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Ko Samui

$564+ Cheap flights from Boston (BOS) to Ko Samui (USM)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — USM
Aug 25 — Sep 11
Mon 8/25
Mon 9/1
1 adult, Economy
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Cheap flight deals from Boston to Ko Samui

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Ko Samui (USM). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 20, 2025.

Round-trip from

$1,002
(Trip.com)

One-way from

$564
(Kiwi.com)
From Boston Logan Intl to Ko Samui
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One-way flight from Boston Logan Intl to Ko Samui
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Find flight deals from Boston to Ko Samui

Cheapest flights from Boston to Ko Samui
Explore the most affordable flight options available from Boston to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 20, 2025.

This Trip.com deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/712:05 pmBOS - USM
2 stops31h 05mMultiple Airlines
Fri 12/129:20 amUSM - BOS
2 stops43h 45mMultiple Airlines
Deal found 8/18$1,002
This Trip.com deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1912:30 amBOS - USM
2 stops42h 40mMultiple Airlines
Tue 12/27:00 amUSM - BOS
2 stops27h 00mMultiple Airlines
Deal found 8/19$1,017
This IEagle deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure IEagle is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/203:40 pmBOS - USM
2 stops30h 55mEtihad Airways
Tue 12/27:30 pmUSM - BOS
2 stops31h 10mEtihad Airways
Deal found 8/19$1,269
This oojo deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/39:35 pmBOS - USM
2 stops36h 35mMultiple Airlines
Fri 10/107:00 pmUSM - BOS
2 stops35h 40mMultiple Airlines
Deal found 8/19$1,283
This Turkish Airlines deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/189:35 pmBOS - USM
2 stops24h 45mTurkish Airlines
Mon 9/228:50 pmUSM - BOS
2 stops33h 50mTurkish Airlines
Deal found 8/17$1,304
This Cathay Pacific deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/171:40 amBOS - USM
1 stop29h 55mCathay Pacific
Mon 9/2210:55 amUSM - BOS
1 stop23h 05mCathay Pacific
Deal found 8/17$1,547

Cheapflights Fare Finder

 
Customize your flight search to find flights from Boston to Ko Samui that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 20, 2025.
Use the filters below to find and compare flights from Boston to Ko Samui that are best for you.

Fly from

Boston

Fly to

Ko Samui

Route

Depart

Return

Price

BostonKo Samui

BOS - USM

BOSUSM

Boston Logan Intl

Fri 10/3

9:35 pm-9:10 pm

2 stops36h 35m

Ko Samui

Fri 10/10

7:00 pm-7:40 pm

2 stops35h 40m

$1,283

BostonKo Samui

BOS - USM

BOSUSM

Boston Logan Intl

Thu 9/18

9:35 pm-9:20 am

2 stops24h 45m

Ko Samui

Mon 9/22

8:50 pm-7:40 pm

2 stops33h 50m

$1,304

BostonKo Samui

BOS - USM

BOSUSM

Boston Logan Intl

Wed 9/17

1:40 am-6:35 pm

1 stop29h 55m

Ko Samui

Mon 9/22

10:55 am-11:00 pm

1 stop23h 05m

$1,547

BostonKo Samui

BOS - USM

BOSUSM

Boston Logan Intl

Thu 10/2

1:40 am-6:35 pm

1 stop29h 55m

Ko Samui

Fri 10/10

10:55 am-11:00 pm

1 stop23h 05m

$1,795

BostonKo Samui

BOS - USM

BOSUSM

Boston Logan Intl

Wed 9/10

7:20 am-8:50 pm

3 stops50h 30m

$564

BostonKo Samui

BOS - USM

BOSUSM

Boston Logan Intl

Wed 9/10

9:35 pm-8:50 pm

2 stops36h 15m

$634

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/18

The best insider tips for Boston to Ko Samui flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Boston to Ko Samui trip
Airlines
Southwest

Enjoy free snacks and non-alcoholic drinks, plus a free drink on special occasions.


