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Ko Samui

$1,696+ 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 9/17. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — USM
May 29 — Jun 51
Fri 5/29
Fri 6/5
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 April 29, 2026.

This Japan Airlines deal was found by Cheapflights users on 4/23. 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 9/171:35 pm
SAN
-
USM
2 stops29h 45m
Japan Airlines
Mon 9/219:00 pm
USM
-
SAN
2 stops28h 35m
Japan Airlines
Deal found 4/23$1,696
This Cathay Pacific deal was found by Cheapflights users on 4/26. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/174:28 pm
SAN
-
USM
2 stops37h 12m
Cathay Pacific
Mon 9/2111:55 am
USM
-
SAN
2 stops48h 38m
Cathay Pacific
Deal found 4/26$1,774
This BusinessClass deal was found by Cheapflights users on 4/25. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/101:30 pm
SAN
-
USM
3 stops51h 40m
Multiple Airlines
Wed 6/179:00 pm
USM
-
SAN
3 stops29h 19m
Multiple Airlines
Deal found 4/25$1,857
This Travelocity deal was found by Cheapflights users on 4/25. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/254:55 pm
SAN
-
USM
2 stops36h 45m
Multiple Airlines
Mon 6/111:55 am
USM
-
SAN
2 stops38h 19m
Multiple Airlines
Deal found 4/25$1,910

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 April 29, 2026.

Round-trip from

$1,774
(Cathay Pacific)
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 April 29, 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

Wed 6/10

1:30 pm-7:10 am

3 stops51h 40m

Ko Samui

Wed 6/17

9:00 pm-12:19 pm

3 stops29h 19m

$1,857
Quickest round-trip

San DiegoKo Samui

SAN - USM

SANUSM

San Diego

Mon 5/25

4:55 pm-7:40 pm

2 stops36h 45m

Ko Samui

Mon 6/1

11:55 am-12:14 pm

2 stops38h 19m

$1,910

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/25

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 16% of weekly flights between San Diego and Ko Samui have experienced delays in the past year, with the average delay time being 167 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 morning 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 13% 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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