BOS - USM

฿22,458 Find Cheap Flights from Boston to Ko Samui – Compare and Save

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Everything you should know

Cheapest return flight
฿35,339
Typical prices: ฿33,298-฿49,940
Multiple Airlines
Tue 20/2Sat 3/3
BOS - USM • 2 stops
Cheapest one-way flight
฿22,458
Typical prices: ฿25,390-฿26,794
Multiple Airlines
Wed 14/2
BOS - USM • 2 stops
When to travel
February
Cheapest • 12% price drop
February
Most popular
Good to know
+1
Good to know
+1
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We hope you enjoy your trip to Ko Samui!
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Booking Insights
Flight Deals

Cheap Flights from Boston to Ko Samui (BOS-USM)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Boston to Ko Samui

Sat 20 Feb - Wed 3 Mar
Multiple Airlines Logo
15:40 - 08:40BOS  Boston Logan Intl-USM Ko Samui
29h 00m2 stops Abu Dhabi Zayed Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
19:10 - 13:40USM  Ko Samui-BOS Boston Logan Intl
30h 30m2 stops Bangkok Suvarnabhumi Abu Dhabi Zayed Intl
฿35,339Multiple Airlines
Fri 5 Feb - Sat 13 Feb
Multiple Airlines Logo
15:40 - 07:45BOS  Boston Logan Intl-USM Ko Samui
28h 05m2 stops Abu Dhabi Zayed Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
21:30 - 13:40USM  Ko Samui-BOS Boston Logan Intl
28h 10m2 stops Bangkok Suvarnabhumi Abu Dhabi Zayed Intl
฿35,643Multiple Airlines
Fri 26 Mar - Sat 3 Apr
Multiple Airlines Logo
16:40 - 10:45BOS  Boston Logan Intl-USM Ko Samui
31h 05m2 stops Abu Dhabi Zayed Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
09:15 - 14:40USM  Ko Samui-BOS Boston Logan Intl
40h 25m2 stops Bangkok Suvarnabhumi Abu Dhabi Zayed Intl
฿38,947Multiple Airlines
Fri 12 Feb - Sat 20 Feb
Multiple Airlines Logo
15:40 - 06:55BOS  Boston Logan Intl-USM Ko Samui
27h 15m2 stops Abu Dhabi Zayed Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
07:55 - 13:40USM  Ko Samui-BOS Boston Logan Intl
41h 45m2 stops Bangkok Suvarnabhumi Abu Dhabi Zayed Intl
฿38,981Multiple Airlines
Tue 2 Feb - Tue 16 Feb
Multiple Airlines Logo
15:40 - 08:40BOS  Boston Logan Intl-USM Ko Samui
29h 00m2 stops Abu Dhabi Zayed Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
21:30 - 13:40USM  Ko Samui-BOS Boston Logan Intl
28h 10m2 stops Bangkok Suvarnabhumi Abu Dhabi Zayed Intl
฿39,723Multiple Airlines
Sun 28 Mar - Mon 12 Apr
Cathay Pacific Logo
01:45 - 19:40BOS  Boston Logan Intl-USM Ko Samui
30h 55m1 stop Hong Kong Intl
Cathay Pacific Logo
11:55 - 23:05USM  Ko Samui-BOS Boston Logan Intl
22h 10m1 stop Hong Kong Intl
฿39,892Cathay Pacific
Mon 29 Mar - Sun 11 Apr
Cathay Pacific Logo
01:45 - 19:40BOS  Boston Logan Intl-USM Ko Samui
30h 55m1 stop Hong Kong Intl
Cathay Pacific Logo
11:55 - 23:05USM  Ko Samui-BOS Boston Logan Intl
22h 10m1 stop Hong Kong Intl
฿40,195Cathay Pacific
Tue 2 Feb - Tue 16 Feb
Multiple Airlines Logo
15:40 - 10:35BOS  Boston Logan Intl-USM Ko Samui
30h 55m2 stops Abu Dhabi Zayed Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
21:30 - 13:40USM  Ko Samui-BOS Boston Logan Intl
28h 10m2 stops Bangkok Suvarnabhumi Abu Dhabi Zayed Intl
฿40,532Multiple Airlines
Wed 11 Nov - Mon 16 Nov
Cathay Pacific Logo
00:30 - 19:35BOS  Boston Logan Intl-USM Ko Samui
31h 05m1 stop Hong Kong Intl
Cathay Pacific Logo
11:40 - 22:00USM  Ko Samui-BOS Boston Logan Intl
22h 20m1 stop Hong Kong Intl
฿40,937Cathay Pacific
Mon 29 Mar - Mon 12 Apr
Qatar Airways Logo
22:00 - 11:05BOS  Boston Logan Intl-USM Ko Samui
26h 05m2 stops Doha Hamad Intl Bangkok Suvarnabhumi
Qatar Airways Logo
19:45 - 15:15USM  Ko Samui-BOS Boston Logan Intl
30h 30m2 stops Bangkok Suvarnabhumi Doha Hamad Intl
฿41,106Qatar Airways
Booking Insights

