$1,016 Cheap Cathay Pacific flights Philadelphia (PHL) to Samui Intl. Airport (USM)

View $1,016 flight on Thu, Oct 16, 2025Opens in a new window

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$1,016 Cheap Cathay Pacific flights Philadelphia (PHL) to Samui Intl. Airport (USM)

Prices were available within the past 7 days and start at $1,016 for one-way flights and $1,704 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Cathay Pacific
Thu, Oct 9 - Mon, Oct 13
PHL
Philadelphia
USM
Koh Samui
$1,704 Roundtrip, found 2 days ago
$1,704
Roundtrip
found 2 days ago
Select Cathay Pacific flight, departing Thu, Oct 9 from Philadelphia to Koh Samui, returning Mon, Oct 13, priced at $1,704 found 2 days ago
Flights from Philadelphia (PHL) to Samui Intl. Airport (USM)
Origin airport
Philadelphia Intl.
Destination airport
Samui Intl. Airport
Airlines serving
British Airways, Qatar Airways
Popular airline
Qatar Airways
Distance
9008 mi

Frequently asked questions

How much is a Cathay Pacific flight from Philadelphia Intl. Airport (PHL) to Ko Samui Airport (USM)?
Make use of the "Price (lowest to highest)" filter on Expedia to find cheap Cathay Pacific return flights from $1,704 from PHL to USM. Affordable one-way fares from $1,016 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 PHL to USM with Cathay Pacific?
October is one of the most affordable months to get away to Koh Samui with Cathay Pacific. You could also find fantastic deals on one-way and return fares in September.
What is the cheapest time to book flights from Philadelphia Intl. Airport (PHL) to Ko Samui Airport (USM) with Cathay Pacific?
Look for Cathay Pacific flights from PHL to USM about one month before you want to go. The cheapest time to book an international flight is usually 18 to 29 days ahead of your departure date when you can save 17% versus booking four to five months in advance. No matter your fare class or itinerary, the best day to book international airfare is usually Sunday. Friday is often the most expensive. Passengers booking on a Sunday can save 17% on average compared to those who book on a Friday.**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 Philadelphia Intl. Airport (PHL) to Ko Samui Airport (USM)?
To figure out if there's a direct trip from PHL to USM with Cathay Pacific or any other airlines, check the "Nonstop" box when searching for flights.
What is the earliest Cathay Pacific flight from PHL to USM?
Browse Cathay Pacific's earliest flights from PHL to USM by checking the "Morning" and "Early Morning" filters. Not only will you get to where you're going sooner, early departures also experience 20% fewer 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?
Catch a Cathay Pacific flight from Philadelphia Intl. Airport (PHL) to Koh Samui, and you'll probably come in to Ko Samui Airport (USM). This is the airline's main hub here.
What kind of luggage can I take on a Cathay Pacific flight from Philadelphia Intl. Airport (PHL) to Ko Samui Airport (USM)?
A standard economy flight with Cathay Pacific from PHL to USM includes 1 cabin bag and a small personal item. Your hand luggage allowance is 1 cabin bag up to 33 lb with maximum dimensions of 22 inches x 9 inches x 14 inches. Weight and size restrictions can differ based on your cabin class and ticket type. To avoid additional fees at the airport, double-check your Cathay Pacific booking or visit the airline's website before you start to pack.
Why fly with Cathay Pacific from PHL to USM?
With top-tier customer service and a 5-star airline rating, Cathay Pacific is a top choice for many passengers heading from PHL to USM. Also, 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 you can put toward future travel.*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 Philadelphia Intl. Airport (PHL) to Ko Samui Airport (USM)?
You can usually reschedule or cancel your flight, although there may be additional charges if your booking was made more than 24 hours ago. Prefer to keep your options open? Make use of Expedia's "Changes included" and "No cancel fee" filters to find flights that won't charge extra if you need to adjust your plans. To modify your booking, go to "Trips," select your flight and click on "Manage Booking" for more details.

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*Available to One Key members.