$649 Cheap Cathay Pacific flights Sydney (SYD) to Samui Intl. Airport (USM)

View $649 flight on Wed, Mar 18, 2026Opens in a new window
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$649 Cheap Cathay Pacific flights Sydney (SYD) to Samui Intl. Airport (USM)

Prices were available within the past 7 days and start at $649 for one-way flights and $1,081 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Cathay Pacific
Wed, Mar 18 - Mon, Mar 23
SYD
Sydney
USM
Koh Samui
$1,081 Roundtrip, found 4 hours ago
$1,081
Roundtrip
found 4 hours ago
Select Cathay Pacific flight, departing Wed, Mar 18 from Sydney to Koh Samui, returning Mon, Mar 23, priced at $1,081 found 4 hours ago
Flights from Sydney (SYD) to Samui Intl. Airport (USM)
Origin airport
Kingsford Smith Intl.
Destination airport
Samui Intl. Airport
Airlines serving
Bangkok Airways, British Airways, Cathay Pacific, China Airlines, Malaysia Airlines, Qantas Airways, Scoot, Singapore Airlines, Thai Airways International
Popular airline
Thai Airways International
Distance
4497 mi

Frequently asked questions

How much is a Cathay Pacific flight from Kingsford Smith Intl. Airport (SYD) to Ko Samui Airport (USM)?
Use the "Price (lowest to highest)" filter on Expedia to search for cheap Cathay Pacific round-trip flights from $1,081 from SYD to USM. Affordable one-way options from $649 are also available.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from SYD to USM with Cathay Pacific?
October is one of the cheapest months to fly to Koh Samui with Cathay Pacific. You could also find great prices on return and one-way fares in September.
What is the cheapest time to book flights from Kingsford Smith Intl. Airport (SYD) to Ko Samui Airport (USM) with Cathay Pacific?
To find affordable flights from SYD to USM with Cathay Pacific, start your search about one month before your intended departure. You can save 17% when you lock in your international tickets 18 to 29 days ahead instead of booking four to five months in advance. Another good tip? Booking on Sunday can lead to average savings of 17% compared to Friday (the most expensive day).**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does Cathay Pacific fly nonstop from Kingsford Smith Intl. Airport (SYD) to Ko Samui Airport (USM)?
Click on the "Nonstop" filter when browsing for direct Cathay Pacific flights from SYD to USM. You'll also be able to compare other airlines servicing the same direct trip.
What is the earliest Cathay Pacific flight from SYD to USM?
To find the earliest departure from SYD to USM with Cathay Pacific, filter your search by "Morning" and "Early Morning." Booking an early flight usually means you're less likely to experience cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does Cathay Pacific fly into in Koh Samui?
Hop on a Cathay Pacific flight from Kingsford Smith Intl. Airport (SYD) to Koh Samui, and you'll probably arrive at Ko Samui Airport (USM). This is the airline's primary hub in this destination.
What kind of luggage can I take on a Cathay Pacific flight from Kingsford Smith Intl. Airport (SYD) to Ko Samui Airport (USM)?
With Cathay Pacific, you can fly standard economy from SYD to USM with a small personal item and 1 cabin bag. Your carry-on bag should be no bigger than 22 inches x 9 inches x 14 inches and weigh under 33 lb. Exceeding baggage limits may lead to additional charges, so read your airline's current policies before confirming your booking.
Why fly with Cathay Pacific from SYD to USM?
Taking off from SYD to USM with Cathay Pacific comes with a variety of perks, including top-tier customer service and an excellent in-flight experience. Plus, when you book through Expedia, One Key™ members can collect OneKeyCash™* to use on select future travel purchases. That's on top of the Marco Polo Club points you can earn with Cathay Pacific.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my Cathay Pacific flight from Kingsford Smith Intl. Airport (SYD) to Ko Samui Airport (USM)?
It's generally possible to reschedule or cancel your flight, although additional charges may apply if you booked over 24 hours ago. Need flexible options? Use our "No cancel fee" and "Changes included" filters to find flights that won't charge extra if you have to revise your plans. To modify your booking, head to "Trips," select your flight and click on "Manage Booking" for further information.
*Available to One Key members.