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Ko Samui

$440+ 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 9/17. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — USM
Jul 5 — Jul 121
Sat 7/5
Sat 7/12
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 June 30, 2025.

Round-trip from

$751
(FlightHub)

One-way from

$440
(KAYAK)

Popular in

July

Cheapest in

April

Average price

$1,518
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. 12% potential increase in price ($178 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 30, 2025.

This FlightHub deal was found by Cheapflights users on 6/29. 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 11/1110:05 pmLAX - USM
1 stop29h 25mSingapore Airlines
Thu 11/207:25 pmUSM - LAX
1 stop37h 35mSingapore Airlines
Deal found 6/29$730
This FlightHub deal was found by Cheapflights users on 6/28. 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 stop30h 20mSingapore Airlines
Tue 11/117:25 pmUSM - SFO
1 stop27h 25mSingapore Airlines
Deal found 6/28$752
This Trip.com deal was found by Cheapflights users on 6/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/710:55 pmSFO - USM
1 stop29h 20mMultiple Airlines
Sun 7/201:30 pmUSM - SFO
1 stop33h 50mMultiple Airlines
Deal found 6/30$790
This FlightHub deal was found by Cheapflights users on 6/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/151:35 pmLAX - USM
2 stops28h 40mJapan Airlines
Wed 9/247:10 pmUSM - LAX
2 stops31h 25mJapan Airlines
Deal found 6/30$839
This Expedia deal was found by Cheapflights users on 6/30. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/168:00 amSAN - USM
2 stops23h 10mMultiple Airlines
Sun 7/204:25 pmUSM - SAN
2 stops36h 41mMultiple Airlines
Deal found 6/30$875
This Trip.com deal was found by Cheapflights users on 6/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2812:50 pmLAX - USM
2 stops28h 30mMultiple Airlines
Wed 9/108:00 amUSM - LAX
2 stops26h 40mMultiple Airlines
Deal found 6/29$952
This FlightHub deal was found by Cheapflights users on 6/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/812:45 amSFO - USM
2 stops29h 45mEVA Air
Sun 10/269:10 pmUSM - SFO
2 stops32h 50mEVA Air
Deal found 6/30$1,011
This FlightHub deal was found by Cheapflights users on 6/28. 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 8/3112:50 amLAX - USM
2 stops22h 55mEVA Air
Mon 9/89:15 amUSM - LAX
2 stops21h 25mEVA Air
Deal found 6/28$1,068
This FlightHub deal was found by Cheapflights users on 6/29. 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.
Thu 10/24:50 pmLAS - USM
2 stops30h 20mMultiple Airlines
Tue 10/288:20 pmUSM - LAS
2 stops33h 39mMultiple Airlines
Deal found 6/29$1,176
This China Airlines deal was found by Cheapflights users on 6/29. 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 China Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/41:05 amSFO - USM
2 stops29h 25mChina Airlines
Fri 9/128:00 amUSM - SFO
2 stops26h 30mChina Airlines
Deal found 6/29$1,278
This Japan Airlines deal was found by Cheapflights users on 6/29. 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 Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/181:35 pmSAN - USM
2 stops28h 40mJapan Airlines
Mon 9/227:00 amUSM - SAN
2 stops42h 35mJapan Airlines
Deal found 6/29$1,453
This Cathay Pacific deal was found by Cheapflights users on 6/29. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/187:39 pmLAS - USM
2 stops32h 56mCathay Pacific
Mon 9/2210:55 amUSM - LAS
2 stops23h 04mCathay Pacific
Deal found 6/29$1,498

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 June 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

Mon 9/15

11:40 pm-6:30 pm

1 stop28h 50m

Ko Samui

Wed 9/24

12:05 pm-7:05 pm

1 stop21h 00m

$751

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Mon 7/7

10:55 pm-6:15 pm

1 stop29h 20m

Ko Samui

Sun 7/20

1:30 pm-9:20 am

1 stop33h 50m

$790

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Wed 8/27

11:30 am-7:50 am

1 stop30h 20m

Ko Samui

Thu 9/4

12:05 pm-9:40 am

1 stop35h 35m

$824

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Mon 9/15

1:35 pm-8:15 am

2 stops28h 40m

Ko Samui

Wed 9/24

7:10 pm-12:35 pm

2 stops31h 25m

$839

San DiegoKo Samui

SAN - USM

SANUSM

San Diego

Wed 7/16

8:00 am-9:10 pm

2 stops23h 10m

Ko Samui

Sun 7/20

4:25 pm-3:06 pm

2 stops36h 41m

$875

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Thu 8/28

12:50 pm-7:20 am

2 stops28h 30m

Ko Samui

Wed 9/10

8:00 am-8:40 pm

2 stops26h 40m

$952

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Tue 8/26

1:25 am-2:45 pm

2 stops23h 20m

Ko Samui

Wed 9/3

2:00 pm-8:00 pm

2 stops20h 00m

$1,011

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Sun 8/31

1:25 am-1:45 pm

2 stops22h 20m

Ko Samui

Mon 9/8

9:15 am-4:40 pm

2 stops21h 25m

$1,068

Las VegasKo Samui

LAS - USM

LASUSM

Las Vegas Harry Reid Intl

Thu 10/2

4:50 pm-1:10 pm

2 stops30h 20m

Ko Samui

Tue 10/28

8:20 pm-3:59 pm

2 stops33h 39m

$1,176

San FranciscoKo Samui

SFO - USM

SFOUSM

San Francisco

Thu 9/4

1:05 am-8:30 pm

2 stops29h 25m

Ko Samui

Sat 9/13

2:35 pm-8:30 pm

2 stops19h 55m

$1,278

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/28

Showing 1-10 of 29 results
1
2
3

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 June 30, 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.

Reviews of airlines servicing Ko Samui

Get insights into the airlines that provide service to Ko Samui. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ko Samui. Reviews last updated June 30, 2025.
Read reviews from past customers who have flown EVA Air, Japan Airlines, and China Airlines from California to Ko Samui. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very good
1,210 reviews

Overall

8.4

Food

8.1

Comfort

8.3

Entertainment

8.0

Boarding

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
EVA Air
8.4
Very good
1,210 reviews
EVA Air
8.4
Very good
1,210 reviews

Overall

8.4

Food

8.1

Comfort

8.3

Entertainment

8.0

Boarding

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Japan Airlines
8.3
Very good
1,504 reviews
EVA Air
8.4
Very good
1,210 reviews

Overall

8.4

Food

8.1

Comfort

8.3

Entertainment

8.0

Boarding

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
China Airlines
8.3
Very good
745 reviews
EVA Air
8.4
Very good
1,210 reviews

Overall

8.4

Food

8.1

Comfort

8.3

Entertainment

8.0

Boarding

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Singapore Airlines
8.1
Very good
1,319 reviews
EVA Air
8.4
Very good
1,210 reviews

Overall

8.4

Food

8.1

Comfort

8.3

Entertainment

8.0

Boarding

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Cathay Pacific
7.6
Good
921 reviews
EVA Air
8.4
Very good
1,210 reviews

Overall

8.4

Food

8.1

Comfort

8.3

Entertainment

8.0

Boarding

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

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.

  • 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 Japan Airlines ($440), Singapore Airlines ($467), and EVA Air ($666).

  • 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.

See more FAQs

Traveling to a place near California?

Book flights to California if you plan to visit one of these locations
Ko Tao
Ko Pha Ngan

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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 June 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$775Average$1,205FlexibilityNo cancel feeOn-time81%
EVA AirCheapest$1,048Average$1,156FlexibilityNo cancel feeOn-time74%

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