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Ko Samui

$492+ 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 1/20. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — USM
Feb 13 — Feb 201
Fri 2/13
Fri 2/20
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 January 14, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$763
(FlightHub)

One-way from

$492
(oojo)

Popular in

February

Cheapest in

September

Average price

$997
Provider with most accurate pricing for Los Angeles-Ko Samui flight deals.
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Provider most trusted by Cheapflights users for Los Angeles-Ko Samui flights.
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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. 2% potential increase in price ($32 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($38 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 January 14, 2026.

This FlightHub deal was found by Cheapflights users on 1/12. 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.
Mon 5/1111:30 pm
LAX
-
USM
1 stop27h 50m
Singapore Airlines
Mon 6/88:40 am
USM
-
LAX
1 stop26h 40m
Singapore Airlines
Deal found 1/12$763
This FlightHub deal was found by Cheapflights users on 1/12. 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.
Thu 10/222:20 pm
LAX
-
USM
2 stops27h 25m
Singapore Airlines
Sun 11/18:55 am
USM
-
LAX
1 stop26h 00m
Singapore Airlines
Deal found 1/12$776
This Justfly.com deal was found by Cheapflights users on 1/11. 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 8/2612:15 am
LAX
-
USM
1 stop27h 05m
Singapore Airlines
Sun 9/67:45 pm
USM
-
LAX
1 stop40h 05m
Singapore Airlines
Deal found 1/11$806
This Justfly.com deal was found by Cheapflights users on 1/12. 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 3/88:50 pm
LAX
-
USM
1 stop21h 10m
Singapore Airlines
Tue 3/178:55 am
USM
-
LAX
1 stop26h 00m
Singapore Airlines
Deal found 1/12$814
This FlightHub deal was found by Cheapflights users on 1/12. 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.
Mon 3/212:25 pm
LAX
-
USM
2 stops37h 45m
Singapore Airlines
Fri 3/138:55 am
USM
-
LAX
1 stop24h 15m
Singapore Airlines
Deal found 1/12$867
This Justfly.com deal was found by Cheapflights users on 1/12. 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 4/2611:00 am
SFO
-
USM
1 stop41h 50m
Singapore Airlines
Sun 5/108:40 am
USM
-
SFO
1 stop38h 30m
Singapore Airlines
Deal found 1/12$869
This oojo deal was found by Cheapflights users on 1/12. 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.
Wed 4/1512:35 am
LAX
-
USM
2 stops30h 15m
Multiple Airlines
Thu 4/302:35 pm
USM
-
LAX
2 stops20h 35m
Multiple Airlines
Deal found 1/12$878
This oojo deal was found by Cheapflights users on 1/12. 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 4/1112:50 am
SFO
-
USM
2 stops23h 55m
Multiple Airlines
Thu 4/3010:05 am
USM
-
SFO
2 stops24h 25m
Multiple Airlines
Deal found 1/12$878
This Trip.com deal was found by Cheapflights users on 1/12. 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 10/2310:10 am
LAX
-
USM
2 stops31h 00m
Multiple Airlines
Sun 11/18:20 pm
USM
-
LAX
2 stops25h 30m
Multiple Airlines
Deal found 1/12$879
This FlightHub deal was found by Cheapflights users on 1/13. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/1611:40 pm
LAX
-
USM
1 stop42h 05m
Singapore Airlines
Thu 4/308:40 am
USM
-
LAX
1 stop26h 40m
Singapore Airlines
Deal found 1/13$891
This oojo deal was found by Cheapflights users on 1/12. 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.
Wed 4/1512:50 am
SFO
-
USM
2 stops23h 55m
Multiple Airlines
Sun 4/262:00 pm
USM
-
SFO
2 stops20h 30m
Multiple Airlines
Deal found 1/12$897
This oojo deal was found by Cheapflights users on 1/12. 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 3/311:10 pm
SFO
-
USM
2 stops25h 25m
Multiple Airlines
Tue 3/172:05 pm
USM
-
SFO
2 stops19h 55m
Multiple Airlines
Deal found 1/12$916

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 January 14, 2026.
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

Mon 3/2

12:25 pm-5:10 pm

2 stops37h 45m

Ko Samui

Fri 3/13

8:55 am-7:10 pm

1 stop24h 15m

$867

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Sat 4/11

12:50 am-2:45 pm

2 stops23h 55m

Ko Samui

Thu 4/30

10:05 am-8:30 pm

2 stops24h 25m

$878

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Thu 4/16

11:40 pm-7:45 am

1 stop42h 05m

Ko Samui

Thu 4/30

8:40 am-9:20 pm

1 stop26h 40m

$891

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Wed 4/22

8:55 pm-6:50 pm

1 stop31h 55m

Ko Samui

Tue 4/28

11:05 am-9:20 pm

1 stop24h 15m

$891

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Sun 3/1

7:50 pm-8:00 am

1 stop21h 10m

Ko Samui

Thu 3/12

8:55 am-8:55 pm

1 stop26h 00m

$896

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Wed 3/4

11:10 pm-3:35 pm

2 stops25h 25m

Ko Samui

Wed 3/11

2:05 pm-8:00 pm

2 stops19h 55m

$916

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Tue 3/3

11:10 pm-3:35 pm

2 stops25h 25m

Ko Samui

Tue 3/17

2:05 pm-8:00 pm

2 stops19h 55m

$916

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Thu 3/26

12:00 pm-7:45 am

2 stops29h 45m

Ko Samui

Thu 4/2

2:00 pm-8:00 pm

2 stops20h 00m

$978

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Sun 4/12

11:00 am-7:45 am

1 stop30h 45m

Ko Samui

Thu 4/30

11:05 am-9:10 am

1 stop36h 05m

$978

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Tue 2/3

11:10 pm-4:40 pm

2 stops26h 30m

Ko Samui

Tue 2/10

12:20 pm-7:00 pm

2 stops21h 40m

$1,030

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/12

Showing 1-10 of 34 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 $1,109). 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 January 14, 2026.

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 evening, which can drop the price by up to 14% versus a flight at noon.

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.

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 29h 45m. 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 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 $1,109). 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

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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 January 14, 2026.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$756Average$1,226FlexibilityNo cancel feeOn-time81%
EVA AirCheapest$1,001Average$1,166FlexibilityNo cancel feeOn-time74%

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