$948 Cheap Cathay Pacific flights Denver (DEN) to Samui Intl. Airport (USM)

View $948 flight on Tue, Sep 16, 2025Opens in a new window

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$948 Cheap Cathay Pacific flights Denver (DEN) to Samui Intl. Airport (USM)

Prices were available within the past 7 days and start at $948 for one-way flights and $1,733 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Cathay Pacific
Tue, Sep 16 - Mon, Sep 29
DEN
Denver
USM
Koh Samui
$1,733 Roundtrip, found 6 days ago
$1,733
Roundtrip
found 6 days ago
Select Cathay Pacific flight, departing Tue, Sep 16 from Denver to Koh Samui, returning Mon, Sep 29, priced at $1,733 found 6 days ago
Flights from Denver (DEN) to Samui Intl. Airport (USM)
Origin airport
Denver Intl.
Destination airport
Samui Intl. Airport
Airlines serving
British Airways, Cathay Pacific
Popular airline
Cathay Pacific
Distance
8673 mi

Frequently asked questions

How much is a Cathay Pacific flight from Denver Intl. Airport (DEN) to Ko Samui Airport (USM)?
Scoring cheap one-way Cathay Pacific flights from DEN to USM from $948 on Expedia is easy --- just filter by "Price (lowest to highest)." Alternatively, check out our affordable return fares from $1,733 for your next exciting getaway.**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 DEN to USM with Cathay Pacific?
Browse for round-trip or one-way flights to Koh Samui in October or September. You could find a cheap fare with Cathay Pacific during these off-peak months.
What is the cheapest time to book flights from Denver Intl. Airport (DEN) to Ko Samui Airport (USM) with Cathay Pacific?
Getting the best Cathay Pacific deals from DEN to USM often comes down to booking at the right time. You can save 17% on international flights when you book 18 to 29 days before takeoff instead of four to five months ahead. Better still, you can pocket 17% on average by buying your fare on a Sunday rather than a Friday, which is often the most expensive day to book.* It's a good idea to start checking out flights about one month before your departure date.*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 Denver Intl. Airport (DEN) to Ko Samui Airport (USM)?
Click on the "Nonstop" filter when looking for direct Cathay Pacific flights from DEN to USM. You can also compare other carriers servicing the same nonstop route.
What is the earliest Cathay Pacific flight from DEN to USM?
Sort your results by "Early Morning" and "Morning" to find the earliest flights from DEN to USM. Leaving early means you're 20% 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 Denver Intl. Airport (DEN) to Koh Samui, and you'll likely come in to Ko Samui Airport (USM). This is the airline's primary hub in this city.
What kind of luggage can I take on a Cathay Pacific flight from Denver Intl. Airport (DEN) to Ko Samui Airport (USM)?
You're allowed 1 cabin bag weighing up to 33 lb and dimensions not exceeding 22 inches x 9 inches x 14 inches. You may also bring a small personal item with you when flying standard economy from DEN to USM with Cathay Pacific. Baggage allowances may differ by cabin class and fare type, so check Cathay Pacific's website to avoid any last-minute fees at the airport.
Why fly with Cathay Pacific from DEN to USM?
With top-tier customer service and an excellent in-flight experience, Cathay Pacific is a popular option for many passengers flying from DEN to USM. What's more, if you're a Marco Polo Club and One Key™ member booking with Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles, which can be spent on future travel purchases.*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 Denver Intl. Airport (DEN) to Ko Samui Airport (USM)?
Depending on your fare type, a fee may apply if you cancel or reschedule your flight more than 24 hours after confirmation. To find flexible plane tickets, select our "Changes included" and "No cancel fee" boxes when you search for flights. For additional information on changing or canceling your reservation, head to "Trips," select your flight and tick "Manage Booking."

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*Available to One Key members.