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Ko Samui

$385+ 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 2/1. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — USM
Dec 22 — Dec 291
Mon 12/22
Mon 12/29
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 22, 2025.

This oojo deal was found by Cheapflights users on 11/19. 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 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 12/1510:00 amUSM - LAX
2 stops24h 25mMultiple Airlines
Deal found 11/19$1,218
This Cathay Pacific deal was found by Cheapflights users on 11/19. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2712:30 pmSAN - USM
2 stops40h 05mMultiple Airlines
Thu 12/1111:40 amUSM - SAN
2 stops26h 50mMultiple Airlines
Deal found 11/19$1,273
This Ovago deal was found by Cheapflights users on 11/19. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/275:00 pmSAN - USM
2 stops35h 35mCathay Pacific
Wed 12/1011:40 amUSM - SAN
2 stops24h 41mCathay Pacific
Deal found 11/19$1,282
This CheapOair deal was found by Cheapflights users on 11/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2010:50 amLAX - USM
2 stops32h 45mMultiple Airlines
Sat 11/229:10 pmUSM - LAX
2 stops29h 38mMultiple Airlines
Deal found 11/20$1,286
This KAYAK deal was found by Cheapflights users on 11/19. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/256:15 amSAN - USM
2 stops46h 20mCathay Pacific
Sun 12/1411:40 amUSM - SAN
2 stops48h 41mCathay Pacific
Deal found 11/19$1,306
This KAYAK deal was found by Cheapflights users on 11/19. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/246:15 amSAN - USM
2 stops46h 20mCathay Pacific
Wed 12/1011:40 amUSM - SAN
2 stops24h 41mCathay Pacific
Deal found 11/19$1,313
This Gurufare deal was found by Cheapflights users on 11/19. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/275:00 pmSAN - USM
2 stops35h 35mCathay Pacific
Fri 12/1211:40 amUSM - SAN
2 stops48h 41mCathay Pacific
Deal found 11/19$1,333
This KAYAK deal was found by Cheapflights users on 11/19. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/256:15 amSAN - USM
2 stops46h 20mCathay Pacific
Fri 12/1211:40 amUSM - SAN
2 stops48h 41mCathay Pacific
Deal found 11/19$1,356
This KAYAK deal was found by Cheapflights users on 11/19. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/246:15 amSAN - USM
2 stops46h 20mCathay Pacific
Fri 12/1211:40 amUSM - SAN
2 stops48h 41mCathay Pacific
Deal found 11/19$1,363
This KAYAK deal was found by Cheapflights users on 11/19. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/256:15 amSAN - USM
2 stops46h 20mCathay Pacific
Thu 12/1111:40 amUSM - SAN
2 stops24h 41mCathay Pacific
Deal found 11/19$1,448
This KAYAK deal was found by Cheapflights users on 11/19. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/246:15 amSAN - USM
2 stops46h 20mCathay Pacific
Thu 12/1111:40 amUSM - SAN
2 stops24h 41mCathay Pacific
Deal found 11/19$1,455
This oojo deal was found by Cheapflights users on 11/19. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/510:35 pmLAX - USM
2 stops25h 20mCathay Pacific
Mon 12/1511:40 amUSM - LAX
1 stop36h 35mCathay Pacific
Deal found 11/19$1,503

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 22, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$817
(Justfly.com)

One-way from

$385
(Gotogate)

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 22, 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

$953

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

$953

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Sat 5/9

12:50 am-4:35 pm

2 stops25h 45m

Ko Samui

Sun 5/31

8:50 pm-6:45 am

2 stops23h 55m

$975

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Sun 4/12

11:30 am-7:50 am

1 stop30h 20m

Ko Samui

Thu 4/30

12:05 pm-9:40 am

1 stop35h 35m

$977

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Wed 3/25

12:10 am-3:35 pm

2 stops25h 25m

Ko Samui

Thu 4/2

11:45 am-8:00 pm

2 stops22h 15m

$994

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Fri 2/6

7:50 pm-8:00 am

1 stop21h 10m

Ko Samui

Sat 2/14

8:55 am-7:55 pm

1 stop26h 00m

$1,093

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Fri 2/6

10:40 am-7:45 am

2 stops30h 05m

Ko Samui

Sat 2/14

8:30 pm-6:50 am

2 stops49h 20m

$1,116

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Fri 12/5

10:40 pm-12:35 pm

2 stops22h 55m

Ko Samui

Mon 12/15

1:45 pm-7:25 pm

2 stops20h 40m

$1,218

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Sat 1/3

10:35 pm-5:40 pm

2 stops28h 05m

Ko Samui

Thu 1/22

11:40 am-4:20 pm

1 stop19h 40m

$1,253

San DiegoKo Samui

SAN - USM

SANUSM

San Diego

Thu 11/27

12:30 pm-7:35 pm

2 stops40h 05m

Ko Samui

Thu 12/11

11:40 am-11:30 pm

2 stops26h 50m

$1,273

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/18

Showing 1-10 of 47 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 22, 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 05m. The distance between California and Ko Samui is about 8508 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 ($463), EVA Air ($562), and Japan Airlines ($796).

  • 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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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 November 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$756Average$1,121FlexibilityNo cancel feeOn-time81%
EVA AirCheapest$1,001Average$1,172FlexibilityNo cancel feeOn-time74%

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