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Ko Samui

$1,310+ Cheap flights from San Diego (SAN) to Ko Samui (USM)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — USM
Jun 30 — Jul 71
Tue 6/30
Tue 7/7
1 adult, Economy
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Cheap flight deals from San Diego to Ko Samui

Cheapest flights from San Diego to Ko Samui
Explore the most affordable flight options available from San Diego to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 31, 2026.

This IEagle deal was found by Cheapflights users on 5/28. 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 IEagle is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/109:05 am
SAN
-
USM
3 stops32h 05m
Multiple Airlines
Thu 9/178:35 pm
USM
-
SAN
3 stops28h 41m
Multiple Airlines
Deal found 5/28$1,310
This IEagle deal was found by Cheapflights users on 5/29. 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 IEagle is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/37:50 am
SAN
-
USM
3 stops33h 20m
Multiple Airlines
Thu 10/159:00 pm
USM
-
SAN
3 stops29h 21m
Multiple Airlines
Deal found 5/29$1,348
This Japan Airlines deal was found by Cheapflights users on 5/27. 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 Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/141:00 pm
SAN
-
USM
2 stops29h 35m
Japan Airlines
Sun 10/188:35 pm
USM
-
SAN
2 stops28h 30m
Japan Airlines
Deal found 5/27$1,814
This Booking.com deal was found by Cheapflights users on 5/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/286:15 am
SAN
-
USM
3 stops39h 00m
Multiple Airlines
Sun 7/58:35 pm
USM
-
SAN
3 stops32h 36m
Multiple Airlines
Deal found 5/29$2,030
This British Airways deal was found by Cheapflights users on 5/28. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/217:40 pm
SAN
-
USM
2 stops32h 35m
British Airways
Sun 10/254:25 pm
USM
-
SAN
2 stops38h 45m
British Airways
Deal found 5/28$2,168

Find flight deals from San Diego to Ko Samui

Discover tips and strategies to find the most affordable flight options for your journey from San Diego (SAN) to Ko Samui (USM). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 31, 2026.

Round-trip from

$2,030
(Booking.com)
From San Diego to Ko Samui
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Diego 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 May 31, 2026.
Use the filters below to find and compare flights from San Diego to Ko Samui that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San DiegoKo Samui

SAN - USM

SANUSM

San Diego

Thu 9/10

9:05 am-7:10 am

3 stops32h 05m

Ko Samui

Thu 9/17

8:35 pm-11:16 am

3 stops28h 41m

$1,310

San DiegoKo Samui

SAN - USM

SANUSM

San Diego

Sat 10/3

7:50 am-7:10 am

3 stops33h 20m

Ko Samui

Thu 10/15

9:00 pm-12:21 pm

3 stops29h 21m

$1,348
Quickest round-trip

San DiegoKo Samui

SAN - USM

SANUSM

San Diego

Wed 10/14

1:00 pm-8:35 am

2 stops29h 35m

Ko Samui

Sun 10/18

8:35 pm-11:05 am

2 stops28h 30m

$1,814

San DiegoKo Samui

SAN - USM

SANUSM

San Diego

Wed 10/21

4:45 pm-6:15 pm

2 stops59h 30m

Ko Samui

Sun 10/25

1:25 pm-5:10 pm

2 stops41h 45m

$2,168

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/28

Sorted by cheapest first

Best time to book a flight from San Diego to Ko Samui

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

How often are flights from San Diego to Ko Samui delayed?

About 13% of weekly flights between San Diego and Ko Samui have experienced delays in the past year, with the average delay time being 159 minutes.

What is the most punctual flight time for San Diego to Ko Samui flights?

Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Saturday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on San Diego to Ko Samui flights?

Over the last year, Delta have had the lowest number of delays on this route, with just 8% of flights being delayed.

Related info for your journey

Find useful and relevant information for your journey from San Diego to Ko Samui. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from San Diego 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.

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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