$1,093+ Cheap flights from Maryland to Ko Samui (USM)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/4. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from Maryland to Ko Samui with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Maryland to Ko Samui
Cheapest flights from Maryland to Ko SamuiExplore the most affordable flight options available from Maryland to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 15, 2025.
Explore the most affordable flight options available from Maryland to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 15, 2025.
This Gotogate deal was found by Cheapflights users on 12/13. 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.
This oojo deal was found by Cheapflights users on 12/13. 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.
This oojo deal was found by Cheapflights users on 12/13. 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.
This Gotogate deal was found by Cheapflights users on 12/13. 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.
Find flight deals from Maryland to Ko Samui
Keep the following information in mind while searching for Maryland to Ko Samui flight deals. Data was last updated December 15, 2025.
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $1,093 (oojo) |
Cheapflights Fare Finder
Use the filters below to find and compare flights from Maryland to Ko Samui that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
Washington, D.C.Ko Samui
IAD - USM
IADUSM
Washington, D.C. Dulles Intl
Wed 3/4
2:35 pm-7:45 am
2 stops29h 10m
Ko Samui
Wed 3/11
8:50 am-10:05 am
2 stops60h 15m
Washington, D.C.Ko Samui
IAD - USM
IADUSM
Washington, D.C. Dulles Intl
Tue 1/27
2:35 pm-7:45 am
2 stops29h 10m
Ko Samui
Tue 2/3
8:15 am-9:05 am
2 stops36h 50m
Washington, D.C.Ko Samui
DCA - USM
DCAUSM
Washington, D.C. Reagan-National
Wed 3/4
9:59 am-7:35 pm
2 stops45h 36m
Ko Samui
Wed 3/11
11:40 am-8:01 am
2 stops31h 21m
Washington, D.C.Ko Samui
IAD - USM
IADUSM
Washington, D.C. Dulles Intl
Wed 3/4
2:35 pm-8:05 am
2 stops29h 30m
Ko Samui
Wed 3/11
12:00 pm-10:05 am
3 stops33h 05m
Washington, D.C.Ko Samui
IAD - USM
IADUSM
Washington, D.C. Dulles Intl
Tue 1/27
2:35 pm-8:05 am
2 stops29h 30m
Ko Samui
Tue 2/3
8:30 pm-8:29 pm
3 stops35h 59m
Washington, D.C.Ko Samui
IAD - USM
IADUSM
Washington, D.C. Dulles Intl
Thu 1/8
2:35 pm-7:35 pm
2 stops41h 00m
Ko Samui
Wed 1/14
8:50 am-9:05 am
2 stops60h 15m
Washington, D.C.Ko Samui
DCA - USM
DCAUSM
Washington, D.C. Reagan-National
Tue 1/27
6:42 pm-7:35 pm
2 stops36h 53m
Ko Samui
Tue 2/3
11:40 am-6:44 pm
2 stops43h 04m
Washington, D.C.Ko Samui
DCA - USM
DCAUSM
Washington, D.C. Reagan-National
Sun 5/31
11:00 am-7:10 am
3 stops33h 10m
Ko Samui
Mon 6/15
7:55 pm-7:58 pm
3 stops35h 03m
BaltimoreKo Samui
BWI - USM
BWIUSM
Baltimore/Washington
Wed 1/14
8:00 am-6:15 pm
3 stops46h 15m
Ko Samui
Wed 1/21
1:25 pm-9:26 pm
2 stops44h 01m
BaltimoreKo Samui
BWI - USM
BWIUSM
Baltimore/Washington
Wed 4/8
6:18 pm-9:10 pm
2 stops39h 52m
Ko Samui
Sun 4/19
1:30 pm-5:07 pm
2 stops38h 37m
Best time to book a flight from Maryland to Ko Samui
Have a flexible travel schedule? Discover the best time to fly to Ko Samui from Maryland with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Maryland to Ko Samui
What is the cheapest time of day to fly from MD to USM?
Find hourly flight availability from Maryland 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 December 15, 2025.
A simple way to save on the total cost of your ticket is to fly from Maryland to Ko Samui in the evening. If you’re flexible enough to do this you can expect to save up to 64% on your trip compared to booking a flight in the afternoon.
What is the cheapest day to fly from Maryland to Ko Samui?
Use this chart to determine the cheapest time to fly round-trip from Maryland to Ko Samui. Price data was last updated on March 30, 2025.
Travelers seeking maximum savings on their Maryland to Ko Samui flight should consider departing on Friday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.