$480 Cheap Flights from Phoenix (PHX) to Samui Intl. Airport (USM)

View $480 flight on Thu, Jan 22, 2026Opens in a new window

Popular airlines from Phoenix Sky Harbor Intl. Airport (PHX) to Samui Intl. Airport (USM)

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Cheap Flights from Phoenix to Samui Intl. Airport (PHX-USM)

Prices were available within the past 7 days and start at $480 for one-way flights and $917 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

STARLUX Airlines
Sun, Mar 29 - Tue, Apr 14
PHX
Phoenix
USM
Koh Samui
$917 Roundtrip, found 2 days ago
$917
Roundtrip
found 2 days ago
Select STARLUX Airlines flight, departing Sun, Mar 29 from Phoenix to Koh Samui, returning Tue, Apr 14, priced at $917 found 2 days ago
STARLUX Airlines
Sun, Mar 29 - Mon, Apr 13
PHX
Phoenix
USM
Koh Samui
$927 Roundtrip, found 2 days ago
$927
Roundtrip
found 2 days ago
Select STARLUX Airlines flight, departing Sun, Mar 29 from Phoenix to Koh Samui, returning Mon, Apr 13, priced at $927 found 2 days ago
United
Tue, Feb 10 - Mon, Feb 23
PHX
Phoenix
USM
Koh Samui
$932 Roundtrip, found 2 days ago
$932
Roundtrip
found 2 days ago
Select United flight, departing Tue, Feb 10 from Phoenix to Koh Samui, returning Mon, Feb 23, priced at $932 found 2 days ago
United
Mon, Mar 30 - Mon, Apr 13
PHX
Phoenix
USM
Koh Samui
$934 Roundtrip, found 2 days ago
$934
Roundtrip
found 2 days ago
Select United flight, departing Mon, Mar 30 from Phoenix to Koh Samui, returning Mon, Apr 13, priced at $934 found 2 days ago
United
Wed, Apr 1 - Mon, Apr 13
PHX
Phoenix
USM
Koh Samui
$936 Roundtrip, found 2 days ago
$936
Roundtrip
found 2 days ago
Select United flight, departing Wed, Apr 1 from Phoenix to Koh Samui, returning Mon, Apr 13, priced at $936 found 2 days ago
United
Sun, Oct 19 - Sun, Oct 26
PHX
Phoenix
USM
Koh Samui
$938 Roundtrip, found 6 days ago
$938
Roundtrip
found 6 days ago
Select United flight, departing Sun, Oct 19 from Phoenix to Koh Samui, returning Sun, Oct 26, priced at $938 found 6 days ago
United
Mon, Dec 1 - Wed, Dec 17
PHX
Phoenix
USM
Koh Samui
$940 Roundtrip, found 4 days ago
$940
Roundtrip
found 4 days ago
Select United flight, departing Mon, Dec 1 from Phoenix to Koh Samui, returning Wed, Dec 17, priced at $940 found 4 days ago
China Airlines
Sun, Mar 8 - Mon, Mar 23
PHX
Phoenix
USM
Koh Samui
$1,167 Roundtrip, found 2 days ago
$1,167
Roundtrip
found 2 days ago
Select China Airlines flight, departing Sun, Mar 8 from Phoenix to Koh Samui, returning Mon, Mar 23, priced at $1,167 found 2 days ago
Cathay Pacific
Thu, Oct 16 - Thu, Oct 23
PHX
Phoenix
USM
Koh Samui
$1,408 Roundtrip, found 13 hours ago
$1,408
Roundtrip
found 13 hours ago
Select Cathay Pacific flight, departing Thu, Oct 16 from Phoenix to Koh Samui, returning Thu, Oct 23, priced at $1,408 found 13 hours ago
KLM
Thu, Apr 9 - Sun, Apr 19
PHX
Phoenix
USM
Koh Samui
$1,837 Roundtrip, found 4 days ago
$1,837
Roundtrip
found 4 days ago
Select KLM flight, departing Thu, Apr 9 from Phoenix to Koh Samui, returning Sun, Apr 19, priced at $1,837 found 4 days ago

Alternative airports near Koh Samui

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Samui Intl. Airport USM. Cheapest and Closest option available. Average driving time to city center is 31 minutes. Flights from $972
USM
Samui Intl. Airport
CheapestClosest
Average driving time to city center31 min
Flights from $972

Frequently asked questions

How much does a flight from Sky Harbor Intl. Airport (PHX) to Ko Samui Airport (USM) cost?
Lock in a cheap one-way flight from $480 or cheap return flight from $917 from Sky Harbor Intl. Airport (PHX) to Ko Samui Airport (USM) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Sky Harbor Intl. Airport (PHX) to Ko Samui Airport (USM)?
The cheapest month to fly from PHX to USM is March, when demand is low. Off-peak months are often when you'll find lower airfares between these airports.
What is the cheapest airline that flies from Sky Harbor Intl. Airport (PHX) to Ko Samui Airport (USM)?
To find the cheapest airline flying from PHX to USM, use Expedia's filter tool. Tailor your search based on your travel style, such as preferred carriers and number of stops. You can then sort your results by "Price (lowest to highest)" to discover the cheapest flight right away.
How many flights per day from Sky Harbor Intl. Airport (PHX) to Ko Samui Airport (USM)?
Nonstop flights from Sky Harbor Intl. Airport (PHX) to Ko Samui Airport (USM) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel dates and pick either "1 Stop" or "2+ Stops."
What day of the week has the most flights from PHX to USM?
Usually you'll find the widest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* But this can change based on the airline, time of year and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Sky Harbor Intl. Airport (PHX) to Ko Samui Airport (USM)?
To touch down at Ko Samui Airport (USM) on time, choose a flight that takes off from Sky Harbor Intl. Airport (PHX) 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 Sky Harbor Intl. Airport (PHX) to Ko Samui Airport (USM) last-minute?
Holding off until just before your trip to book your flight from PHX to USM often results in higher prices. While it's possible to find some last-minute discounts, they're not always guaranteed. Be flexible with your itinerary for the best chance of getting a bargain.
Is it cheaper to book a PHX to USM flight and hotel package?
Opting for a PHX to USM flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels in one place. Select from our impressive range of hotels and then add activities, car rentals and flights to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Sky Harbor Intl. Airport (PHX) to Ko Samui Airport (USM)?
Usually, it's possible to reschedule or cancel your PHX to USM flight. However, if it's been more than 24 hours since booking, additional charges may apply. Check your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find more details on our Customer Service portal.

Travel information

Origin airport
Sky Harbor Intl.
Destination airport
Samui Intl. Airport
Airlines serving
British Airways, Cathay Pacific
Roundtrip price
$917
Distance
8794 mi

Book with confidence

Phoenix to Samui Intl. Airport Flights

The cheapest times to fly from Phoenix to Samui Intl. Airport

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 Phoenix to Samui Intl. Airport are during the month of March. You can find some of the cheapest flights from Phoenix to Samui Intl. Airport with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Phoenix to Samui Intl. Airport: 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 Phoenix to Samui Intl. Airport

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 Phoenix to Samui Intl. Airport in 2025. You can also book with separate airlines for your outbound and return journeys, from $480 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 Phoenix to Samui Intl. Airport 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 Phoenix to Samui Intl. Airport 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.

 

Phoenix to Samui Intl. Airport Flights
*Available to One Key members.