$531 Cheap Flights from Houston (IAH) to Samui Intl. Airport (USM)

View $531 flight on Wed, Oct 1, 2025Opens in a new window

Popular airlines from George Bush Intercontinental Airport (IAH) to Samui Intl. Airport (USM)

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Cheap Flights from Houston to Samui Intl. Airport (IAH-USM)

Prices were available within the past 7 days and start at $531 for one-way flights and $882 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sun, Sep 14 - Thu, Sep 18
IAH
Houston
USM
Koh Samui
$882 Roundtrip, found 6 hours ago
$882
Roundtrip
found 6 hours ago
Select United flight, departing Sun, Sep 14 from Houston to Koh Samui, returning Thu, Sep 18, priced at $882 found 6 hours ago
United
Tue, Aug 12 - Tue, Aug 19
IAH
Houston
USM
Koh Samui
$889 Roundtrip, found 18 hours ago
$889
Roundtrip
found 18 hours ago
Select United flight, departing Tue, Aug 12 from Houston to Koh Samui, returning Tue, Aug 19, priced at $889 found 18 hours ago
United
Wed, Sep 10 - Sun, Sep 14
IAH
Houston
USM
Koh Samui
$892 Roundtrip, found 1 day ago
$892
Roundtrip
found 1 day ago
Select United flight, departing Wed, Sep 10 from Houston to Koh Samui, returning Sun, Sep 14, priced at $892 found 1 day ago
United
Tue, Aug 12 - Tue, Aug 19
IAH
Houston
USM
Koh Samui
$897 Roundtrip, found 18 hours ago
$897
Roundtrip
found 18 hours ago
Select United flight, departing Tue, Aug 12 from Houston to Koh Samui, returning Tue, Aug 19, priced at $897 found 18 hours ago
United
Sun, Sep 14 - Thu, Sep 18
IAH
Houston
USM
Koh Samui
$901 Roundtrip, found 6 hours ago
$901
Roundtrip
found 6 hours ago
Select United flight, departing Sun, Sep 14 from Houston to Koh Samui, returning Thu, Sep 18, priced at $901 found 6 hours ago
United
Tue, Sep 16 - Wed, Oct 1
IAH
Houston
USM
Koh Samui
$901 Roundtrip, found 1 day ago
$901
Roundtrip
found 1 day ago
Select United flight, departing Tue, Sep 16 from Houston to Koh Samui, returning Wed, Oct 1, priced at $901 found 1 day ago
EVA Airways
Thu, Sep 11 - Mon, Sep 15
IAH
Houston
USM
Koh Samui
$1,184 Roundtrip, found 1 day ago
$1,184
Roundtrip
found 1 day ago
Select EVA Airways flight, departing Thu, Sep 11 from Houston to Koh Samui, returning Mon, Sep 15, priced at $1,184 found 1 day ago
Turkish Airlines
Fri, Sep 12 - Sun, Sep 28
IAH
Houston
USM
Koh Samui
$1,197 Roundtrip, found 1 day ago
$1,197
Roundtrip
found 1 day ago
Select Turkish Airlines flight, departing Fri, Sep 12 from Houston to Koh Samui, returning Sun, Sep 28, priced at $1,197 found 1 day ago
Qatar Airways
Tue, Sep 16 - Tue, Sep 23
IAH
Houston
USM
Koh Samui
$1,501 Roundtrip, found 1 day ago
$1,501
Roundtrip
found 1 day ago
Select Qatar Airways flight, departing Tue, Sep 16 from Houston to Koh Samui, returning Tue, Sep 23, priced at $1,501 found 1 day ago
KLM
Wed, Jan 21 - Tue, Jan 27
IAH
Houston
USM
Koh Samui
$1,775 Roundtrip, found 1 day ago
$1,775
Roundtrip
found 1 day ago
Select KLM flight, departing Wed, Jan 21 from Houston to Koh Samui, returning Tue, Jan 27, priced at $1,775 found 1 day 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 $916
USM
Samui Intl. Airport
CheapestClosest
Average driving time to city center31 min
Flights from $916
Flights from Houston (IAH) to Samui Intl. Airport (USM)
Origin airport
George Bush Intercontinental
Destination airport
Samui Intl. Airport
Airlines serving
Air France, British Airways, Cathay Pacific, EVA Airways, KLM, Qatar Airways, Turkish Airlines
Roundtrip price
$881
Distance
9519 mi

Houston to Samui Intl. Airport Flights

The cheapest times to fly from Houston 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 Houston to Samui Intl. Airport are during the month of September. You can find some of the cheapest flights from Houston to Samui Intl. Airport with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Houston 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 Houston 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 Houston to Samui Intl. Airport in 2025. You can also book with separate airlines for your outbound and return journeys, from $531 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 Houston 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 Houston 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.

 

Frequently asked questions

How much does a flight from George Bush Intercontinental Airport (IAH) to Ko Samui Airport (USM) cost?
Discover the latest flight deals from IAH to USM by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from IAH to USM?
The cheapest flights from IAH to USM are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from IAH to USM?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from IAH to USM. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from George Bush Intercontinental Airport (IAH) to Ko Samui Airport (USM)?
You'll have to take a flight with a layover when traveling from George Bush Intercontinental Airport (IAH) to Ko Samui Airport (USM). There are no daily direct flights 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 IAH to USM?
Usually you'll find the most flight options available on a Friday. Tuesdays tend to be the quietest.* But this can vary depending on the season, carrier 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 George Bush Intercontinental Airport (IAH) to Ko Samui Airport (USM)?
Choose a flight from George Bush Intercontinental Airport (IAH) to Ko Samui Airport (USM) that leaves before 3 PM to reduce the risk of delays and cancellations. Departures after this time are on average 22% more likely to be canceled.**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 George Bush Intercontinental Airport (IAH) to Ko Samui Airport (USM) last-minute?
Waiting until just before your departure to book a ticket from IAH to USM often results in higher prices. While you may find some last-minute discounts, there's no guarantee. Be flexible with your itinerary for a better chance of getting a bargain.
Is it cheaper to book an IAH to USM flight and hotel package?
Compared with arranging flights and hotels separately, booking an IAH to USM flight and hotel package with Expedia could result in significant savings. Better yet, having everything in one easy place will take the stress out of planning your trip. Simply secure your flights and choose from our extensive range of hotels, then personalize your trip with other add-ons like tours and car rentals.
Can I cancel or change the date of my flight from George Bush Intercontinental Airport (IAH) to Ko Samui Airport (USM)?
It's usually possible to reschedule or cancel your IAH to USM flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find further details on our Customer Service portal.

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Houston nearby Airports

Houston

George Bush Intercontinental to Samui Intl. Airport
$881.01
*Available to One Key members.