Price, demand, and travel trends for Boston to Ko Samui flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights with more confidence.

What's the cheapest day of the week to fly from Boston to Ko Samui?

Based on deals KAYAK users found in the last 12 months, Monday is the cheapest day of the week to fly from Boston to Ko Samui. It's 12% cheaper than the average day, while Saturday is the most expensive, with prices 93% higher.

Find deals

Key details for Boston to Ko Samui flights

Cheapest flight

฿22,458
The most popular month to fly with an average 71% increase in travellers.
One-way flight from Boston to Ko Samui

When to book flights from Boston to Ko Samui

Are your dates flexible? Find out the best times to travel from Boston to Ko Samui based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price

Your Boston to Ko Samui flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines, and booking tips.

  • Do I need a passport to fly from Boston to Ko Samui?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How much should I expect to pay for a Boston to Ko Samui flight?

    Return flights from Boston to Ko Samui range from ฿33,298 to ฿49,940, with an average of ฿37,800 over the past 12 months. Anything below ฿33,298 counts as a good deal.

  • Have flight prices from Boston to Ko Samui changed much recently?

    Yes. Based on fares seen in the past 5 days, return flight prices on this route showed a wide range, from about ฿35,339 to ฿277,957. That means the highest observed fare was about 8x higher than the lowest one.

  • How are flight prices from Boston to Ko Samui looking right now?

    One-way fares from Boston to Ko Samui are currently higher than usual. Average one-way flight prices are about ฿44,781, which is 76% above the typical average for this route.

  • Which car hire options are available at Ko Samui Airport (USM)?

    Ko Samui Airport (USM) hosts 5 major car rental companies, with daily rates starting from around ฿971 for economy cars. Top options include:

    • Drive Car Rental
    • Alamo
    • Sixt
    • Enterprise Rent-A-Car
    • Thai Rent

  • Which airports can I use when flying from Boston to Ko Samui?

    Flights from Boston to Ko Samui usually depart from Boston Logan Intl (BOS) and arrive at Ko Samui (USM).

  • Which airports do connecting flights from Boston to Ko Samui pass through?

    Most connecting flights from Boston to Ko Samui pass through Hong Kong Intl (HKG), which handles 100% of one-stop traffic on this route.

  • Can I save money by using flexible dates for flights from Boston to Ko Samui?

    Yes. Flexible dates can save you up to 55% on flights from Boston to Ko Samui. Monday is the cheapest departure day at ฿33,282 return on average, while Saturday is the most expensive at ฿73,275, a difference of ฿39,993.

    KAYAK's flexible dates feature shows options up to three days before and after your selected dates, making it easier to compare nearby fares.

  • What is the time difference between Boston and Ko Samui?

    Ko Samui is 11 hours ahead of Boston (Indochina Time vs Eastern Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in Ko Samui?

    Some of the most popular sights in Ko Samui are Chaweng Beach, Lamai Beach, and Bophut Beach. These are among the most viewed places in Ko Samui on KAYAK.

Your guide to booking Boston to Ko Samui flights

Get tips on when to book, when to fly, and what to know before your trip.
  • If your dates are flexible, aim for a Monday departure and avoid flying on Saturday. On this route, Monday flights average ฿33,282, which is about ฿39,993 less than Saturday fares (55% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Boston to Ko Samui trip for February. Fares historically average ฿33,282 return in that month – typically ฿39,993 less than the most expensive month, which is December (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Ko Samui Airport.

    • Ozo Chaweng Samui - Sha Extra Plus
    • Melia Koh Samui
    • Royal Muang Samui Villas

More options for your flight from Boston to Ko Samui

Complete your trip to Ko Samui with a hotel stay or car hire

Car rentals in Ko Samui
Hotels in Ko Samui