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Ko Samui

$542+ 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 8/15. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — USM
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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Cheap 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 July 3, 2025.

Round-trip from

$737
(FlightHub)

One-way from

$542
(SmartFares)

Popular in

July

Cheapest in

April

Average price

$1,528
From Riverside to Ko Samui
Search Deals
One-way flight from Riverside to Ko Samui
Search Deals
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).
Search Deals
Average for round-trip flights in July 2025
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Find 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 July 3, 2025.

This FlightHub deal was found by Cheapflights users on 7/3. 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.
Fri 9/511:40 pmLAX - USM
1 stop27h 25mSingapore Airlines
Mon 9/158:45 amUSM - LAX
1 stop27h 05mSingapore Airlines
Deal found 7/3$737
This Expedia deal was found by Cheapflights users on 7/3. 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.
Sun 9/72:15 pmLAX - USM
2 stops28h 00mMultiple Airlines
Mon 9/159:00 pmUSM - LAX
2 stops28h 30mMultiple Airlines
Deal found 7/3$953
This Japan Airlines deal was found by Cheapflights users on 7/2. 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.
Sat 9/201:15 amLAX - USM
2 stops26h 30mJapan Airlines
Wed 9/247:10 pmUSM - LAX
2 stops31h 25mJapan Airlines
Deal found 7/2$1,027
This FlightHub deal was found by Cheapflights users on 7/2. 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 8/311:25 amLAX - USM
2 stops23h 20mEVA Air
Mon 9/88:00 amUSM - LAX
2 stops22h 40mEVA Air
Deal found 7/2$1,068

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 July 3, 2025.
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 9/1

11:40 pm-6:30 pm

1 stop28h 50m

Ko Samui

Mon 9/8

8:45 am-9:50 pm

1 stop27h 05m

$778

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Sat 9/20

1:15 am-5:45 pm

2 stops26h 30m

Ko Samui

Wed 9/24

7:10 pm-12:35 pm

2 stops31h 25m

$1,027

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Fri 9/26

4:25 pm-7:20 am

2 stops24h 55m

Ko Samui

Sat 10/11

8:00 am-8:45 pm

2 stops26h 45m

$1,063

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Sun 8/31

1:25 am-2:45 pm

2 stops23h 20m

Ko Samui

Mon 9/8

8:00 am-4:40 pm

2 stops22h 40m

$1,068

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Sun 8/31

1:25 am-6:35 pm

1 stop27h 10m

Ko Samui

Mon 9/8

10:55 am-10:35 pm

1 stop25h 40m

$1,399

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Fri 8/15

4:55 pm-7:15 am

2 stops24h 20m

$542

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Fri 8/15

11:40 pm-4:45 pm

1 stop27h 05m

$624

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Mon 8/11

1:25 am-8:30 pm

2 stops29h 05m

$705

Los AngelesKo Samui

LAX - USM

LAXUSM

Los Angeles

Mon 8/11

12:25 am-6:35 pm

1 stop28h 10m

$1,099

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

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 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 July 3, 2025.

When flying from Riverside to Ko Samui, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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. Wednesday afternoons 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 July 3, 2025.
Peruse reviews from past customers who have flown with EVA Air, Japan Airlines, 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
1,215 reviews

Overall

8.4

Comfort

8.3

Food

8.1

Crew

8.6

Boarding

8.4

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

TPE - SEA

The flight and crew were exceptional as always when I fly with EVA.
EVA Air
8.4
Very good
1,215 reviews
EVA Air
8.4
Very good
1,215 reviews

Overall

8.4

Comfort

8.3

Food

8.1

Crew

8.6

Boarding

8.4

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

TPE - SEA

The flight and crew were exceptional as always when I fly with EVA.
Japan Airlines
8.3
Very good
1,505 reviews
EVA Air
8.4
Very good
1,215 reviews

Overall

8.4

Comfort

8.3

Food

8.1

Crew

8.6

Boarding

8.4

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

TPE - SEA

The flight and crew were exceptional as always when I fly with EVA.
Singapore Airlines
8.1
Very good
1,320 reviews
EVA Air
8.4
Very good
1,215 reviews

Overall

8.4

Comfort

8.3

Food

8.1

Crew

8.6

Boarding

8.4

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

TPE - SEA

The flight and crew were exceptional as always when I fly with EVA.
Cathay Pacific
7.6
Good
921 reviews
EVA Air
8.4
Very good
1,215 reviews

Overall

8.4

Comfort

8.3

Food

8.1

Crew

8.6

Boarding

8.4

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

TPE - SEA

The flight and crew were exceptional as always when I fly with EVA.

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.

  • What are the cheapest airlines to fly from Riverside to Ko Samui one-way?

    The cheapest airlines for a one-way flight from Riverside to Ko Samui are Singapore Airlines ($624), EVA Air ($705), and Cathay Pacific ($1,099).

  • 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.

See more FAQs

Traveling to a place near Riverside?

Book flights to Riverside 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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$775Average$1,237FlexibilityNo cancel feeOn-time81%
EVA AirCheapest$1,071Average$1,181FlexibilityNo cancel feeOn-time74%

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