$1,832+ Cheap flights from Baltimore (BWI) 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 5/20. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — USM
Feb 26 — Mar 51
1 adult, Economy
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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 Baltimore to Ko Samui
Cheapest flights from Baltimore to Ko SamuiExplore the most affordable flight options available from Baltimore to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 27, 2026.
Explore the most affordable flight options available from Baltimore to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 27, 2026.
This SmartFares deal was found by Cheapflights users on 1/27. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/206:20 am
BWI
- USM
2 stops48h 55m
Multiple Airlines
Fri 5/294:25 pm
USM
- BWI
2 stops49h 03m
Multiple Airlines
Deal found 1/27![Multiple Airlines logo]()
$1,832
This British Airways deal was found by Cheapflights users on 1/27. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/189:30 pm
BWI
- USM
2 stops36h 40m
British Airways
Sun 5/314:25 pm
USM
- BWI
2 stops38h 15m
British Airways
Deal found 1/27![British Airways logo]()
$2,593
This Ovago deal was found by Cheapflights users on 1/27. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/199:30 pm
BWI
- USM
2 stops33h 45m
British Airways
Thu 5/284:25 pm
USM
- BWI
2 stops38h 15m
British Airways
Deal found 1/27![British Airways logo]()
$2,676
This oojo deal was found by Cheapflights users on 1/27. 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.
Fri 2/138:35 pm
BWI
- USM
2 stops57h 40m
British Airways
Sat 2/211:25 pm
USM
- BWI
2 stops41h 20m
British Airways
Deal found 1/27![British Airways logo]()
$2,972
This Gurufare deal was found by Cheapflights users on 1/27. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/136:00 am
BWI
- USM
2 stops48h 15m
Singapore Airlines
Sat 2/214:25 pm
USM
- BWI
3 stops50h 09m
Singapore Airlines
Deal found 1/27![Singapore Airlines logo]()
$4,563
Find flight deals from Baltimore to Ko Samui
Discover tips and strategies to find the most affordable flight options for your journey from Baltimore (BWI) to Ko Samui (USM). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 27, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,832 (SmartFares) |
Cheapflights Fare Finder
Customize your flight search to find flights from Baltimore 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, Cheapflights users made 2,558,603 searches. Data last updated January 27, 2026.
Use the filters below to find and compare flights from Baltimore to Ko Samui that are best for you.
Fly from
Baltimore
Fly to
Ko Samui
Route
Depart
Return
Price
BaltimoreKo Samui
BWI - USM
BWIUSM
Baltimore/Washington
Fri 2/13
8:35 pm-6:15 pm
2 stops57h 40m
Ko Samui
Sat 2/21
1:25 pm-6:45 pm
2 stops41h 20m
$2,972
BaltimoreKo Samui
BWI - USM
BWIUSM
Baltimore/Washington
Fri 2/13
6:00 am-6:15 pm
2 stops48h 15m
Ko Samui
Sat 2/21
4:25 pm-6:34 am
3 stops50h 09m
$4,563
Compare providers for flights from Baltimore to Ko Samui
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Baltimore to Ko Samui in January.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Baltimore-Ko Samui flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Baltimore-Ko Samui flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Baltimore-Ko Samui flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Baltimore-Ko Samui flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Baltimore-Ko Samui flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Baltimore to Ko Samui
Have a flexible travel schedule? Discover the best time to fly to Ko Samui from Baltimore with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Baltimore to Ko Samui
Prices
Delays
What is the cheapest time of day to fly from BWI to USM?
Find hourly flight availability from Baltimore 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 January 27, 2026.
It’s typically best to fly out from Baltimore to Ko Samui in the evening. Doing so could potentially save you 64% on the flight price compared to flying in the afternoon, which is usually more expensive.
What is the cheapest day to fly from Baltimore to Ko Samui?
Use this chart to determine the cheapest time to fly round-trip from Baltimore to Ko Samui. Price data was last updated on March 30, 2025.
Travelers seeking maximum savings on their Baltimore 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.
How often are flights from Baltimore to Ko Samui delayed?
About 18% of weekly flights between Baltimore and Ko Samui have experienced delays in the past year, with the average delay time being 122 minutes.
What is the most punctual flight time for Baltimore to Ko Samui flights?
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Wednesday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on Baltimore to Ko Samui flights?
Over the last year, Delta have had the lowest number of delays on this route, with just 15% of flights being delayed.
Related info for your journey
Find useful and relevant information for your journey from Baltimore to Ko Samui. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Ko Samui?
Book flights to Ko Samui if you plan to visit one of these locationsKo Tao
Ko Pha Ngan