$1,231+ 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 10/29. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — USM
Oct 31 — Nov 71
Round-trip
1 adult, Economy
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1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Cheapest
Best
Last-minute
Cheapest flights from San Diego to Ko SamuiExplore 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 October 1, 2026.
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 October 1, 2026.
This Cathay Pacific deal was found by Cheapflights users on 9/29. 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 10/297:50 am -
2 stops45h 45m
Mon 11/211:40 am -
2 stops42h 07m
Deal found 9/29![Cathay Pacific logo]()
$1,231
This Singapore Airlines deal was found by Cheapflights users on 9/26. 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 Singapore Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2911:40 am -
2 stops40h 35m
Mon 11/24:25 pm -
3 stops43h 00m
Deal found 9/26![Singapore Airlines logo]()
$3,325
Best flights from San Diego to Ko SamuiDiscover carefully curated flight deals from San Diego to Ko Samui that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 1, 2026.
Discover carefully curated flight deals from San Diego to Ko Samui that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 1, 2026.
This Cathay Pacific deal was found by Cheapflights users on 9/29. 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 10/297:50 am -
2 stops45h 45m
Mon 11/211:40 am -
2 stops42h 07m
Deal found 9/29![Cathay Pacific logo]()
$1,231
This Singapore Airlines deal was found by Cheapflights users on 9/26. 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 Singapore Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2911:40 am -
2 stops40h 35m
Mon 11/24:25 pm -
3 stops43h 00m
Deal found 9/26![Singapore Airlines logo]()
$3,325
Last-minute flights from San Diego to Ko SamuiDiscover last-minute flight deals from San Diego to Ko Samui. Data last updated October 1, 2026 and is based on user searches.
Discover last-minute flight deals from San Diego to Ko Samui. Data last updated October 1, 2026 and is based on user searches.
This Cathay Pacific deal was found by Cheapflights users on 9/29. 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 10/297:50 am -
2 stops45h 45m
Mon 11/211:40 am -
2 stops42h 07m
Deal found 9/29![Cathay Pacific logo]()
$1,231
This Singapore Airlines deal was found by Cheapflights users on 9/26. 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 Singapore Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2911:40 am -
2 stops40h 35m
Mon 11/24:25 pm -
3 stops43h 00m
Deal found 9/26![Singapore Airlines logo]()
$3,325
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 October 1, 2026.
Round-trip from | $1,231 (Cathay Pacific) |
|---|
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 7,457,451 searches. Data last updated October 1, 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
Cheapest round-trip
San DiegoKo Samui
SAN San Diego - USM Ko Samui
SANUSM
San Diego
Thu 10/29
7:50 am-7:35 pm
2 stops45h 45m
Ko Samui
Mon 11/2
11:40 am-2:47 pm
2 stops42h 07m
$1,231
Quickest round-trip
San DiegoKo Samui
SAN San Diego - USM Ko Samui
SANUSM
San Diego
Thu 10/29
11:40 am-6:15 pm
2 stops40h 35m
Ko Samui
Mon 11/2
4:25 pm-8:25 pm
3 stops43h 00m
$3,325
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.
SAN-USM
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 19% of weekly flights between San Diego and Ko Samui have experienced delays in the past year, with the average delay time being 174 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 early afternoon 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 Thursday 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 12% 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.
Traveling to a place near Ko Samui?
Book flights to Ko Samui if you plan to visit one of these locationsKo Tao
Ko Pha Ngan
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