$597+ 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 2/7. Fares are subject to change and may not be available on all flights or dates of travel.
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
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 November 24, 2025.
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $2,219 (British Airways) |
One-way from | $597 (Kiwi.com) |
Find flight deals from San Diego to Ko Samui
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 November 24, 2025.
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 November 24, 2025.
This British Airways deal was found by Cheapflights users on 11/21. 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.
Cheapflights Fare Finder
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
San DiegoKo Samui
SAN - USM
SANUSM
San Diego
Thu 4/30
4:45 pm-6:15 pm
2 stops59h 30m
Ko Samui
Mon 5/4
4:25 pm-5:50 pm
2 stops39h 25m
San DiegoKo Samui
SAN - USM
SANUSM
San Diego
Sat 2/7
4:01 pm-7:30 am
3 stops48h 29m
San DiegoKo Samui
SAN - USM
SANUSM
San Diego
Tue 2/10
8:59 pm-7:35 am
3 stops43h 36m
San DiegoKo Samui
SAN - USM
SANUSM
San Diego
Mon 2/9
8:59 pm-3:10 pm
3 stops51h 11m
San DiegoKo Samui
SAN - USM
SANUSM
San Diego
Sun 2/8
8:59 pm-8:00 am
2 stops44h 01m
San DiegoKo Samui
SAN - USM
SANUSM
San Diego
Wed 2/11
7:00 am-7:35 am
3 stops33h 35m
San DiegoKo Samui
SAN - USM
SANUSM
San Diego
Thu 2/12
2:50 pm-3:40 pm
3 stops33h 50m
San DiegoKo Samui
SAN - USM
SANUSM
San Diego
Fri 2/13
2:50 pm-3:40 pm
3 stops33h 50m
San DiegoKo Samui
SAN - USM
SANUSM
San Diego
Fri 2/13
5:35 pm-6:55 pm
2 stops34h 20m
- Most accurate provider: When it comes to deals on San Diego-Ko Samui flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on San Diego-Ko Samui flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from San Diego-Ko Samui flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on San Diego-Ko Samui flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for San Diego-Ko Samui flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
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.
Cheapflights Insights
Everything you need to know about your flight from San Diego to Ko Samui
What is the cheapest time of day to fly from SAN to USM?
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?
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 15% of weekly flights between San Diego and Ko Samui have experienced delays in the past year, with the average delay time being 160 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?
Wednesday 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, Japan Airlines have had the lowest number of delays on this route, with no flights being classified as delayed.