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Ko Samui

$822+ 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 7/2. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — USM
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$1,146
(Trip.com)

One-way from

$822
(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 June 12, 2025.

This Gotogate deal was found by Cheapflights users on 6/10. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/111:20 pmBOS - USM
2 stops32h 15mJapan Airlines
Sun 9/217:00 amUSM - BOS
2 stops46h 05mJapan Airlines
Deal found 6/10$982
This Trip.com deal was found by Cheapflights users on 6/10. 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 9/101:40 amBOS - USM
2 stops47h 15mMultiple Airlines
Sun 9/218:00 amUSM - BOS
2 stops50h 00mMultiple Airlines
Deal found 6/10$1,146
This Gurufare deal was found by Cheapflights users on 6/10. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/101:40 amBOS - USM
1 stop29h 55mCathay Pacific
Sun 9/219:15 amUSM - BOS
2 stops24h 45mCathay Pacific
Deal found 6/10$1,542
This FlightHub deal was found by Cheapflights users on 6/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/210:00 pmBOS - USM
2 stops25h 30mQatar Airways
Sat 7/197:00 pmUSM - BOS
2 stops55h 05mQatar Airways
Deal found 6/10$1,762
This KAYAK deal was found by Cheapflights users on 6/10. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/264:10 pmBOS - USM
2 stops27h 00mEtihad Airways
Sun 1/46:15 pmUSM - BOS
2 stops32h 25mEtihad Airways
Deal found 6/10$2,004
This Gurufare deal was found by Cheapflights users on 6/11. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/149:55 amBOS - USM
2 stops44h 20mSingapore Airlines
Sun 11/304:25 pmUSM - BOS
3 stops35h 55mSingapore Airlines
Deal found 6/11$2,192

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 June 12, 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

Wed 9/10

1:40 am-11:55 am

2 stops47h 15m

Ko Samui

Sun 9/21

8:00 am-11:00 pm

2 stops50h 00m

$1,146

BostonKo Samui

BOS - USM

BOSUSM

Boston Logan Intl

Wed 9/10

1:40 am-6:35 pm

1 stop29h 55m

Ko Samui

Sun 9/21

9:15 am-11:00 pm

2 stops24h 45m

$1,542

BostonKo Samui

BOS - USM

BOSUSM

Boston Logan Intl

Wed 7/2

10:00 pm-10:30 am

2 stops25h 30m

Ko Samui

Sat 7/19

7:00 pm-3:05 pm

2 stops55h 05m

$1,762

BostonKo Samui

BOS - USM

BOSUSM

Boston Logan Intl

Wed 8/6

6:10 pm-6:15 pm

2 stops37h 05m

Ko Samui

Tue 8/12

4:25 pm-4:13 pm

3 stops34h 48m

$3,073

BostonKo Samui

BOS - USM

BOSUSM

Boston Logan Intl

Wed 7/2

12:55 pm-8:25 pm

3 stops44h 30m

$822

BostonKo Samui

BOS - USM

BOSUSM

Boston Logan Intl

Sun 8/3

10:00 pm-10:30 am

2 stops49h 30m

$989

BostonKo Samui

BOS - USM

BOSUSM

Boston Logan Intl

Sat 8/2

1:40 am-6:35 pm

1 stop29h 55m

$1,573

BostonKo Samui

BOS - USM

BOSUSM

Boston Logan Intl

Fri 6/27

1:45 pm-6:15 pm

3 stops41h 30m

$2,930

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

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 June 12, 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.

Rainfall in Ko Samui by month

Plan your trip to Ko Samui by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ko Samui ranges from 2.3 - 19.3 inches per month. November is typically the wettest month, when rainfall can reach 19.3 in. February is typically the driest time to visit Ko Samui when rainfall is around 2.3 in.

Temperature in Ko Samui by month

Plan your trip to Ko Samui by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ko Samui, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 80.6 F).

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 June 12, 2025.
Singapore Airlines
8.1
Very good
1,302 reviews

Crew

8.6

Overall

8.1

Food

7.7

Comfort

7.9

Entertainment

8.0

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.
Singapore Airlines
8.1
Very good
1,302 reviews
Singapore Airlines
8.1
Very good
1,302 reviews

Crew

8.6

Overall

8.1

Food

7.7

Comfort

7.9

Entertainment

8.0

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.
Cathay Pacific
7.6
Good
892 reviews
Singapore Airlines
8.1
Very good
1,302 reviews

Crew

8.6

Overall

8.1

Food

7.7

Comfort

7.9

Entertainment

8.0

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.
Qatar Airways
7.4
Good
3,584 reviews
Singapore Airlines
8.1
Very good
1,302 reviews

Crew

8.6

Overall

8.1

Food

7.7

Comfort

7.9

Entertainment

8.0

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.

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.

  • What are the cheapest airlines to fly from Boston to Ko Samui one-way?

    The cheapest airlines for a one-way flight from Boston to Ko Samui are Qatar Airways ($989), Cathay Pacific ($1,573), and Singapore Airlines ($2,930).

  • 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 Boston?

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

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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qatar AirwaysCheapest$1,778Average$1,836FlexibilityNo cancel feeOn-time68%

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