$553 Cheap Flights from Samui Intl. Airport (USM) to San Diego (SAN)

View $553 flight on Thu, Oct 30, 2025Opens in a new window

Popular airlines from Samui Intl. Airport (USM) to San Diego Intl. Airport (SAN)

Cheap Flights from Samui Intl. Airport to San Diego (USM-SAN)

Prices were available within the past 7 days and start at $553 for one-way flights and $1,654 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Cathay Pacific
Thu, Oct 23 - Thu, Oct 30
USM
Koh Samui
SAN
San Diego
$1,654 Roundtrip, found 1 day ago
$1,654
Roundtrip
found 1 day ago
Select Cathay Pacific flight, departing Thu, Oct 23 from Koh Samui to San Diego, returning Thu, Oct 30, priced at $1,654 found 1 day ago
Cathay Pacific
Thu, Oct 23 - Thu, Oct 30
USM
Koh Samui
SAN
San Diego
$1,662 Roundtrip, found 1 day ago
$1,662
Roundtrip
found 1 day ago
Select Cathay Pacific flight, departing Thu, Oct 23 from Koh Samui to San Diego, returning Thu, Oct 30, priced at $1,662 found 1 day ago
Cathay Pacific
Thu, Oct 23 - Thu, Oct 30
USM
Koh Samui
SAN
San Diego
$1,673 Roundtrip, found 1 day ago
$1,673
Roundtrip
found 1 day ago
Select Cathay Pacific flight, departing Thu, Oct 23 from Koh Samui to San Diego, returning Thu, Oct 30, priced at $1,673 found 1 day ago
Cathay Pacific
Thu, Oct 23 - Thu, Oct 30
USM
Koh Samui
SAN
San Diego
$1,682 Roundtrip, found 1 day ago
$1,682
Roundtrip
found 1 day ago
Select Cathay Pacific flight, departing Thu, Oct 23 from Koh Samui to San Diego, returning Thu, Oct 30, priced at $1,682 found 1 day ago
Singapore Airlines
Thu, Oct 23 - Thu, Oct 30
USM
Koh Samui
SAN
San Diego
$1,694 Roundtrip, found 1 day ago
$1,694
Roundtrip
found 1 day ago
Select Singapore Airlines flight, departing Thu, Oct 23 from Koh Samui to San Diego, returning Thu, Oct 30, priced at $1,694 found 1 day ago
Cathay Pacific
Thu, Oct 23 - Thu, Oct 30
USM
Koh Samui
SAN
San Diego
$1,719 Roundtrip, found 1 day ago
$1,719
Roundtrip
found 1 day ago
Select Cathay Pacific flight, departing Thu, Oct 23 from Koh Samui to San Diego, returning Thu, Oct 30, priced at $1,719 found 1 day ago
Cathay Pacific
Thu, Oct 23 - Thu, Oct 30
USM
Koh Samui
SAN
San Diego
$1,728 Roundtrip, found 1 day ago
$1,728
Roundtrip
found 1 day ago
Select Cathay Pacific flight, departing Thu, Oct 23 from Koh Samui to San Diego, returning Thu, Oct 30, priced at $1,728 found 1 day ago
Cathay Pacific
Thu, Oct 23 - Thu, Oct 30
USM
Koh Samui
SAN
San Diego
$1,789 Roundtrip, found 1 day ago
$1,789
Roundtrip
found 1 day ago
Select Cathay Pacific flight, departing Thu, Oct 23 from Koh Samui to San Diego, returning Thu, Oct 30, priced at $1,789 found 1 day ago
British Airways
Thu, Oct 23 - Thu, Oct 30
USM
Koh Samui
SAN
San Diego
$2,832 Roundtrip, found 1 day ago
$2,832
Roundtrip
found 1 day ago
Select British Airways flight, departing Thu, Oct 23 from Koh Samui to San Diego, returning Thu, Oct 30, priced at $2,832 found 1 day ago
Lufthansa
Thu, Oct 23 - Thu, Oct 30
USM
Koh Samui
SAN
San Diego
$2,981 Roundtrip, found 1 day ago
$2,981
Roundtrip
found 1 day ago
Select Lufthansa flight, departing Thu, Oct 23 from Koh Samui to San Diego, returning Thu, Oct 30, priced at $2,981 found 1 day ago

Frequently asked questions

How much does a flight from Ko Samui Airport (USM) to San Diego Intl. Airport (SAN) cost?
Grab a cheap one-way flight from $553 or cheap return flight from $1,654 from Ko Samui Airport (USM) to San Diego Intl. Airport (SAN) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Ko Samui Airport (USM) to San Diego Intl. Airport (SAN)?
Planning your trip for October is a great way to save, as it's the cheapest month for flights between USM and SAN. You'll usually find the lowest prices during the off-season.
What is the cheapest airline that flies from Ko Samui Airport (USM) to San Diego Intl. Airport (SAN)?
Expedia's filter tool lets you easily compare airlines, flight times and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest USM to SAN flight.
How many flights per day from Ko Samui Airport (USM) to San Diego Intl. Airport (SAN)?
You'll have to catch a flight with a layover if you're traveling from Ko Samui Airport (USM) to San Diego Intl. Airport (SAN). Direct flights don't operate daily on this route. However, simply filter your search to include one or more stops to find an option that works for you.
What day of the week has the most flights from USM to SAN?
Friday is generally the busiest day for flights, while Tuesday tends to be the quietest.* Keep in mind that flight schedules can vary based on a range of factors, such as the time of year and carrier.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Ko Samui Airport (USM) to San Diego Intl. Airport (SAN)?
To land at San Diego Intl. Airport (SAN) on time, opt for a flight that leaves Ko Samui Airport (USM) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Ko Samui Airport (USM) to San Diego Intl. Airport (SAN) last-minute?
Holding off until right before your break to book your flight from USM to SAN generally means paying more. While it's possible to find some last-minute discounts, they're not always guaranteed. Keep your travel plans flexible for the best chance of scoring a bargain.
Is it cheaper to book an USM to SAN flight and hotel package?
You'll typically save money by securing an USM to SAN flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one convenient place. After choosing your preferred accommodations and flights, consider other add-ons like tours, car rentals and activities.
Can I cancel or change the date of my flight from Ko Samui Airport (USM) to San Diego Intl. Airport (SAN)?
It's usually possible to reschedule or cancel your USM to SAN flight. However, if the booking was made more than 24 hours ago, additional fees may apply. Check your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more information on our Customer Service portal.

Travel information

Travel information

Origin airport
Samui Intl. Airport
Destination airport
San Diego Intl.
Airlines serving
British Airways, Cathay Pacific, Lufthansa
Roundtrip price
$1,653
Distance
8621 mi

Book with confidence

Book with confidence

Samui Intl. Airport to San Diego Flights

The cheapest times to fly from Samui Intl. Airport to San Diego

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Samui Intl. Airport to San Diego are during the month of October. You can find some of the cheapest flights from Samui Intl. Airport to San Diego with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Samui Intl. Airport to San Diego

Sunday is one of the best days to book for cheap flights from Samui Intl. Airport to San Diego: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Samui Intl. Airport to San Diego

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Samui Intl. Airport to San Diego in 2025. You can also book with separate airlines for your outbound and return journeys, from $553 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Samui Intl. Airport to San Diego flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Samui Intl. Airport to San Diego airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Samui Intl. Airport to San Diego Flights
*Available to One Key members.