$653+ Cheap flights from San Diego (SAN) 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 8/2. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — USM
May 1 — May 81
Round-trip
1 adult, Economy
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Find cheap flights from San Diego to Ko Samui with Cheapflights
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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from San Diego to Ko Samui
Cheapest
Best
Last-minute
One-way
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 April 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 April 1, 2026.
This EVA Air deal was found by Cheapflights users on 3/28. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/129:12 pm
SAN
- USM
3 stops26h 33m
Multiple Airlines
Tue 5/191:50 pm
USM
- SAN
3 stops24h 09m
Multiple Airlines
Deal found 3/28![Multiple Airlines logo]()
$1,337
This oojo deal was found by Cheapflights users on 3/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/122:31 pm
SAN
- USM
2 stops63h 09m
Cathay Pacific
Tue 5/1911:55 am
USM
- SAN
2 stops34h 03m
Cathay Pacific
Deal found 3/28![Cathay Pacific logo]()
$1,443
This IEagle deal was found by Cheapflights users on 3/31. 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.
Fri 5/157:43 am
SAN
- USM
3 stops34h 32m
Multiple Airlines
Fri 5/222:00 pm
USM
- SAN
3 stops36h 14m
Multiple Airlines
Deal found 3/31![Multiple Airlines logo]()
$1,490
This IEagle deal was found by Cheapflights users on 3/28. 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.
Mon 4/207:40 am
SAN
- USM
3 stops33h 30m
Multiple Airlines
Mon 4/278:50 pm
USM
- SAN
3 stops27h 35m
Multiple Airlines
Deal found 3/28![Multiple Airlines logo]()
$1,502
This Japan Airlines deal was found by Cheapflights users on 3/28. 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 Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/111:35 pm
SAN
- USM
2 stops31h 40m
Japan Airlines
Tue 9/158:35 pm
USM
- SAN
2 stops29h 00m
Japan Airlines
Deal found 3/28![Japan Airlines logo]()
$1,528
This EVA Air deal was found by Cheapflights users on 3/29. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/19:27 pm
SAN
- USM
3 stops27h 18m
Multiple Airlines
Thu 8/62:00 pm
USM
- SAN
3 stops23h 56m
Multiple Airlines
Deal found 3/29![Multiple Airlines logo]()
$1,712
This Japan Airlines deal was found by Cheapflights users on 3/30. 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.
Tue 9/81:35 pm
SAN
- USM
2 stops31h 40m
Japan Airlines
Sat 9/127:50 am
USM
- SAN
2 stops41h 45m
Japan Airlines
Deal found 3/30![Japan Airlines logo]()
$1,720
This Priceline deal was found by Cheapflights users on 3/31. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/154:41 pm
SAN
- USM
2 stops36h 59m
Cathay Pacific
Fri 5/2211:55 am
USM
- SAN
2 stops44h 31m
Cathay Pacific
Deal found 3/31![Cathay Pacific logo]()
$1,891
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 April 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 April 1, 2026.
This EVA Air deal was found by Cheapflights users on 3/28. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/129:12 pm
SAN
- USM
3 stops26h 33m
Multiple Airlines
Tue 5/191:50 pm
USM
- SAN
3 stops24h 09m
Multiple Airlines
Deal found 3/28![Multiple Airlines logo]()
$1,337
This oojo deal was found by Cheapflights users on 3/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/122:31 pm
SAN
- USM
2 stops63h 09m
Cathay Pacific
Tue 5/1911:55 am
USM
- SAN
2 stops34h 03m
Cathay Pacific
Deal found 3/28![Cathay Pacific logo]()
$1,443
This IEagle deal was found by Cheapflights users on 3/31. 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.
Fri 5/157:43 am
SAN
- USM
3 stops34h 32m
Multiple Airlines
Fri 5/222:00 pm
USM
- SAN
3 stops36h 14m
Multiple Airlines
Deal found 3/31![Multiple Airlines logo]()
$1,490
This IEagle deal was found by Cheapflights users on 3/28. 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.
