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Koh Samui

$576+ Cheap flights from Washington to Koh Samui (USM)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/14. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — USM
Nov 26 — Dec 31
Tue 11/26
Tue 12/3
1 adult, Economy
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Cheap flight deals from Washington to Koh Samui

Discover tips and strategies to find the most affordable flight options for your journey from Washington (USWA) to Koh 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 November 21, 2024.

Find flight deals from Washington to Koh Samui

Cheapest flights from Washington to Koh Samui
Explore the most affordable flight options available from Washington to Koh Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 21, 2024.

This Priceline deal was found by Cheapflights users on 11/20. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/35:00 pmPDX - USM
2 stops35h 35mMultiple Airlines
Thu 12/129:30 pmUSM - PDX
2 stops27h 04mMultiple Airlines
Deal found 11/20$1,717
This FlightHub deal was found by Cheapflights users on 11/21. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/1412:45 pmSEA - USM
2 stops27h 55mMultiple Airlines
Sun 12/229:20 pmUSM - SEA
2 stops28h 35mMultiple Airlines
Deal found 11/21$2,098
This FlightHub deal was found by Cheapflights users on 11/21. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/148:40 amSEA - USM
1 stop42h 45mSingapore Airlines
Sun 12/224:25 pmUSM - SEA
1 stop53h 45mSingapore Airlines
Deal found 11/21$3,139

Find flights from Washington to Koh Samui within your budget

Customize your flight search to find flights from Washington to Koh 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 2,612,795 searches. Data last updated November 21, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

SeattleKoh Samui

SEA - USM

SEAUSM

Seattle/Tacoma Intl

Thu 2/13

8:40 am-8:00 am

1 stop56h 20m

Ko Samui

Fri 3/14

8:55 am-8:10 am

1 stop37h 15m

$1,005

SeattleKoh Samui

SEA - USM

SEAUSM

Seattle/Tacoma Intl

Thu 2/13

12:45 pm-7:30 am

2 stops27h 45m

Ko Samui

Fri 3/14

9:05 pm-11:55 am

2 stops28h 50m

$1,054

SeattleKoh Samui

SEA - USM

SEAUSM

Seattle/Tacoma Intl

Mon 3/10

1:10 am-3:35 pm

2 stops24h 25m

Ko Samui

Wed 4/2

2:00 pm-7:30 pm

2 stops19h 30m

$1,058

SeattleKoh Samui

SEA - USM

SEAUSM

Seattle/Tacoma Intl

Thu 1/23

4:05 pm-3:10 pm

2 stops32h 05m

Ko Samui

Mon 1/27

3:05 pm-11:40 am

2 stops35h 35m

$1,433

PortlandKoh Samui

PDX - USM

PDXUSM

Portland

Wed 3/26

7:50 pm-7:35 pm

2 stops33h 45m

Ko Samui

Wed 4/9

4:25 pm-6:24 pm

2 stops39h 59m

$1,685

PortlandKoh Samui

PDX - USM

PDXUSM

Portland

Wed 3/26

11:36 am-10:35 am

3 stops32h 59m

Ko Samui

Wed 4/9

3:50 pm-12:52 pm

3 stops35h 02m

$2,108

SeattleKoh Samui

SEA - USM

SEAUSM

Seattle/Tacoma Intl

Sun 1/5

4:05 pm-6:15 pm

2 stops35h 10m

Ko Samui

Sun 1/12

8:15 am-12:35 pm

2 stops43h 20m

$4,288

SeattleKoh Samui

SEA - USM

SEAUSM

Seattle/Tacoma Intl

Thu 3/13

1:10 am-7:45 am

2 stops40h 35m

$607

SeattleKoh Samui

SEA - USM

SEAUSM

Seattle/Tacoma Intl

Sun 1/5

12:45 pm-7:30 am

2 stops27h 45m

$654

SeattleKoh Samui

SEA - USM

SEAUSM

Seattle/Tacoma Intl

Fri 3/14

5:05 pm-10:40 am

2 stops27h 35m

$759

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/21

Showing 1-10 of 14 results
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Best time to book a flight from Washington to Koh Samui

Have a flexible travel schedule? Discover the best time to fly to Koh Samui from Washington 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.

Travel insights for flights from Washington to Koh Samui

Get recent, data-driven insights about flights from Washington to Koh Samui including ideal travel times, pricing trends, and more.

