One Way

Popular Filters

One Way Price

THB 24,469 THB 76,000

Duration

23 h 5 m 56 h 0 m

Stops From Boston

Departure From Boston

Before 6 AM

THB 35,950

6 AM - 12 PM

THB 45,252

12 PM - 6 PM

THB 24,469

After 6 PM

THB 39,084

Arrival at Koh Samui

6 AM - 12 PM

THB 24,469

12 PM - 6 PM

THB 39,212

After 6 PM

THB 31,448

Alliances & Airlines

Oneworld

(6)

SkyTeam

()

Star Alliance

(10)

+ 1 more

Layover Airports

+ 4 more

Layover Duration

3 h 10 m 34 h 30 m

Sorted By:
Departure
Duration
Arrival
Price
Price last updated at 16 Jul 2026 20:09:39
Etihad Airways, Bangkok Airways

THB 24,469

View Flight Details

Boston to Koh Samui , 19 Jul

Etihad Airways EY | 8

16:40

Sun, 19 Jul 26

Terminal C

Boston, United States

12 h 20 m

13:00

Mon, 20 Jul 26

Terminal A

Abu Dhabi, United Arab Emirates

BAGGAGE : CHECK INCABIN

Information not available

Etihad Airways EY | 412

08:35

Tue, 21 Jul 26

Terminal A

Abu Dhabi, United Arab Emirates

06 h 45 m

18:20

Tue, 21 Jul 26

Terminal I

Phuket, Thailand

BAGGAGE : CHECK INCABIN

Information not available

Bangkok Airways PG | 408

07:30

Wed, 22 Jul 26

Terminal D

Phuket, Thailand

55 m

08:25

Wed, 22 Jul 26

Koh Samui, Thailand

BAGGAGE : CHECK INCABIN

Information not available

Etihad Airways, Bangkok Airways

THB 31,448

View Flight Details

Boston to Koh Samui , 19 Jul

Etihad Airways EY | 8

16:40

Sun, 19 Jul 26

Terminal C

Boston, United States

12 h 20 m

13:00

Mon, 20 Jul 26

Terminal A

Abu Dhabi, United Arab Emirates

BAGGAGE : CHECK INCABIN

Information not available

Etihad Airways EY | 870

21:10

Mon, 20 Jul 26

Terminal A

Abu Dhabi, United Arab Emirates

07 h 50 m

09:00

Tue, 21 Jul 26

Terminal T1

Hong Kong, Hong Kong

BAGGAGE : CHECK INCABIN

Information not available

Bangkok Airways PG | 806

17:20

Tue, 21 Jul 26

Terminal T2

Hong Kong, Hong Kong

03 h 20 m

19:40

Tue, 21 Jul 26

Koh Samui, Thailand

BAGGAGE : CHECK INCABIN

Information not available

Japan Airlines, Bangkok Airways

THB 33,793

Transit Visa may be required

View Flight Details

Boston to Koh Samui , 19 Jul

Japan Airlines JL | 7

13:15

Sun, 19 Jul 26

Terminal E

Boston, United States

13 h 45 m

16:00

Mon, 20 Jul 26

Terminal T2

Tokyo - Narita Apt, Japan

BAGGAGE : CHECK INCABIN

Information not available

Japan Airlines JL | 31

10:40

Tue, 21 Jul 26

Terminal T3

Tokyo-Haneda Airport, Japan

06 h 30 m

15:10

Tue, 21 Jul 26

Bangkok, Thailand

BAGGAGE : CHECK INCABIN

Information not available

Bangkok Airways PG | 1199

06:40

Wed, 22 Jul 26

Bangkok, Thailand

01 h 05 m

07:45

Wed, 22 Jul 26

Koh Samui, Thailand

BAGGAGE : CHECK INCABIN

Information not available

Cathay Pacific, Bangkok Airways

THB 37,446

THB 35,950

Transit Visa may be required

View Flight Details

Boston to Koh Samui , 19 Jul

Cathay Pacific CX | 811

01:45

Sun, 19 Jul 26

Terminal E

Boston, United States

15 h 15 m

05:00

Mon, 20 Jul 26

Terminal T1

Hong Kong, Hong Kong

BAGGAGE : CHECK INCABIN

Information not available

Cathay Pacific CX | 705

08:00

Mon, 20 Jul 26

Terminal T1

Hong Kong, Hong Kong

03 h

10:00

Mon, 20 Jul 26

Bangkok, Thailand

BAGGAGE : CHECK INCABIN

Information not available

Bangkok Airways PG | 103

06:25

Tue, 21 Jul 26

Bangkok, Thailand

01 h 05 m

07:30

Tue, 21 Jul 26

Koh Samui, Thailand

BAGGAGE : CHECK INCABIN

Information not available

Qatar Airways, Bangkok Airways

THB 39,084

View Flight Details

Boston to Koh Samui , 19 Jul

Qatar Airways QR | 744

22:00

Sun, 19 Jul 26

Terminal E

Boston, United States

12 h 25 m

17:25

Mon, 20 Jul 26

Doha, Qatar

BAGGAGE : CHECK INCABIN

Information not available

Qatar Airways QR | 826

08:30

Tue, 21 Jul 26

Doha, Qatar

06 h 55 m

19:25

Tue, 21 Jul 26

Bangkok, Thailand

