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Ko Samui

$381+ 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 1/14. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — USM
Jan 29 — Feb 51
Thu 1/29
Thu 2/5
1 adult, Economy
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Cheap flight deals from California to Ko Samui

Best flights from California to Ko Samui
Discover carefully curated flight deals from California to Ko Samui that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 30, 2025.

This Justfly.com deal was found by Cheapflights users on 12/28. 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.
Tue 3/310:05 pmLAX - USM
1 stop29h 45mSingapore Airlines
Tue 3/318:40 amUSM - LAX
1 stop27h 10mSingapore Airlines
Deal found 12/28$813
This FlightHub deal was found by Cheapflights users on 12/29. 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 3/311:00 pmLAX - USM
2 stops26h 25mEVA Air
Tue 3/312:00 pmUSM - LAX
2 stops20h 55mEVA Air
Deal found 12/29$954
This CheapOair deal was found by Cheapflights users on 12/29. 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.
Fri 1/161:20 pmLAX - USM
2 stops27h 15mMultiple Airlines
Sun 1/258:40 pmUSM - LAX
2 stops31h 44mMultiple Airlines
Deal found 12/29$963
This Qatar Airways deal was found by Cheapflights users on 12/29. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/283:00 pmSFO - USM
2 stops33h 10mQatar Airways
Sun 3/811:40 amUSM - SFO
2 stops40h 00mQatar Airways
Deal found 12/29$1,582
This oojo deal was found by Cheapflights users on 12/29. 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 3/75:50 pmLAS - USM
3 stops36h 30mCathay Pacific
Sun 3/1511:40 amUSM - LAS
2 stops23h 20mCathay Pacific
Deal found 12/29$1,643
This FlightHub deal was found by Cheapflights users on 12/27. 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.
Mon 3/212:25 pmLAX - USM
2 stops37h 45mSingapore Airlines
Fri 3/138:55 amUSM - LAX
1 stop24h 15mSingapore Airlines
Deal found 12/27$908
This FlightHub deal was found by Cheapflights users on 12/28. 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 1/1411:30 pmSFO - USM
2 stops26h 20mEVA Air
Wed 1/217:15 amUSM - SFO
2 stops22h 35mEVA Air
Deal found 12/28$964
This FlightHub deal was found by Cheapflights users on 12/29. 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 1/1910:05 pmLAX - USM
1 stop28h 05mSingapore Airlines
Thu 2/267:45 pmUSM - LAX
2 stops30h 10mSingapore Airlines
Deal found 12/29$908
This oojo deal was found by Cheapflights users on 12/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/2612:00 pmSFO - USM
2 stops29h 45mEVA Air
Thu 4/27:50 amUSM - SFO
2 stops22h 10mEVA Air
Deal found 12/28$977
This FlightHub deal was found by Cheapflights users on 12/28. 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.
Thu 4/94:45 pmLAS - USM
2 stops30h 25mMultiple Airlines
Tue 4/216:55 pmUSM - LAS
2 stops35h 03mMultiple Airlines
Deal found 12/28$1,081
This British Airways deal was found by Cheapflights users on 12/27. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/64:45 pmSAN - USM
2 stops59h 30mBritish Airways
Sun 5/104:25 pmUSM - SAN
2 stops36h 30mBritish Airways
Deal found 12/27$2,168
This Justfly.com deal was found by Cheapflights users on 12/29. 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.
Mon 1/1910:05 pmLAX - USM
1 stop28h 05mSingapore Airlines
Wed 1/287:45 pmUSM - LAX
2 stops30h 10mSingapore Airlines
Deal found 12/29$949
This FlightHub deal was found by Cheapflights users on 12/28. 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 1/79:40 amSFO - USM
1 stop31h 20mSingapore Airlines
Wed 1/287:45 pmUSM - SFO
1 stop27h 05mSingapore Airlines
Deal found 12/28$978
This Ovago deal was found by Cheapflights users on 12/30. 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.
Fri 4/106:40 pmLAS - USM
3 stops30h 05mMultiple Airlines
Tue 4/216:25 pmUSM - LAS
3 stops64h 33mMultiple Airlines
Deal found 12/30$1,273
This Justfly.com deal was found by Cheapflights users on 12/29. 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.
Mon 2/1610:05 pmLAX - USM
1 stop28h 05mSingapore Airlines
Sat 2/287:45 pmUSM - LAX
2 stops30h 10mSingapore Airlines
Deal found 12/29$1,011
This Orbitz deal was found by Cheapflights users on 12/27. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/106:05 pmSAN - USM
2 stops27h 40mMultiple Airlines
Sun 1/257:35 pmUSM - SAN
2 stops31h 28mMultiple Airlines
Deal found 12/27$1,316
This Qatar Airways deal was found by Cheapflights users on 12/28. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/293:55 pmSFO - USM
2 stops37h 45mQatar Airways
Sat 4/1111:55 amUSM - SFO
2 stops39h 40mQatar Airways
Deal found 12/28$1,611
This KAYAK deal was found by Cheapflights users on 12/30. 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.
Wed 4/89:43 pmLAS - USM
3 stops43h 52mMultiple Airlines
Mon 4/208:50 pmUSM - LAS
3 stops30h 23mMultiple Airlines
Deal found 12/30$1,321
This Singapore Airlines deal was found by Cheapflights users on 12/28. 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 Singapore Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/1610:40 amSFO - USM
1 stop40h 30mSingapore Airlines
Wed 3/187:45 pmUSM - SFO
1 stop27h 05mSingapore Airlines
Deal found 12/28$1,359
This Kiwi.com deal was found by Cheapflights users on 12/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/273:25 pmSFO - USM
3 stops30h 15mMultiple Airlines
Sat 4/1111:55 amUSM - SFO
1 stop24h 45mMultiple Airlines
Deal found 12/28$1,547
This flugladen.de deal was found by Cheapflights users on 12/28. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/2810:40 amSFO - USM
1 stop41h 35mMultiple Airlines
Sat 4/118:20 amUSM - SFO
1 stop39h 20mMultiple Airlines
Deal found 12/28$1,585
This oojo deal was found by Cheapflights users on 12/30. 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 4/88:00 amLAS - USM
2 stops47h 10mSingapore Airlines
Mon 4/201:30 pmUSM - LAS
2 stops37h 43mSingapore Airlines
Deal found 12/30$1,491
This Kiwi.com deal was found by Cheapflights users on 12/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/2911:30 pmSFO - USM
2 stops25h 40mMultiple Airlines
Sat 4/1111:55 amUSM - SFO
1 stop24h 45mMultiple Airlines
Deal found 12/28$1,610
This Qatar Airways deal was found by Cheapflights users on 12/27. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/109:11 amSAN - USM
3 stops34h 24mQatar Airways
Sun 1/259:20 pmUSM - SAN
3 stops35h 00mQatar Airways
Deal found 12/27$2,597
This Kiwi.com deal was found by Cheapflights users on 12/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/2712:00 pmSFO - USM
2 stops29h 10mMultiple Airlines
Sun 4/1211:55 amUSM - SFO
1 stop24h 45mMultiple Airlines
Deal found 12/28$1,616
This Kiwi.com deal was found by Cheapflights users on 12/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/283:25 pmSFO - USM
3 stops29h 20mMultiple Airlines
Fri 4/1011:55 amUSM - SFO
1 stop24h 45mMultiple Airlines
Deal found 12/28$1,629

