$622+ 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 3/7. 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
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Find flight deals from San Diego to Ko Samui
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 septiembre 11, 2025.
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 septiembre 11, 2025.
This Cathay Pacific deal was found by Cheapflights users on 9/8. 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.
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
sáb. 3/7
5:10 pm-3:35 pm
3 stops31h 25m
San DiegoKo Samui
SAN - USM
SANUSM
San Diego
mié. 3/4
12:35 pm-7:10 am
3 stops51h 35m
San DiegoKo Samui
SAN - USM
SANUSM
San Diego
dom. 3/8
12:35 pm-7:35 pm
3 stops41h 00m
San DiegoKo Samui
SAN - USM
SANUSM
San Diego
lun. 3/9
12:35 pm-7:35 pm
3 stops41h 00m
San DiegoKo Samui
SAN - USM
SANUSM
San Diego
jue. 3/5
8:20 am-7:35 pm
3 stops44h 15m
San DiegoKo Samui
SAN - USM
SANUSM
San Diego
mar. 3/3
8:20 am-7:35 pm
3 stops44h 15m
San DiegoKo Samui
SAN - USM
SANUSM
San Diego
vie. 3/6
2:40 pm-3:40 pm
3 stops34h 00m
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 28% 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. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.