How long is the flight from San Diego to Ko Samui?

Japan Airlines can get you from San Diego to Ko Samui in just under 30h 20m. Your travel time can differ by up to . San Diego and Ko Samui are separated by a distance of 8616 mi.

In terms of precipitation, rainfall in Ko Samui ranges from 2.3 - 19.3 inches per month. November is typically the wettest month, when rainfall can reach 19.3 in. February is typically the driest time to visit Ko Samui when rainfall is around 2.3 in.

If weather is an important factor for your trip to Ko Samui, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 80.6 F).

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 decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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.

$1,323+ Cheap Flights from San Diego to Ko Samui

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Cheap flight deals from San Diego to Ko Samui

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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 July 20, 2026.

Fri 10/306:51 pm

SAN

USM

3 stops30h 44m

Multiple Airlines

Sat 11/72:30 pm

USM

SAN

3 stops34h 27m

Multiple Airlines

Deal found 7/20

$1,323

Thu 11/197:07 am

SAN

USM

3 stops33h 03m

Multiple Airlines

Fri 12/49:10 pm

USM

SAN

3 stops30h 59m

Multiple Airlines

Deal found 7/17

$1,356

Thu 11/57:07 am

SAN

USM

3 stops33h 03m

Multiple Airlines

Tue 11/247:35 pm

USM

SAN

3 stops43h 08m

Multiple Airlines

Deal found 7/17

$1,368

Tue 9/12:19 pm

SAN

USM

3 stops34h 26m

Multiple Airlines

Tue 9/82:35 pm

USM

SAN

3 stops36h 53m

Multiple Airlines

Deal found 7/18

$1,373

Find flight deals from San Diego to Ko Samui

Round-trip from	$1,323 (KAYAK)

From San Diego to Ko Samui

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Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

San DiegoKo Samui

SAN - USM

SANUSM

San Diego

Tue 9/1

2:19 pm-2:45 pm

3 stops34h 26m

Ko Samui

Tue 9/8

2:35 pm-1:28 pm

3 stops36h 53m

$1,373

San DiegoKo Samui

SAN - USM

SANUSM

San Diego

Wed 10/7

1:00 pm-9:20 am

2 stops30h 20m

Ko Samui

Sun 10/11

7:50 am-11:05 am

2 stops41h 15m

$2,068

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/18

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 13% of weekly flights between San Diego and Ko Samui have experienced delays in the past year, with the average delay time being 156 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 evening 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 8% of flights being delayed.

Related info for your journey

How long is the flight from San Diego to Ko Samui?
Japan Airlines can get you from San Diego to Ko Samui in just under 30h 20m. Your travel time can differ by up to . San Diego and Ko Samui are separated by a distance of 8616 mi.
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.

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$1,323+ 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 10/30. 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

2. Select your favorite providers

3. Compare prices and book

Cheap 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 July 20, 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 July 20, 2026.

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 July 20, 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 July 20, 2026.

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Use the filters below to find and compare flights from San Diego to Ko Samui that are best for you.

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

How often are flights from San Diego to Ko Samui delayed?

About 13% of weekly flights between San Diego and Ko Samui have experienced delays in the past year, with the average delay time being 156 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 evening 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 8% of flights being delayed.

Related info for your journey

How long is the flight from San Diego to Ko Samui?

Can I find deals for flights from San Diego to Ko Samui that include hotel bookings?

How can I find direct flights from San Diego to Ko Samui?

Can I find deals for business class flights from San Diego to Ko Samui?

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Alternative routes for San Diego to Ko Samui

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Complete your trip

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Other flights to Ko Samui

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San Diego and Ko Samui flights

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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 July 20, 2026.

Best flights from San Diego to Ko Samui
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 July 20, 2026.