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Cheap flights from Boston to Ko Samui from $645

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Boston to Ko Samui departing on 11/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Boston to Ko Samui

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
4:40 pm - 7:10 amBOS  Boston Logan Intl-USM Ko Samui
27h 30m2 stops Abu Dhabi Zayed Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
5:05 pm - 2:10 pmUSM  Ko Samui-BOS Boston Logan Intl
33h 05m2 stops Bangkok Suvarnabhumi Abu Dhabi Zayed Intl
$1,013Multiple Airlines
Wed, Oct 28 - Tue, Nov 10
Multiple Airlines Logo
4:25 pm - 7:10 amBOS  Boston Logan Intl-USM Ko Samui
27h 45m2 stops Abu Dhabi Zayed Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
10:00 am - 3:10 pmUSM  Ko Samui-BOS Boston Logan Intl
40h 10m2 stops Bangkok Suvarnabhumi Abu Dhabi Zayed Intl
$1,014Multiple Airlines
Sat, Oct 10 - Sun, Nov 1
Multiple Airlines Logo
4:40 pm - 7:10 amBOS  Boston Logan Intl-USM Ko Samui
27h 30m2 stops Abu Dhabi Zayed Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
5:05 pm - 2:10 pmUSM  Ko Samui-BOS Boston Logan Intl
33h 05m2 stops Bangkok Suvarnabhumi Abu Dhabi Zayed Intl
$1,019Multiple Airlines
Wed, Oct 28 - Tue, Nov 10
Multiple Airlines Logo
4:40 pm - 7:35 amBOS  Boston Logan Intl-USM Ko Samui
27h 55m2 stops Abu Dhabi Zayed Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
8:00 am - 2:40 pmUSM  Ko Samui-BOS Boston Logan Intl
41h 40m2 stops Phuket City Abu Dhabi Zayed Intl
$1,022Multiple Airlines
Tue, Sep 22 - Thu, Oct 1
Multiple Airlines Logo
4:40 pm - 7:35 amBOS  Boston Logan Intl-USM Ko Samui
27h 55m2 stops Abu Dhabi Zayed Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
8:00 am - 2:40 pmUSM  Ko Samui-BOS Boston Logan Intl
41h 40m2 stops Phuket City Abu Dhabi Zayed Intl
$1,028Multiple Airlines
Tue, Sep 22 - Thu, Oct 1
Multiple Airlines Logo
3:40 pm - 10:40 amBOS  Boston Logan Intl-USM Ko Samui
31h 00m2 stops Abu Dhabi Zayed Intl Phuket City
Multiple Airlines Logo
5:40 pm - 2:10 pmUSM  Ko Samui-BOS Boston Logan Intl
32h 30m2 stops Bangkok Suvarnabhumi Abu Dhabi Zayed Intl
$1,057Multiple Airlines
Tue, Nov 3 - Mon, Nov 16
Multiple Airlines Logo
3:40 pm - 7:10 amBOS  Boston Logan Intl-USM Ko Samui
51h 30m2 stops Abu Dhabi Zayed Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
7:00 am - 2:10 pmUSM  Ko Samui-BOS Boston Logan Intl
43h 10m2 stops Bangkok Suvarnabhumi Abu Dhabi Zayed Intl
$1,093Multiple Airlines
Sat, Jan 30 - Thu, Feb 11
Multiple Airlines Logo
3:40 pm - 9:20 amBOS  Boston Logan Intl-USM Ko Samui
29h 40m2 stops Abu Dhabi Zayed Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
5:05 pm - 2:10 pmUSM  Ko Samui-BOS Boston Logan Intl
33h 05m2 stops Bangkok Suvarnabhumi Abu Dhabi Zayed Intl
$1,169Multiple Airlines
Sun, Nov 1 - Sat, Nov 14
Etihad Airways Logo
4:25 pm - 8:15 amBOS  Boston Logan Intl-USM Ko Samui
28h 50m2 stops Abu Dhabi Zayed Intl Bangkok Suvarnabhumi
Etihad Airways Logo
6:15 pm - 2:10 pmUSM  Ko Samui-BOS Boston Logan Intl
31h 55m2 stops Phuket City Abu Dhabi Zayed Intl
$1,190Etihad Airways
Sun, Oct 11 - Mon, Nov 2
Etihad Airways Logo
4:25 pm - 7:10 amBOS  Boston Logan Intl-USM Ko Samui
27h 45m2 stops Abu Dhabi Zayed Intl Bangkok Suvarnabhumi
Etihad Airways Logo
7:00 pm - 2:10 pmUSM  Ko Samui-BOS Boston Logan Intl
31h 10m2 stops Bangkok Suvarnabhumi Abu Dhabi Zayed Intl
$1,213Etihad Airways
Tue, Oct 13 - Wed, Nov 4