Southwest offers two free checked bags, including oversized items like skis or golf clubs.

Read more about Southwestby Marisa Garcia
Spirit Airlines

Spirit's Big Front Seats offer 11 inches more legroom and larger tray tables.


Use Spirit's Bag-O-Tron tool to compare baggage costs and save money.

Read more about Spirit Airlinesby Daniel Scheffler
Our travel experts
Marisa Garcia

Marisa Garcia

Expert on Southwest

Marisa Garcia

Marisa Garcia

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialized in airline interiors and regulations. Ten years ago, she pivoted to journalism. She shares her insights in leading aviation, travel, and business publications and on her site FlightChic.

Read more
Daniel Scheffler

Daniel Scheffler

Expert on Spirit Airlines

Daniel Scheffler

Daniel Scheffler

Daniel Scheffler is a travel writer, podcaster, and producer. Born in Africa, bred in Europe and now living in America he has traveled to 140 countries (and all 50 U.S. states). Plus he has stayed at over 2500 hotels across the globe. His original shows Everywhere and Without Maps (available on Spotify) showcase his beliefs, travel is about humanity and sharing that beauty. And thus it reminds you that you shouldn’t believe everything you think.

Read more

Best time to book a flight from Boston to Ko Samui

Have a flexible travel schedule? Discover the best time to fly to Ko Samui from Boston with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Boston to Ko Samui

What is the cheapest time of day to fly from BOS to USM?

Find hourly flight availability from Boston to Ko Samui. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 20, 2025.

A simple way to save on the total cost of your ticket is to fly from Boston to Ko Samui at noon. If you’re flexible enough to do this you can expect to save up to 37% on your trip compared to booking a flight in the evening.

What is the cheapest day to fly from Boston to Ko Samui?

Use this chart to determine the cheapest time to fly round-trip from Boston to Ko Samui. Price data was last updated on March 30, 2025.

Travelers seeking maximum savings on their Boston to Ko Samui flight should consider departing on Wednesday evenings when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Ko Samui

Get insights into the airlines that provide service to Ko Samui. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ko Samui. Reviews last updated August 20, 2025.
See what other customers who have flown with Qatar Airways from Boston to Ko Samui have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Qatar Airways
7.4
Good
3,611 reviews

Overall

7.4

Comfort

7.4

Boarding

7.5

Crew

7.9

Entertainment

7.4

Food

7.3

Reviews

1 / 20
6.0
Good

Chris,Jul 2025

DFW - DOH

Too crammed for the amount you have to pay. That was very uncomfortable
Qatar Airways
7.4
Good
3,611 reviews
Qatar Airways
7.4
Good
3,611 reviews

Overall

7.4

Comfort

7.4

Boarding

7.5

Crew

7.9

Entertainment

7.4

Food

7.3

Reviews

1 / 20
6.0
Good

Chris,Jul 2025

DFW - DOH

Too crammed for the amount you have to pay. That was very uncomfortable

Related info for your journey

Find useful and relevant information for your journey from Boston to Ko Samui. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Boston to Ko Samui?

    Departing from Boston to Ko Samui will take you 24h 45m. Boston and Ko Samui are separated by a distance of 8799 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • Can I find deals for flights from Boston to Ko Samui that include hotel bookings?

    Yes. In addition to deals on Boston to Ko Samui flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Boston to Ko Samui?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to Ko Samui.

  • Can I find deals for business class flights from Boston to Ko Samui?

    Yes. Cheapflights offers flight deals from Boston to Ko Samui by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near Ko Samui?

Book flights to Ko Samui if you plan to visit one of these locations
Ko Tao
Ko Pha Ngan

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Boston to Ko Samui

Discover the top airline that operate flights from Boston to Ko Samui. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qatar AirwaysCheapest$1,778Average$1,959FlexibilityNo cancel feeOn-time68%

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