Find 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 December 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$805
(Justfly.com)

One-way from

$381
(Expedia)

Popular in

February

Cheapest in

September

Average price

$1,261
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. 5% potential increase in price ($69 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 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 December 30, 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

Tue 3/3

10:05 pm-6:50 pm

1 stop29h 45m

Ko Samui

Tue 3/31

8:40 am-9:50 pm

1 stop27h 10m

$813

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

$908

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Mon 1/19

10:05 pm-5:10 pm

1 stop28h 05m

Ko Samui

Thu 2/26

7:45 pm-10:55 am

2 stops30h 10m

$908

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Mon 1/19

10:05 pm-5:10 pm

1 stop28h 05m

Ko Samui

Wed 1/28

7:45 pm-10:55 am

2 stops30h 10m

$949

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Tue 3/3

11:00 pm-4:25 pm

2 stops26h 25m

Ko Samui

Tue 3/31

2:00 pm-8:55 pm

2 stops20h 55m

$954

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Fri 1/16

1:20 pm-7:35 am

2 stops27h 15m

Ko Samui

Sun 1/25

8:40 pm-1:24 pm

2 stops31h 44m

$963

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Wed 1/14

11:30 pm-4:50 pm

2 stops26h 20m

Ko Samui

Wed 1/21

7:15 am-2:50 pm

2 stops22h 35m

$964

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

7:50 am-4:00 pm

2 stops22h 10m

$977

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Wed 1/7

9:40 am-8:00 am

1 stop31h 20m

Ko Samui

Wed 1/28

7:45 pm-7:50 am

1 stop27h 05m

$978

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Mon 2/16

10:05 pm-5:10 pm

1 stop28h 05m

Ko Samui

Sat 2/28

7:45 pm-10:55 am

2 stops30h 10m

$1,011

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/28

Showing 1-10 of 42 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 December 30, 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 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.

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 26h 20m. 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 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

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 December 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$756Average$1,082FlexibilityNo cancel feeOn-time81%
EVA AirCheapest$1,001Average$1,166FlexibilityNo cancel feeOn-time74%

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