What is the cheapest time of day to fly from WA to USM?

Find hourly flight availability from Washington to Koh Samui. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 21, 2024.

When flying from State of Washington to Koh Samui, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Koh Samui by month

Plan your trip to Koh Samui by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Koh Samui ranges from 2.3 - 19.3 inches per month. November is typically the wettest month, when rainfall can reach 19.3 in. February is typically the driest time to visit Koh Samui when rainfall is around 2.3 in.

Temperature in Koh Samui by month

Plan your trip to Koh Samui by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Koh Samui, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 80.6 F).

Reviews of airlines servicing Koh Samui

Get insights into the airlines that provide service to Koh Samui. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Koh Samui. Reviews last updated November 21, 2024.
EVA Air
8.4
Very good
1,308 reviews

Food

8.0

Comfort

8.2

Entertainment

8.0

Crew

8.6

Boarding

8.4

Overall

8.4

Reviews

1 / 10

The food was HORRIBLE, the flight crew looked as though they’d rather be getting a root canal, and the bathrooms were disgusting.

EVA Air
8.4
Very good
1,308 reviews
EVA Air
8.4
Very good
1,308 reviews

Food

8.0

Comfort

8.2

Entertainment

8.0

Crew

8.6

Boarding

8.4

Overall

8.4

Reviews

1 / 10

The food was HORRIBLE, the flight crew looked as though they’d rather be getting a root canal, and the bathrooms were disgusting.

Japan Airlines
8.3
Very good
1,457 reviews
EVA Air
8.4
Very good
1,308 reviews

Food

8.0

Comfort

8.2

Entertainment

8.0

Crew

8.6

Boarding

8.4

Overall

8.4

Reviews

1 / 10

The food was HORRIBLE, the flight crew looked as though they’d rather be getting a root canal, and the bathrooms were disgusting.

Emirates
8.1
Very good
3,489 reviews
EVA Air
8.4
Very good
1,308 reviews

Food

8.0

Comfort

8.2

Entertainment

8.0

Crew

8.6

Boarding

8.4

Overall

8.4

Reviews

1 / 10

The food was HORRIBLE, the flight crew looked as though they’d rather be getting a root canal, and the bathrooms were disgusting.

Singapore Airlines
8.1
Very good
1,338 reviews
EVA Air
8.4
Very good
1,308 reviews

Food

8.0

Comfort

8.2

Entertainment

8.0

Crew

8.6

Boarding

8.4

Overall

8.4

Reviews

1 / 10

The food was HORRIBLE, the flight crew looked as though they’d rather be getting a root canal, and the bathrooms were disgusting.

Qatar Airways
7.5
Good
3,829 reviews
EVA Air
8.4
Very good
1,308 reviews

Food

8.0

Comfort

8.2

Entertainment

8.0

Crew

8.6

Boarding

8.4

Overall

8.4

Reviews

1 / 10

The food was HORRIBLE, the flight crew looked as though they’d rather be getting a root canal, and the bathrooms were disgusting.

Related info for your journey

Find useful and relevant information for your journey from Washington to Koh Samui. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Koh Samui from Washington?

    Ko Samui (USM) is the airport you will fly into if you book a flight from Washington to Koh Samui. It is only a 2.1 mi journey from Ko Samui (USM) to Koh Samui’s city center.

  • What are the cheapest airlines to fly from State of Washington to Koh Samui one-way?

    To fly one-way, consider booking your trip with EVA Air, which is currently one of the cheapest options available, starting at $607. Qatar Airways flights start at $759 while deals on Singapore Airlines start at $958 one-way.

  • Can I find deals for flights from Washington to Koh Samui that include hotel bookings?

    Yes. In addition to deals on Washington to Koh Samui flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington to Koh Samui?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Koh Samui.

  • Can I find deals for business class flights from Washington to Koh Samui?

    Yes. Cheapflights offers flight deals from Washington to Koh Samui by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Alternative routes for Washington to Koh Samui

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Top airline flying from Washington to Koh Samui

Discover the top airline that operate flights from Washington to Koh Samui. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,612,795 searches. Data last updated November 21, 2024.
AirlineCheapestAverageFlexibilityOn-time
EVA AirCheapest$1,269Average$1,417FlexibilityNo cancel feeOn-time74%
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