Mon 4/207:40 am
SAN
- USM
3 stops33h 30m
Multiple Airlines
Mon 4/278:50 pm
USM
- SAN
3 stops27h 35m
Multiple Airlines
Deal found 3/28![Multiple Airlines logo]()
$1,502
This Priceline deal was found by Cheapflights users on 3/31. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/154:41 pm
SAN
- USM
2 stops36h 59m
Cathay Pacific
Fri 5/2211:55 am
USM
- SAN
2 stops44h 31m
Cathay Pacific
Deal found 3/31![Cathay Pacific logo]()
$1,891
Last-minute flights from San Diego to Ko SamuiDiscover last-minute flight deals from San Diego to Ko Samui. Data last updated April 1, 2026 and is based on user searches.
Discover last-minute flight deals from San Diego to Ko Samui. Data last updated April 1, 2026 and is based on user searches.
This IEagle deal was found by Cheapflights users on 3/28. 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.
Mon 4/207:40 am
SAN
- USM
3 stops33h 30m
Multiple Airlines
Mon 4/278:50 pm
USM
- SAN
3 stops27h 35m
Multiple Airlines
Deal found 3/28![Multiple Airlines logo]()
$1,502
One-way flights from San Diego to Ko SamuiSearch for one-way flight options from San Diego to Ko Samui. Find affordable one-way fares based on user searches. Data last updated April 1, 2026.
Search for one-way flight options from San Diego to Ko Samui. Find affordable one-way fares based on user searches. Data last updated April 1, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/27:48 am
SAN
- USM
3 stops45h 02m
Multiple Airlines
Deal found 3/29![Multiple Airlines logo]()
$653
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 1, 2026.
Round-trip from | $1,337 (EVA Air) |
|---|---|
One-way from | $653 (Kiwi.com) |
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 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
Quickest round-trip
San DiegoKo Samui
SAN - USM
SANUSM
San Diego
Tue 5/12
9:12 pm-1:45 pm
3 stops26h 33m
Ko Samui
Tue 5/19
1:50 pm-11:59 pm
3 stops24h 09m
$1,337
San DiegoKo Samui
SAN - USM
SANUSM
San Diego
Tue 5/12
2:31 pm-7:40 pm
2 stops63h 09m
Ko Samui
Tue 5/19
11:55 am-7:58 am
2 stops34h 03m
$1,443
San DiegoKo Samui
SAN - USM
SANUSM
San Diego
Fri 5/15
7:43 am-8:15 am
3 stops34h 32m
Ko Samui
Fri 5/22
2:00 pm-12:14 pm
3 stops36h 14m
$1,490
San DiegoKo Samui
SAN - USM
SANUSM
San Diego
Mon 4/20
7:40 am-7:10 am
3 stops33h 30m
Ko Samui
Mon 4/27
8:50 pm-10:25 am
3 stops27h 35m
$1,502
San DiegoKo Samui
SAN - USM
SANUSM
San Diego
Fri 5/15
4:41 pm-7:40 pm
2 stops36h 59m
Ko Samui
Fri 5/22
11:55 am-6:26 pm
2 stops44h 31m
$1,891
Cheapest one-way
Quickest one-way
San DiegoKo Samui
SAN - USM
SANUSM
San Diego
Sun 8/2
7:48 am-6:50 pm
3 stops45h 02m
$653
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
Prices
Delays
What is the cheapest time of day to fly from SAN to USM?
Find hourly flight availability from San Diego 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 April 1, 2026.
When flying from San Diego to Ko Samui, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 27% versus a flight in the afternoon.
What is the cheapest day to fly from San Diego to Ko Samui?
Use this chart to determine the cheapest time to fly round-trip from San Diego to Ko Samui. Price data was last updated on March 30, 2025.
Travelers seeking maximum savings on their San Diego to Ko Samui flight should consider departing on Wednesday at noon when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
How often are flights from San Diego to Ko Samui delayed?
About 12% of weekly flights between San Diego and Ko Samui have experienced delays in the past year, with the average delay time being 158 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 7% 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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