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Cheap flights from Maryland to Ko Samui from $621

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Maryland to Ko Samui departing on 4/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Maryland to Ko Samui

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
3:10 pm - 8:25 am
IAD
-
USM
30h 15m
2 stops
Multiple Airlines Logo
6:00 am - 9:45 am
USM
-
IAD
38h 45m
2 stops
$1,102Multiple Airlines
Wed, May 6 - Thu, May 14
Turkish Airlines Logo
1:20 pm - 8:15 am
IAD
-
USM
31h 55m
2 stops
Turkish Airlines Logo
6:00 am - 11:35 am
USM
-
IAD
40h 35m
2 stops
$1,136Turkish Airlines
Sat, May 9 - Sun, May 17
Multiple Airlines Logo
3:10 pm - 10:30 am
IAD
-
USM
32h 20m
2 stops
Multiple Airlines Logo
6:00 am - 9:45 am
USM
-
IAD
38h 45m
2 stops
$1,143Multiple Airlines
Sat, May 9 - Sun, May 17
Etihad Airways Logo
3:10 pm - 7:10 am
IAD
-
USM
29h 00m
2 stops
Etihad Airways Logo
5:25 pm - 9:45 am
USM
-
IAD
27h 20m
2 stops
$1,242Etihad Airways
Thu, Aug 13 - Wed, Aug 19
Etihad Airways Logo
3:10 pm - 7:30 am
IAD
-
USM
29h 20m
2 stops
Etihad Airways Logo
8:55 am - 9:45 am
USM
-
IAD
59h 50m
2 stops
$1,261Etihad Airways
Wed, Apr 15 - Wed, Apr 22
Multiple Airlines Logo
3:10 pm - 11:05 am
IAD
-
USM
32h 55m
2 stops
Multiple Airlines Logo
9:00 pm - 9:45 am
USM
-
IAD
47h 45m
2 stops
$1,267Multiple Airlines
Fri, Apr 17 - Fri, Apr 24
Cathay Pacific Logo
11:36 am - 7:40 pm
DCA
-
USM
45h 04m
2 stops
Cathay Pacific Logo
11:55 am - 7:05 pm
USM
-
DCA
42h 10m
2 stops
$1,410Cathay Pacific
Thu, Apr 9 - Wed, Apr 22
Cathay Pacific Logo
6:59 pm - 7:40 pm
DCA
-
USM
37h 41m
2 stops
Cathay Pacific Logo
11:55 am - 7:05 pm
USM
-
DCA
42h 10m
2 stops
$1,411Cathay Pacific
Wed, Apr 8 - Tue, Apr 21
British Airways Logo
9:35 pm - 6:15 pm
BWI
-
USM
33h 40m
2 stops
British Airways Logo
1:30 pm - 7:40 pm
USM
-
BWI
41h 10m
2 stops
$2,552British Airways
Sun, Apr 12 - Sun, Apr 19
British Airways Logo
9:30 pm - 6:15 pm
BWI
-
USM
33h 45m
2 stops
British Airways Logo
4:25 pm - 7:40 pm
USM
-
BWI
38h 15m
2 stops
$2,647British Airways
Wed, Apr 15 - Wed, Apr 22

Cathay Pacific flights from Maryland to Ko Samui

Our best Cathay Pacific deals on Maryland to Ko Samui flight tickets
Cathay Pacific
Apr 9
DCA11:36 amWashington, D.C. Reagan-National
45h 04m
2 stops
USM7:40 pmKo Samui
Apr 22
USM11:55 amKo Samui
42h 10m
2 stops
DCA7:05 pmWashington, D.C. Reagan-National
$1,410
Cathay Pacific
Apr 8
DCA6:59 pmWashington, D.C. Reagan-National
37h 41m
2 stops
USM7:40 pmKo Samui
Apr 21
USM11:55 amKo Samui
42h 10m
2 stops
DCA7:05 pmWashington, D.C. Reagan-National
$1,411
Cathay Pacific
Apr 10
DCA6:59 pmWashington, D.C. Reagan-National
37h 41m
2 stops
USM7:40 pmKo Samui
Apr 22
USM11:55 amKo Samui
46h 04m
2 stops
DCA10:59 pmWashington, D.C. Reagan-National
$1,429

