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Ko Samui

$461+ Cheap flights from Riverside, CA 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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — USM
Feb 27 — Mar 61
Fri 2/27
Fri 3/6
1 adult, Economy
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Cheap flight deals from Riverside to Ko Samui

Cheapest flights from Riverside to Ko Samui
Explore the most affordable flight options available from Riverside to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 28, 2026.

This FlightHub deal was found by Cheapflights users on 1/27. 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 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 1/27$706
This FlightHub deal was found by Cheapflights users on 1/26. 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 4/1611:30 pm
LAX
-
USM
1 stop29h 20m
Singapore Airlines
Thu 4/308:40 am
USM
-
LAX
1 stop26h 40m
Singapore Airlines
Deal found 1/26$848
This oojo deal was found by Cheapflights users on 1/26. 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 4/1112:35 am
LAX
-
USM
2 stops24h 35m
Multiple Airlines
Sun 4/1910:05 am
USM
-
LAX
2 stops25h 05m
Multiple Airlines
Deal found 1/26$876
This oojo deal was found by Cheapflights users on 1/26. 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 1/26$878
This Justfly.com deal was found by Cheapflights users on 1/26. 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 5/1911:30 pm
LAX
-
USM
1 stop27h 50m
Singapore Airlines
Wed 5/278:40 am
USM
-
LAX
1 stop24h 30m
Singapore Airlines
Deal found 1/26$888
This Justfly.com deal was found by Cheapflights users on 1/27. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/138:55 pm
LAX
-
USM
1 stop20h 50m
Singapore Airlines
Mon 6/18:40 am
USM
-
LAX
1 stop26h 40m
Singapore Airlines
Deal found 1/27$889

Find flight deals from Riverside to Ko Samui

Keep the following information in mind while searching for Riverside to Ko Samui flight deals. Data was last updated January 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$706
(FlightHub)

One-way from

$461
(Trip.com)

Popular in

June

Cheapest in

September

Average price

$997
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 Riverside to Ko Samui
Search Deals
One-way flight from Riverside to Ko Samui
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($234 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Riverside 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 28, 2026.
Use the filters below to find and compare flights from Riverside to Ko Samui that are best for you.

Fly from

Riverside

Fly to

Ko Samui

Route

Depart

Return

Price

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Mon 5/11

2:20 pm-7:45 am

2 stops27h 25m

Ko Samui

Mon 6/8

8:40 am-9:20 pm

1 stop26h 40m

$740

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Thu 4/16

11:30 pm-6:50 pm

1 stop29h 20m

Ko Samui

Thu 4/30

8:40 am-9:20 pm

1 stop26h 40m

$848

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Tue 5/19

11:30 pm-5:20 pm

1 stop27h 50m

Ko Samui

Wed 5/27

6:15 pm-12:50 pm

2 stops32h 35m

$901

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Sun 3/8

11:50 pm-3:35 pm

2 stops25h 45m

Ko Samui

Wed 3/18

2:30 pm-8:00 pm

2 stops19h 30m

$916

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Tue 3/3

10:50 pm-3:35 pm

2 stops25h 45m

Ko Samui

Tue 3/31

10:05 am-9:10 pm

2 stops25h 05m

$933

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Sun 2/15

10:30 pm-7:50 am

2 stops42h 20m

$526

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Fri 2/27

10:50 am-7:45 am

2 stops29h 55m

$557

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Sun 2/15

7:50 pm-8:00 am

1 stop21h 10m

$566

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Fri 2/27

10:40 am-8:10 am

2 stops30h 30m

$630

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Tue 3/3

11:00 pm-7:50 am

3 stops41h 50m

$684

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

Best time to book a flight from Riverside to Ko Samui

Have a flexible travel schedule? Discover the best time to fly to Ko Samui from Riverside 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 Riverside to Ko Samui

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

Currently, September is the cheapest month in which you can book a flight from Riverside to Ko Samui (average of $686). Flying from Riverside to Ko Samui in February is currently the most expensive (average of $1,193). 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 R1V to USM?

Find hourly flight availability from Riverside 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 28, 2026.

It’s typically best to fly out from Riverside to Ko Samui in the afternoon. Doing so could potentially save you 29% on the flight price compared to flying at noon, which is usually more expensive.

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

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

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

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 January 28, 2026.
Peruse reviews from past customers who have flown with EVA Air and Singapore Airlines from Riverside to Ko Samui to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very good
1,334 reviews

Boarding

8.4

Food

8.1

Overall

8.4

Comfort

8.3

Crew

8.6

Entertainment

8.0

Reviews

1 / 20
6.0
Good

Hannah,Jan 2026

TPE - SFO

I like the flight attendants the most. The are very helpful.
EVA Air
8.4
Very good
1,334 reviews
EVA Air
8.4
Very good
1,334 reviews

Boarding

8.4

Food

8.1

Overall

8.4

Comfort

8.3

Crew

8.6

Entertainment

8.0

Reviews

1 / 20
6.0
Good

Hannah,Jan 2026

TPE - SFO

I like the flight attendants the most. The are very helpful.
Singapore Airlines
8.2
Very good
1,439 reviews
EVA Air
8.4
Very good
1,334 reviews

Boarding

8.4

Food

8.1

Overall

8.4

Comfort

8.3

Crew

8.6

Entertainment

8.0

Reviews

1 / 20
6.0
Good

Hannah,Jan 2026

TPE - SFO

I like the flight attendants the most. The are very helpful.

Related info for your journey

Find useful and relevant information for your journey from Riverside 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 Riverside?

    Ko Samui (USM) is the airport you will fly into if you book a flight from Riverside to Ko Samui. You should not have trouble finding flights to Ko Samui from Riverside; the airport handles an average of 0 inbound flights from Riverside per day. You should also have plenty of airline options to choose from since 2 airlines have flights to the Ko Samui airport from Riverside. It is only a 2.1 mi journey from Ko Samui (USM) to Ko Samui’s city center.

  • How long is the flight from Riverside to Ko Samui?

    A quick flight from Riverside to Ko Samui can take about 27h 25m. Singapore Airlines provides one of the quickest options available for as low as $740. The distance between Riverside and Ko Samui is about 8508 mi.

  • Can I find deals for flights from Riverside to Ko Samui that include hotel bookings?

    Yes. In addition to deals on Riverside to Ko Samui flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Riverside to Ko Samui?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Riverside to Ko Samui.

  • Can I find deals for business class flights from Riverside to Ko Samui?

    Yes. Cheapflights offers flight deals from Riverside 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 Riverside to Ko Samui?

    Currently, September is the cheapest month in which you can book a flight from Riverside to Ko Samui (average of $686). Flying from Riverside to Ko Samui in February is currently the most expensive (average of $1,193). 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

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Top 2 airlines flying from Riverside to Ko Samui

Discover the top 2 airlines that operate flights from Riverside 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 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$756Average$1,035FlexibilityNo cancel feeOn-time81%
EVA AirCheapest$967Average$1,235FlexibilityNo cancel feeOn-time74%

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