BAGGAGE : CHECK INCABIN

Information not available

Bangkok Airways PG | 103

06:25

Wed, 22 Jul 26

Bangkok, Thailand

01 h 05 m

07:30

Wed, 22 Jul 26

Koh Samui, Thailand

BAGGAGE : CHECK INCABIN

Information not available

Qatar Airways, Bangkok Airways

THB 39,212

View Flight Details

Boston to Koh Samui , 19 Jul

Qatar Airways QR | 744

22:00

Sun, 19 Jul 26

Terminal E

Boston, United States

12 h 25 m

17:25

Mon, 20 Jul 26

Doha, Qatar

BAGGAGE : CHECK INCABIN

Information not available

Qatar Airways QR | 826

08:30

Tue, 21 Jul 26

Doha, Qatar

06 h 55 m

19:25

Tue, 21 Jul 26

Bangkok, Thailand

BAGGAGE : CHECK INCABIN

Information not available

Bangkok Airways PG | 135

13:40

Wed, 22 Jul 26

Bangkok, Thailand

01 h 05 m

14:45

Wed, 22 Jul 26

Koh Samui, Thailand

BAGGAGE : CHECK INCABIN

Information not available

Qatar Airways

THB 42,443

THB 40,747

Transit Visa may be required

View Flight Details

Boston to Koh Samui , 19 Jul

Qatar Airways QR | 744

22:00

Sun, 19 Jul 26

Terminal E

Boston, United States

12 h 25 m

17:25

Mon, 20 Jul 26

Doha, Qatar

BAGGAGE : CHECK INCABIN

Information not available

Qatar Airways QR | 818

01:45

Tue, 21 Jul 26

Doha, Qatar

08 h 25 m

15:10

Tue, 21 Jul 26

Terminal T1

Hong Kong, Hong Kong

BAGGAGE : CHECK INCABIN

Information not available

Qatar Airways QR | 4440 | Operated By Bangkok Airways

17:20

Tue, 21 Jul 26

Terminal T2

Hong Kong, Hong Kong

03 h 20 m

19:40

Tue, 21 Jul 26

Koh Samui, Thailand

BAGGAGE : CHECK INCABIN

Information not available

United Airlines, Bangkok Airways

THB 43,162

Transit Visa may be required

View Flight Details

Boston to Koh Samui , 19 Jul

United Airlines UA | 2107

20:20

Sun, 19 Jul 26

Terminal B

Boston, United States

06 h 37 m

23:57

Sun, 19 Jul 26

Terminal T3

San Francisco, United States

BAGGAGE : CHECK INCABIN

Information not available

United Airlines UA | 29

11:10

Mon, 20 Jul 26

Terminal I

San Francisco, United States

16 h 25 m

18:35

Tue, 21 Jul 26

Terminal T2

Singapore, Singapore

BAGGAGE : CHECK INCABIN

Information not available

Bangkok Airways PG | 962

20:15

Tue, 21 Jul 26

Terminal T1

Singapore, Singapore

01 h 55 m

21:10

Tue, 21 Jul 26

Koh Samui, Thailand

BAGGAGE : CHECK INCABIN

Information not available

United Airlines, Bangkok Airways

THB 43,354

Transit Visa may be required

View Flight Details

Boston to Koh Samui , 19 Jul

United Airlines UA | 512

16:15

Sun, 19 Jul 26

Terminal B

Boston, United States

06 h 34 m

19:49

Sun, 19 Jul 26

Terminal T3

San Francisco, United States

BAGGAGE : CHECK INCABIN

Information not available

United Airlines UA | 29

11:10

Mon, 20 Jul 26

Terminal I

San Francisco, United States

16 h 25 m

18:35

Tue, 21 Jul 26

Terminal T2

Singapore, Singapore

BAGGAGE : CHECK INCABIN

Information not available

Bangkok Airways PG | 962

20:15

Tue, 21 Jul 26

Terminal T1

Singapore, Singapore

01 h 55 m

21:10

Tue, 21 Jul 26

Koh Samui, Thailand

BAGGAGE : CHECK INCABIN

Information not available

United Airlines, Bangkok Airways

THB 45,252

Transit Visa may be required

View Flight Details

Boston to Koh Samui , 19 Jul

United Airlines UA | 2441

06:00

Sun, 19 Jul 26

Terminal B

Boston, United States

06 h 27 m

09:27

Sun, 19 Jul 26

Terminal T3

San Francisco, United States

BAGGAGE : CHECK INCABIN

Information not available

United Airlines UA | 29

11:10

Sun, 19 Jul 26

Terminal I

San Francisco, United States

16 h 25 m

18:35

Mon, 20 Jul 26

Terminal T2

Singapore, Singapore

BAGGAGE : CHECK INCABIN

Information not available

Bangkok Airways PG | 962

20:15

Mon, 20 Jul 26

Terminal T1

Singapore, Singapore

01 h 55 m

21:10

Mon, 20 Jul 26

Koh Samui, Thailand

BAGGAGE : CHECK INCABIN

Information not available