9

12:50 am-5:05 pm

2 stops26h 15m

Ko Samui

Sun 5/31

7:30 pm-6:45 am

2 stops25h 15m

$978

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Mon 2/23

11:40 pm-1:05 pm

2 stops22h 25m

Ko Samui

Wed 3/4

2:30 pm-6:45 pm

2 stops19h 15m

$996

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Wed 3/25

12:40 am-3:40 pm

2 stops25h 00m

Ko Samui

Thu 4/2

2:00 pm-8:00 pm

2 stops20h 00m

$1,000

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Sun 3/15

12:40 am-2:55 pm

2 stops24h 15m

Ko Samui

Thu 3/19

8:30 am-4:00 pm

2 stops21h 30m

$1,003

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Sun 4/12

12:30 pm-8:15 am

2 stops29h 45m

Ko Samui

Thu 4/30

8:45 am-4:00 pm

2 stops21h 15m

$1,007

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Wed 12/3

9:50 am-7:45 am

2 stops30h 55m

Ko Samui

Thu 12/18

7:15 am-7:20 am

2 stops39h 05m

$1,049

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/16

Showing 1-10 of 33 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 month to book a flight from California to Ko Samui?

Currently, September is the cheapest month in which you can book a flight from California to Ko Samui (average of $686). Flying from California to Ko Samui in June is currently the most expensive (average of $1,386). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 November 17, 2025.

When flying from California to Ko Samui, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 22% versus a flight in the evening.

What is the cheapest day to fly from California to Ko Samui?

Use this chart to determine the cheapest time to fly round-trip from California to Ko Samui. Price data was last updated on March 30, 2025.

Travelers seeking maximum savings on their California to Ko Samui flight should consider departing on Thursday at noon when fares are most often at their lowest. Friday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 30h 25m. The distance between California and Ko Samui is about 8508 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 Los Angeles - Ko Samui, San Francisco - Ko Samui or Las Vegas Harry Reid Intl - 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.

  • What is the cheapest month to book a flight from California to Ko Samui?

    Currently, September is the cheapest month in which you can book a flight from California to Ko Samui (average of $686). Flying from California to Ko Samui in June is currently the most expensive (average of $1,386). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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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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 November 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$756Average$1,121FlexibilityNo cancel feeOn-time81%
EVA AirCheapest$1,001Average$1,172FlexibilityNo cancel feeOn-time74%

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