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Etihad Airways flights from Boston to Ko Samui

Our best Etihad Airways deals on Boston to Ko Samui flight tickets
Etihad Airways
Oct 11
BOS4:25 pmBoston Logan Intl
28h 50m
2 stops
USM8:15 amKo Samui
Nov 2
USM6:15 pmKo Samui
31h 55m
2 stops
BOS2:10 pmBoston Logan Intl
$1,190
Etihad Airways
Oct 7
BOS4:25 pmBoston Logan Intl
27h 45m
2 stops
USM7:10 amKo Samui
Nov 3
USM3:50 pmKo Samui
34h 20m
2 stops
BOS2:10 pmBoston Logan Intl
$1,213
Etihad Airways
Oct 9
BOS4:25 pmBoston Logan Intl
27h 45m
2 stops
USM7:10 amKo Samui
Nov 2
USM6:15 pmKo Samui
31h 55m
2 stops
BOS2:10 pmBoston Logan Intl
$1,230

SWISS flights from Boston to Ko Samui

Our best SWISS deals on Boston to Ko Samui flight tickets
SWISS
Oct 11
BOS9:40 pmBoston Logan Intl
28h 30m
2 stops
USM1:10 pmKo Samui
Oct 30
USM6:15 pmKo Samui
62h 05m
2 stops
BOS9:20 pmBoston Logan Intl
$1,309
SWISS
Oct 11
BOS9:40 pmBoston Logan Intl
28h 30m
2 stops
USM1:10 pmKo Samui
Oct 29
USM4:25 pmKo Samui
39h 55m
2 stops
BOS9:20 pmBoston Logan Intl
$1,374

momondo 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, momondo users made 832,500 searches. Data last updated August 9, 2026.
Use the filters below to find and compare flights from Boston to Ko Samui that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonKo Samui