Qatar Airways flights from Maryland to Ko Samui

Our best Qatar Airways deals on Maryland to Ko Samui flight tickets
Qatar Airways
Apr 7
IAD9:00 pmWashington, D.C. Dulles Intl
34h 00m
2 stops
USM6:00 pmKo Samui
Apr 24
USM6:00 amKo Samui
61h 40m
2 stops
IAD8:40 amWashington, D.C. Dulles Intl
$1,468
Qatar Airways
Apr 7
IAD9:00 pmWashington, D.C. Dulles Intl
32h 55m
2 stops
USM4:55 pmKo Samui
Apr 25
USM5:35 pmKo Samui
33h 30m
2 stops
IAD4:05 pmWashington, D.C. Dulles Intl
$1,494
Qatar Airways
Apr 10
IAD9:00 pmWashington, D.C. Dulles Intl
36h 25m
2 stops
USM8:25 pmKo Samui
Apr 24
USM6:00 amKo Samui
61h 40m
2 stops
IAD8:40 amWashington, D.C. Dulles Intl
$1,508

momondo Fare Finder

 
Customize your flight search to find flights from Maryland 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 March 4, 2026.
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 5/6

3:10 pm-8:25 am

2 stops30h 15m

Ko Samui

Thu 5/14

6:00 am-9:45 am

2 stops38h 45m

$1,102

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Sat 5/9

1:20 pm-8:15 am

2 stops31h 55m

Ko Samui

Sun 5/17

6:00 am-11:35 am

2 stops40h 35m

$1,136

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Sat 5/9

3:10 pm-10:30 am

2 stops32h 20m

Ko Samui

Sun 5/17

6:00 am-9:45 am

2 stops38h 45m

$1,143

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Thu 8/13

3:10 pm-7:10 am

2 stops29h 00m

Ko Samui

Wed 8/19

5:25 pm-9:45 am

2 stops27h 20m

$1,242

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Wed 4/15

3:10 pm-7:30 am

2 stops29h 20m

Ko Samui

Wed 4/22

8:55 am-9:45 am

2 stops59h 50m

$1,261

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Fri 4/17

3:10 pm-11:05 am

2 stops32h 55m

Ko Samui

Fri 4/24

9:00 pm-9:45 am

2 stops47h 45m

$1,267

Washington, D.C.Ko Samui

DCA - USM

DCAUSM

Washington, D.C. Reagan-National

Thu 4/9

11:36 am-7:40 pm

2 stops45h 04m

Ko Samui

Wed 4/22

11:55 am-7:05 pm

2 stops42h 10m

$1,410

Washington, D.C.Ko Samui

DCA - USM

DCAUSM

Washington, D.C. Reagan-National

Wed 4/8

6:59 pm-7:40 pm

2 stops37h 41m

Ko Samui

Tue 4/21

11:55 am-7:05 pm

2 stops42h 10m

$1,411

BaltimoreKo Samui

BWI - USM

BWIUSM

Baltimore/Washington

Sun 4/12

9:35 pm-6:15 pm

2 stops33h 40m

Ko Samui

Sun 4/19

1:30 pm-7:40 pm

2 stops41h 10m

$2,552

BaltimoreKo Samui

BWI - USM

BWIUSM

Baltimore/Washington

Wed 4/15

9:30 pm-6:15 pm

2 stops33h 45m

Ko Samui

Wed 4/22

4:25 pm-7:40 pm

2 stops38h 15m

$2,647

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 resultsSorted by cheapest first
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See travel insights to Ko Samui from

How to get the cheapest flight ticket from Maryland 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

What is the cheapest day to depart on your flight to Ko Samui?

Our data shows that Wednesday is the least expensive day to fly to Ko Samui. Tickets to fly out on this day can be as low as $325. Flights from Maryland to Ko Samui on a Sunday will generally be more expensive and average around $714. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Ko Samui?

Our data shows that the cheapest Maryland to Ko Samui flights are usually those with departure times in the evening. Our users have found flights to Ko Samui in the evening for as low as $286. At noon is when there is more demand to fly to Ko Samui, so prices are often more expensive at around $399 per ticket.

Cheap Maryland to Ko Samui flight deals and tips

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

Fastest flight time

27h 40m

Direct flights

None
The fastest flight from Maryland to Ko Samui takes 27h 40m
There are no direct flights from Maryland to Ko Samui. There are no popular flight routes from Maryland to Ko Samui.
Search flight deals

  • When did momondo last update prices for flights from Maryland to Ko Samui Airport?

    Prices for flights from Maryland to Ko Samui Airport are updated daily.

  • How old do you have to be to fly from Maryland to Ko Samui Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Maryland to Ko Samui Airport.

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

    The necessary travel and health documents for your Ko Samui Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking 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 Tao
Ko Pha Ngan
Khanom

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Ko Samui from Maryland.

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

All flight searches from Maryland to Ko Samui on momondo can be filtered to show those which offer flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Maryland to Ko Samui.

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

Price alerts on flights to Ko Samui from Maryland are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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