$714 Cheap Flights from Detroit (DTW) to Samui Intl. Airport (USM)

View $714 flight on Tue, Mar 3, 2026Opens in a new window

Popular airlines from Detroit Metropolitan Wayne County Airport (DTW) to Samui Intl. Airport (USM)

Cheap Flights from Detroit to Samui Intl. Airport (DTW-USM)

Prices were available within the past 7 days and start at $714 for one-way flights and $772 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Mon, Sep 8 - Mon, Sep 15
DTW
Detroit
USM
Koh Samui
$772 Roundtrip, found 6 days ago
$772
Roundtrip
found 6 days ago
Select United flight, departing Mon, Sep 8 from Detroit to Koh Samui, returning Mon, Sep 15, priced at $772 found 6 days ago
United
Mon, Sep 8 - Mon, Sep 15
DTW
Detroit
USM
Koh Samui
$780 Roundtrip, found 6 days ago
$780
Roundtrip
found 6 days ago
Select United flight, departing Mon, Sep 8 from Detroit to Koh Samui, returning Mon, Sep 15, priced at $780 found 6 days ago
United
Mon, Sep 8 - Mon, Sep 15
DTW
Detroit
USM
Koh Samui
$799 Roundtrip, found 6 days ago
$799
Roundtrip
found 6 days ago
Select United flight, departing Mon, Sep 8 from Detroit to Koh Samui, returning Mon, Sep 15, priced at $799 found 6 days ago
United
Mon, Sep 8 - Mon, Sep 15
DTW
Detroit
USM
Koh Samui
$804 Roundtrip, found 6 days ago
$804
Roundtrip
found 6 days ago
Select United flight, departing Mon, Sep 8 from Detroit to Koh Samui, returning Mon, Sep 15, priced at $804 found 6 days ago
United
Mon, Sep 8 - Mon, Sep 15
DTW
Detroit
USM
Koh Samui
$806 Roundtrip, found 6 days ago
$806
Roundtrip
found 6 days ago
Select United flight, departing Mon, Sep 8 from Detroit to Koh Samui, returning Mon, Sep 15, priced at $806 found 6 days ago
United
Mon, Sep 8 - Mon, Sep 15
DTW
Detroit
USM
Koh Samui
$812 Roundtrip, found 6 days ago
$812
Roundtrip
found 6 days ago
Select United flight, departing Mon, Sep 8 from Detroit to Koh Samui, returning Mon, Sep 15, priced at $812 found 6 days ago
Turkish Airlines
Sat, Nov 29 - Wed, Dec 3
DTW
Detroit
USM
Koh Samui
$1,497 Roundtrip, found 4 days ago
$1,497
Roundtrip
found 4 days ago
Select Turkish Airlines flight, departing Sat, Nov 29 from Detroit to Koh Samui, returning Wed, Dec 3, priced at $1,497 found 4 days ago
Cathay Pacific
Mon, Sep 8 - Mon, Sep 15
DTW
Detroit
USM
Koh Samui
$1,613 Roundtrip, found 6 days ago
$1,613
Roundtrip
found 6 days ago
Select Cathay Pacific flight, departing Mon, Sep 8 from Detroit to Koh Samui, returning Mon, Sep 15, priced at $1,613 found 6 days ago
Lufthansa
Sun, Sep 21 - Thu, Oct 9
DTW
Detroit
USM
Koh Samui
$1,671 Roundtrip, found 4 days ago
$1,671
Roundtrip
found 4 days ago
Select Lufthansa flight, departing Sun, Sep 21 from Detroit to Koh Samui, returning Thu, Oct 9, priced at $1,671 found 4 days ago
KLM
Fri, Nov 28 - Sun, Dec 14
DTW
Detroit
USM
Koh Samui
$1,776 Roundtrip, found 4 days ago
$1,776
Roundtrip
found 4 days ago
Select KLM flight, departing Fri, Nov 28 from Detroit to Koh Samui, returning Sun, Dec 14, priced at $1,776 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 $1,820
USM
Samui Intl. Airport
CheapestClosest
Average driving time to city center31 min
Flights from $1,820
Flights from Detroit (DTW) to Samui Intl. Airport (USM)
Origin airport
Detroit Metropolitan Wayne County
Destination airport
Samui Intl. Airport
Roundtrip price
$771
Distance
8852 mi

Detroit to Samui Intl. Airport Flights

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

 

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

Sunday is one of the best days to book for cheap flights from Detroit 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 Detroit 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 Detroit to Samui Intl. Airport in 2025. You can also book with separate airlines for your outbound and return journeys, from $714 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 Detroit 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 Detroit 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 Detroit Metropolitan Wayne County Airport (DTW) to Ko Samui Airport (USM) cost?
Lock in a cheap one-way flight from $714 or cheap return flight from $772 from Detroit Metropolitan Wayne County Airport (DTW) 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 Detroit Metropolitan Wayne County Airport (DTW) to Ko Samui Airport (USM)?
September is the least expensive month to fly from DTW to USM. Traveling during quieter months is often the key to better flight prices.
What is the cheapest airline that flies from Detroit Metropolitan Wayne County Airport (DTW) to Ko Samui Airport (USM)?
To find the cheapest airline that'll fly you from DTW to USM, use Expedia's filter tool. Customize your search based on your travel needs, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Detroit Metropolitan Wayne County Airport (DTW) to Ko Samui Airport (USM)?
You'll have to hop on a flight with a layover if you're traveling from Detroit Metropolitan Wayne County Airport (DTW) to Ko Samui Airport (USM). Direct flights don't operate daily on this route. However, just filter your search to include one or more stops to find the best option for your trip.
What day of the week has the most flights from DTW to USM?
Usually you'll find the most flight options available on a Friday. Tuesdays tend to be the quietest.* However, this can change depending on the season, airline 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 Detroit Metropolitan Wayne County Airport (DTW) to Ko Samui Airport (USM)?
To avoid possible delays on the Detroit Metropolitan Wayne County Airport (DTW) to Ko Samui Airport (USM) route, aim to fly before 3 PM. Later departures have a 22% higher chance of being 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 Detroit Metropolitan Wayne County Airport (DTW) to Ko Samui Airport (USM) last-minute?
Holding off until just before your departure to book a flight from DTW to USM generally means paying more. While you may find some last-minute offers, they aren't always guaranteed. Keep your travel plans flexible to maximize your chances of scoring a bargain.
Is it cheaper to book a DTW to USM flight and hotel package?
You'll generally save money by booking a DTW to USM flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one convenient place. After selecting your ideal flights and accommodations, consider other add-ons like tours, activities and car rentals.
Can I cancel or change the date of my flight from Detroit Metropolitan Wayne County Airport (DTW) to Ko Samui Airport (USM)?
In most cases, you're able to reschedule or cancel your DTW to USM flight. However, there may be additional fees, especially if you made your booking over 24 hours ago. Double-check your itinerary for the airline's fees and guidelines on flight changes, or if you want more information, go to our Customer Service portal.

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*Available to One Key members.