BOS Boston Logan Intl - USM Ko Samui

BOSUSM

Boston Logan Intl

Wed 10/28

4:40 pm-7:10 am

2 stops27h 30m

Ko Samui

Tue 11/10

5:05 pm-2:10 pm

2 stops33h 05m

$1,013

BostonKo Samui

BOS Boston Logan Intl - USM Ko Samui

BOSUSM

Boston Logan Intl

Sat 10/10

4:25 pm-7:10 am

2 stops27h 45m

Ko Samui

Sun 11/1

10:00 am-3:10 pm

2 stops40h 10m

$1,014

BostonKo Samui

BOS Boston Logan Intl - USM Ko Samui

BOSUSM

Boston Logan Intl

Wed 10/28

4:40 pm-7:10 am

2 stops27h 30m

Ko Samui

Tue 11/10

5:05 pm-2:10 pm

2 stops33h 05m

$1,019

BostonKo Samui

BOS Boston Logan Intl - USM Ko Samui

BOSUSM

Boston Logan Intl

Tue 9/22

4:40 pm-7:35 am

2 stops27h 55m

Ko Samui

Thu 10/1

8:00 am-2:40 pm

2 stops41h 40m

$1,022

BostonKo Samui

BOS Boston Logan Intl - USM Ko Samui

BOSUSM

Boston Logan Intl

Tue 9/22

4:40 pm-7:35 am

2 stops27h 55m

Ko Samui

Thu 10/1

8:00 am-2:40 pm

2 stops41h 40m

$1,028

BostonKo Samui

BOS Boston Logan Intl - USM Ko Samui

BOSUSM

Boston Logan Intl

Tue 11/3

3:40 pm-10:40 am

2 stops31h 00m

Ko Samui

Mon 11/16

5:40 pm-2:10 pm

2 stops32h 30m

$1,057

BostonKo Samui

BOS Boston Logan Intl - USM Ko Samui

BOSUSM

Boston Logan Intl

Sat 1/30

3:40 pm-7:10 am

2 stops51h 30m

Ko Samui

Thu 2/11

7:00 am-2:10 pm

2 stops43h 10m

$1,093

BostonKo Samui

BOS Boston Logan Intl - USM Ko Samui

BOSUSM

Boston Logan Intl

Sun 11/1

3:40 pm-9:20 am

2 stops29h 40m

Ko Samui

Sat 11/14

5:05 pm-2:10 pm

2 stops33h 05m

$1,169

BostonKo Samui

BOS Boston Logan Intl - USM Ko Samui

BOSUSM

Boston Logan Intl

Sun 10/11

4:25 pm-8:15 am

2 stops28h 50m

Ko Samui

Mon 11/2

6:15 pm-2:10 pm

2 stops31h 55m

$1,190
Quickest round-trip

BostonKo Samui

BOS Boston Logan Intl - USM Ko Samui

BOSUSM

Boston Logan Intl

Tue 10/13

4:25 pm-7:10 am

2 stops27h 45m

Ko Samui

Wed 11/4

7:00 pm-2:10 pm

2 stops31h 10m

$1,213

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Boston to Ko Samui

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Can stopping save me money on Boston to Ko Samui flights?

You could potentially save up to 47% on your flight if you consider stops on a Boston to Ko Samui flight.

When to book flights from Boston to Ko Samui

Are you open to changing your travel dates? Check out the ideal times to fly from Boston to Ko Samui according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Boston to Ko Samui (BOS to USM) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Boston to Ko Samui

Fastest flight time

27h 55m

Direct flights

None
The fastest flight from Boston to Ko Samui takes 27h 55m
There are no direct flights from Boston to Ko Samui. There are no popular flight routes from Boston to Ko Samui.
Search flight deals

Frequently asked questions about flying from Boston to Ko Samui

  • How far is Boston Logan Intl to Ko Samui by plane?

    The distance between Boston Logan Intl and Ko Samui is about 8802.1 mi. By plane, this route typically takes 27h 55m.

  • When did momondo last update prices for flights from Boston Logan Intl Airport to Ko Samui Airport?

    Prices for flights from Boston Logan Intl Airport to Ko Samui Airport are updated daily.

  • How old do you have to be to fly from Boston Logan Intl Airport to Ko Samui Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Boston Logan Intl Airport to Ko Samui Airport.

  • What documentation or ID do you need to fly to Ko Samui Airport?

    The travel and health documents you'll need for your trip to Ko Samui Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ko Samui Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Traveling to a place near Ko Samui?

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

Why use momondo?

Why should I use momondo to find a flight deal from Boston to Ko Samui?

Finding the right flight to Ko Samui from Boston is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Ko Samui quick and easy, saving you time and money.

Can I find flights from Boston to Ko Samui with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Boston to Ko Samui flights to just show those with flexible booking policies.

How can momondo help me find flights from Boston to Ko Samui?

momondo provides multiple filters to help you find the best flight to Ko Samui from Boston. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Boston to Ko Samui right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Ko Samui from Boston. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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